Multicasting Issues

kenneth.sisco

I’m having a lot of trouble getting multicast working in my environment. I work for a University where our networks are all segmented into multiple VLANs, and I don’t have the ability to put FOG on the same VLAN as the clients - we have about 10 computer labs and our FOG server is a VMWare virtual machine in our data center. Each computer lab is on its own VLAN, and the data center is as well.

Our network team has a lot of controls on the network that I cannot see, but they assigned me a multicast range of 239.132.20.0 /24. Since this doesn’t match the default that FOG uses, I upgraded to the Trunk version of FOG to allow me to customize that. The network team setup a test multicast node within that multicast range and ran several small tests from their utilities across all of my VLANs and have had no hiccups at all, leading them to believe that the problem lies on the FOG server somewhere.

Here’s where I’m at on the server:
OS: Ubuntu Server 14.04.3 LTS
FOG Trunk revision: 4623

On the FOG server, I have a small 8GB image for testing. Under FOG Configuration -> FOG Settings -> Multicast Settings, I have configured the following:

FOG_UDPCAST_INTERFACE: eth0
FOG_UDPCAST_STARTINGPORT: 63072
FOG_MULTICAST_MAX_SESSIONS: 64
FOG_UDPCAST_MAXWAIT	: 10
FOG_MULTICAST_ADDRESS: 239.132.20.10
FOG_MULTICAST_PORT_OVERRIDE: 0
FOG_MULTICAST_DUPLEX: FULL_DUPLEX

I have registered two test hosts, and am attempting to get one working before trying two. I’ve double-checked under Active Tasks and Active Multicast tasks to ensure nothing is currently running. I’ve rebooted the server and restarted FOGMulticastManager, FOGImageReplicator, and FOGScheduler services (in case they didn’t start properly).

When trying to multicast to a single client, I get inconsistent results. Most of the time, the client gets stuck at “Starting to restore image ( - ) to device (/dev/sda1).” Other times, it’ll get past that point and show a status bar, but the bar will be stuck at 0% with a transfer rate of 0.00bytes/min. The latter of which is incredibly difficult for me to replicate, I’ve found. Most of the time, I’m stuck at the former.

Here’s what the multicast.log looks like:

[01-09-16 6:31:41 pm] Interface Ready with IP Address: 10.133.132.127

[01-09-16 6:31:41 pm]  * Starting MulticastManager Service

[01-09-16 6:31:41 pm]  * Checking for new items every 10 seconds

[01-09-16 6:31:41 pm]  * Starting service loop

[01-09-16 6:31:41 pm]  * No tasks found!
[01-09-16 6:31:51 pm]  * No tasks found!

[01-09-16 6:32:01 pm]  * No tasks found!

[01-09-16 6:32:11 pm]  | Sleeping for 10 seconds to ensure tasks are properly submitted

[01-09-16 6:32:21 pm]  | 0 tasks to be cleaned
[01-09-16 6:32:21 pm]  | 1 task found

[01-09-16 6:32:21 pm]  | Task (11) Multi-Cast Task is new!

[01-09-16 6:32:21 pm]  | Task (11) Multi-Cast Task has been cleaned.

[01-09-16 6:32:21 pm]  | Task (11) /images/Test162016 image file found.

[01-09-16 6:32:21 pm]  | Task (11) 1 client(s) found.
Udp-sender 20120424

[01-09-16 6:32:21 pm]  | Task (11) Multi-Cast Task sending on base port: 64512
UDP sender for (stdin) at 10.133.132.127 on eth0 
Broadcasting control to 224.0.0.1
[01-09-16 6:32:21 pm]  | CMD: cat /images/Test162016/d1p1.img | /usr/local/sbin/udp-sender --interface eth0 --min-receivers 1 --max-wait 600 --mcast-data-address 239.132.20.10 --portbase 64512 --full-duplex --ttl 32 --nokbd --nopointopoint;cat /images/Test162016/d1p2.img | /usr/local/sbin/udp-sender --interface eth0 --min-receivers 1 --max-wait 600 --mcast-data-address 239.132.20.10 --portbase 64512 --full-duplex --ttl 32 --nokbd --nopointopoint;
[01-09-16 6:32:21 pm]  | Task (11) Multi-Cast Task has started.

[01-09-16 6:32:31 pm]  | 0 tasks to be cleaned

[01-09-16 6:32:31 pm]  | 1 task found

[01-09-16 6:32:31 pm]  | Task (11) Multi-Cast Task is already running PID 3793

[01-09-16 6:32:41 pm]  | 0 tasks to be cleaned

[01-09-16 6:32:41 pm]  | 1 task found

[01-09-16 6:32:41 pm]  | Task (11) Multi-Cast Task is already running PID 3793

[01-09-16 6:32:51 pm]  | 0 tasks to be cleaned

[01-09-16 6:32:51 pm]  | 1 task found

[01-09-16 6:32:51 pm]  | Task (11) Multi-Cast Task is already running PID 3793

[01-09-16 6:33:01 pm]  | 0 tasks to be cleaned
[01-09-16 6:33:01 pm]  | 1 task found

[01-09-16 6:33:01 pm]  | Task (11) Multi-Cast Task is already running PID 3793

[01-09-16 6:33:11 pm]  | 0 tasks to be cleaned

[01-09-16 6:33:11 pm]  | 1 task found

[01-09-16 6:33:11 pm]  | Task (11) Multi-Cast Task is already running PID 3793

[01-09-16 6:33:21 pm]  | 0 tasks to be cleaned

[01-09-16 6:33:21 pm]  | 1 task found

[01-09-16 6:33:21 pm]  | Task (11) Multi-Cast Task is already running PID 3793
New connection from 10.20.129.47  (#0) 00000009
Starting transfer: 00000009
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=10000

[01-09-16 6:33:31 pm]  | 0 tasks to be cleaned

[01-09-16 6:33:31 pm]  | 1 task found

[01-09-16 6:33:31 pm]  | Task (11) Multi-Cast Task is already running PID 3793

Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=10000

Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=10000

[01-09-16 6:33:41 pm]  | 0 tasks to be cleaned

[01-09-16 6:33:41 pm]  | 1 task found

[01-09-16 6:33:41 pm]  | Task (11) Multi-Cast Task is already running PID 3793

Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=10000

Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=10000

[01-09-16 6:33:51 pm]  | 0 tasks to be cleaned

[01-09-16 6:33:51 pm]  | 1 task found

[01-09-16 6:33:51 pm]  | Task (11) Multi-Cast Task is already running PID 3793

Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=10000

[01-09-16 6:34:02 pm]  | 0 tasks to be cleaned

[01-09-16 6:34:02 pm]  | 1 task found

[01-09-16 6:34:02 pm]  | Task (11) Multi-Cast Task is already running PID 3793

Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=10000

Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=10000

[01-09-16 6:34:12 pm]  | 0 tasks to be cleaned
[01-09-16 6:34:12 pm]  | 1 task found

[01-09-16 6:34:12 pm]  | Task (11) Multi-Cast Task is already running PID 3793

Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=10000

Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=10000

[01-09-16 6:34:22 pm]  | 0 tasks to be cleaned

[01-09-16 6:34:22 pm]  | 1 task found

[01-09-16 6:34:22 pm]  | Task (11) Multi-Cast Task is already running PID 3793

Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=10000

[01-09-16 6:34:32 pm]  | 0 tasks to be cleaned

[01-09-16 6:34:32 pm]  | 1 task found

[01-09-16 6:34:32 pm]  | Task (11) Multi-Cast Task is already running PID 3793

Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=10000

Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=10000

[01-09-16 6:34:42 pm]  | 0 tasks to be cleaned

[01-09-16 6:34:42 pm]  | 1 task found

[01-09-16 6:34:42 pm]  | Task (11) Multi-Cast Task is already running PID 3793

Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=10000

Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=10000

[01-09-16 6:34:52 pm]  | 0 tasks to be cleaned

[01-09-16 6:34:52 pm]  | 1 task found

[01-09-16 6:34:52 pm]  | Task (11) Multi-Cast Task is already running PID 3793

Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=10000

[01-09-16 6:35:02 pm]  | 0 tasks to be cleaned

[01-09-16 6:35:02 pm]  | 1 task found

[01-09-16 6:35:02 pm]  | Task (11) Multi-Cast Task is already running PID 3793

Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=10000

Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=10000

[01-09-16 6:35:12 pm]  | 0 tasks to be cleaned

[01-09-16 6:35:12 pm]  | 1 task found

[01-09-16 6:35:12 pm]  | Task (11) Multi-Cast Task is already running PID 3793

Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=10000

Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=10000

[01-09-16 6:35:22 pm]  | 0 tasks to be cleaned

[01-09-16 6:35:22 pm]  | 1 task found

[01-09-16 6:35:22 pm]  | Task (11) Multi-Cast Task is already running PID 3793

Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=10000

[01-09-16 6:35:32 pm]  | 0 tasks to be cleaned

[01-09-16 6:35:32 pm]  | 1 task found

[01-09-16 6:35:32 pm]  | Task (11) Multi-Cast Task is already running PID 3793

Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=10000

Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=10000

[01-09-16 6:35:42 pm]  | 0 tasks to be cleaned

[01-09-16 6:35:42 pm]  | 1 task found

[01-09-16 6:35:42 pm]  | Task (11) Multi-Cast Task is already running PID 3793

Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=10000

Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=10000

[01-09-16 6:35:52 pm]  | 0 tasks to be cleaned

[01-09-16 6:35:52 pm]  | 1 task found

[01-09-16 6:35:52 pm]  | Task (11) Multi-Cast Task is already running PID 3793

Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=10000

[01-09-16 6:36:02 pm]  | 0 tasks to be cleaned

[01-09-16 6:36:02 pm]  | 1 task found

[01-09-16 6:36:02 pm]  | Task (11) Multi-Cast Task is already running PID 3793

Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=10000

Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=10000

[01-09-16 6:36:12 pm]  | 0 tasks to be cleaned

[01-09-16 6:36:12 pm]  | 1 task found

[01-09-16 6:36:12 pm]  | Task (11) Multi-Cast Task is already running PID 3793

Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=10000

[01-09-16 6:36:22 pm]  | 0 tasks to be cleaned

[01-09-16 6:36:22 pm]  | 1 task found

[01-09-16 6:36:22 pm]  | Task (11) Multi-Cast Task is already running PID 3793

Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=10000

Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=10000

[01-09-16 6:36:32 pm]  | 0 tasks to be cleaned

[01-09-16 6:36:32 pm]  | 1 task found

[01-09-16 6:36:32 pm]  | Task (11) Multi-Cast Task is already running PID 3793

Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=10000

Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=10000

[01-09-16 6:36:42 pm]  | 0 tasks to be cleaned

[01-09-16 6:36:42 pm]  | 1 task found

[01-09-16 6:36:42 pm]  | Task (11) Multi-Cast Task is already running PID 3793
Dropping client #0 because of timeout
Disconnecting #0 (10.20.129.47)
bytes=                re-xmits=0000000 (  0.0%) slice=0112 -   0
Transfer complete.

cat: write error: Broken pipe
Udp-sender 20120424
UDP sender for (stdin) at 10.133.132.127 on eth0 
Broadcasting control to 224.0.0.1

[01-09-16 6:36:52 pm]  | 0 tasks to be cleaned

[01-09-16 6:36:52 pm]  | 1 task found

[01-09-16 6:36:52 pm]  | Task (11) Multi-Cast Task is already running PID 3793

[01-09-16 6:37:02 pm]  | 0 tasks to be cleaned

[01-09-16 6:37:02 pm]  | 1 task found

[01-09-16 6:37:02 pm]  | Task (11) Multi-Cast Task is already running PID 3793

[01-09-16 6:37:12 pm]  | 0 tasks to be cleaned

[01-09-16 6:37:12 pm]  | 1 task found

[01-09-16 6:37:12 pm]  | Task (11) Multi-Cast Task is already running PID 3793

[01-09-16 6:37:22 pm]  | 0 tasks to be cleaned

[01-09-16 6:37:22 pm]  | 1 task found

[01-09-16 6:37:22 pm]  | Task (11) Multi-Cast Task is already running PID 3793

[01-09-16 6:37:32 pm]  | 0 tasks to be cleaned

[01-09-16 6:37:32 pm]  | 1 task found

[01-09-16 6:37:32 pm]  | Task (11) Multi-Cast Task is already running PID 3793

[01-09-16 6:37:42 pm]  | 0 tasks to be cleaned

[01-09-16 6:37:42 pm]  | 1 task found

[01-09-16 6:37:42 pm]  | Task (11) Multi-Cast Task is already running PID 3793
[01-09-16 6:37:52 pm]  | 0 tasks to be cleaned

[01-09-16 6:37:52 pm]  | 1 task found

[01-09-16 6:37:52 pm]  | Task (11) Multi-Cast Task is already running PID 3793

I’m not sure where to go next in my troubleshooting. Any help?

Wayne Workman

@kenneth.sisco Can FOG Multicast on the VLAN that it’s actually within ? We should focus on that first.

Tom Elliott

Most times when I see the “This task has been cleaned” directly after it starting, I find it is because of the interface of the network not being set properly for the interface on the system trying to run the multicast job. I will test just to see if things are still good, but I’m nearly certain this is the case.

You could try running the command you see in the log by itself to see if it spits out any other pertinent information as well.

kenneth.sisco

@Tom-Elliott said:

Most times when I see the “This task has been cleaned” directly after it starting, I find it is because of the interface of the network not being set properly for the interface on the system trying to run the multicast job. I will test just to see if things are still good, but I’m nearly certain this is the case.

You could try running the command you see in the log by itself to see if it spits out any other pertinent information as well.

I ran the command by hand and didn’t see anything happen. Booting the client to test the multicast didn’t change this. Logs looked exactly the same as what I posted above. Here’s a screenshot of what I saw when I type the command by hand:

@Wayne-Workman said:

@kenneth.sisco Can FOG Multicast on the VLAN that it’s actually within ? We should focus on that first.

I wish I could test that, but the network team doesn’t allow DHCP to be enabled on server VLANs (or within the data center for that matter). If you know of a way I could do this without DHCP, I’d be happy to try.

Tom Elliott

@kenneth.sisco said:

sounds like, to me, the switch is not allowing udp broadcast forwarding. This is just a guess at this point.

I’ve tested Multicast, and all seems to be working fine.

I’ve also messed a lot, today, with the fog scripts. Hopefully things are better and I’ve been republishing them as I find things and fix them too.

To me, like Wayne suggested, you should start by imaging within the same switch first (not across vlan’s).

kenneth.sisco

I’ll reach out to our network team on Monday, then, and see if they’ll help me setup a test environment. Thanks for the help - I’ll report back soon!

george1421

@kenneth.sisco Make sure that your network switches have igmp forwarding or snooping enabled. If you have vlans in your network the igmp settings are typically set on a per vlan basis. The igmp settings allows the switch ports to subscribe to the multicast channel. The multicast stream will only be sent to ports and switches that subscribe to the multicast request. This keeps multicast traffic off switches where there are no subscribers.

kenneth.sisco

So I worked with our network team and we were able to setup a small DHCP pool on the server VLAN temporarily for a test, and it worked fine. Once we tried again cross-VLAN, we had the same issues. I’ve copied the multicast.log section of the successful multicast below. The unsuccessful one is the same as my prior post in this thread. What I find interesting is that the multicast.log file shows that there is a new connection from the client cross-VLAN and even echoes its IP Address, but never transfers any data.

Successful multicast (same VLAN; shortened to allow for forum posting):

[01-11-16 4:54:24 pm]  * No tasks found!
[01-11-16 4:54:34 pm]  | Sleeping for 10 seconds to ensure tasks are properly submitted
[01-11-16 4:54:44 pm]  | 0 tasks to be cleaned
[01-11-16 4:54:44 pm]  | 1 task found
[01-11-16 4:54:44 pm]  | Task (14) Multi-Cast Task is new!
[01-11-16 4:54:44 pm]  | Task (14) Multi-Cast Task has been cleaned.
[01-11-16 4:54:44 pm]  | Task (14) /images/Test162016 image file found.
[01-11-16 4:54:44 pm]  | Task (14) 1 client(s) found.
[01-11-16 4:54:44 pm]  | Task (14) Multi-Cast Task sending on base port: 50702
Udp-sender 20120424
UDP sender for (stdin) at 10.133.132.127 on eth0 
Broadcasting control to 224.0.0.1
[01-11-16 4:54:44 pm]  | CMD: cat /images/Test162016/d1p1.img | /usr/local/sbin/udp-sender --interface eth0 --min-receivers 1 --max-wait 600 --mcast-data-address 239.132.20.10 --portbase 50702 --full-duplex --ttl 32 --nokbd --nopointopoint;cat /images/Test162016/d1p2.img | /usr/local/sbin/udp-sender --interface eth0 --min-receivers 1 --max-wait 600 --mcast-data-address 239.132.20.10 --portbase 50702 --full-duplex --ttl 32 --nokbd --nopointopoint;
[01-11-16 4:54:44 pm]  | Task (14) Multi-Cast Task has started.
[01-11-16 4:54:54 pm]  | 0 tasks to be cleaned
[01-11-16 4:54:54 pm]  | 1 task found
[01-11-16 4:54:54 pm]  | Task (14) Multi-Cast Task is already running PID 27247
New connection from 10.133.132.242  (#0) 00000009
Starting transfer: 00000009
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=10000
[01-11-16 4:55:04 pm]  | 0 tasks to be cleaned
[01-11-16 4:55:04 pm]  | 1 task found
[01-11-16 4:55:04 pm]  | Task (14) Multi-Cast Task is already running PID 27247
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=10000
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=10000
[01-11-16 4:55:14 pm]  | 0 tasks to be cleaned
[01-11-16 4:55:14 pm]  | 1 task found
[01-11-16 4:55:14 pm]  | Task (14) Multi-Cast Task is already running PID 27247
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=10000
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=10000
[01-11-16 4:55:24 pm]  | 0 tasks to be cleaned
[01-11-16 4:55:24 pm]  | 1 task found
[01-11-16 4:55:24 pm]  | Task (14) Multi-Cast Task is already running PID 27247
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=10000
[01-11-16 4:55:34 pm]  | 0 tasks to be cleaned
[01-11-16 4:55:34 pm]  | 1 task found
[01-11-16 4:55:34 pm]  | Task (14) Multi-Cast Task is already running PID 27247
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=10000
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=10000
[01-11-16 4:55:44 pm]  | 0 tasks to be cleaned
[01-11-16 4:55:44 pm]  | 1 task found
[01-11-16 4:55:44 pm]  | Task (14) Multi-Cast Task is already running PID 27247
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=10000
bytes=     131 040  re-xmits=0000090 (100.0%) slice=0112 -   0

Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=2143
bytes=  4 925 648  re-xmits=0000285 (  8.4%) slice=0112 -   0
bytes=  8 441 244  re-xmits=0000408 (  7.0%) slice=0112 -   0

Transfer complete.
Disconnecting #0 (10.133.132.242)

Udp-sender 20120424
UDP sender for (stdin) at 10.133.132.127 on eth0 
Broadcasting control to 224.0.0.1
[01-11-16 4:55:54 pm]  | 0 tasks to be cleaned
[01-11-16 4:55:54 pm]  | 1 task found
[01-11-16 4:55:54 pm]  | Task (14) Multi-Cast Task is already running PID 27247
New connection from 10.133.132.242  (#0) 00000009
[01-11-16 4:56:04 pm]  | 0 tasks to be cleaned
[01-11-16 4:56:04 pm]  | 1 task found
[01-11-16 4:56:04 pm]  | Task (14) Multi-Cast Task is already running PID 27247
Starting transfer: 00000009
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=1606
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=1554
bytes=  4 976 608  re-xmits=0000206 (  6.0%) slice=0112 -   0

Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=877
bytes= 33 904 416  re-xmits=0003153 ( 13.5%) slice=0112 -   0

Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=414
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=1051
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=1001
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=917
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=981
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=1439
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=1504
bytes= 51 679 264  re-xmits=0005546 ( 15.6%) slice=0112 -   0
bytes= 67 660 320  re-xmits=0009744 ( 20.9%) slice=0112 -   0

Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=1059
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=732
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=553
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=576
bytes=102 883 872  re-xmits=0013016 ( 18.4%) slice=0112 -   0

Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=725
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=666
bytes=133 985 488  re-xmits=0015786 ( 17.1%) slice=0112 -   0

Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=837
bytes=154 532 560  re-xmits=0020475 ( 19.2%) slice=0112 -   0

Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=678
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[01-11-16 4:56:14 pm]  | 0 tasks to be cleaned
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[01-11-16 4:56:14 pm]  | Task (14) Multi-Cast Task is already running PID 27247
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[01-11-16 4:56:24 pm]  | 0 tasks to be cleaned
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[01-11-16 4:56:24 pm]  | Task (14) Multi-Cast Task is already running PID 27247

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[01-11-16 4:56:34 pm]  | 0 tasks to be cleaned
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[01-11-16 4:56:34 pm]  | Task (14) Multi-Cast Task is already running PID 27247
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Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=774
bytes=  1 351 614K re-xmits=0198288 ( 20.8%) slice=0112 -   0

Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=448
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=851
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=881
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=1157
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=1428
bytes=  1 368 335K re-xmits=0201724 ( 20.9%) slice=0112 -   0
bytes=  1 392 063K re-xmits=0207147 ( 21.1%) slice=0112 -   0

Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=715
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=732
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=607
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=687
bytes=  1 414 677K re-xmits=0212032 ( 21.3%) slice=0112 -   0

Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=1105
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=1198
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=892
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=781
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=705
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=748
bytes=  1 432 513K re-xmits=0215533 ( 21.3%) slice=0112 -   0

Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=409
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=391
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=416
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=434
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=751
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=756
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=601
bytes=  1 462 770K re-xmits=0219103 ( 21.2%) slice=0112 -   0

Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=832
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=706
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=641
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=649
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=669
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=511
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=880
bytes=  1 485 702K re-xmits=0223774 ( 21.4%) slice=0112 -   0

Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=727
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=761
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=595
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=599
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=814
bytes=  1 507 997K re-xmits=0228263 ( 21.5%) slice=0112 -   0

Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=783
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=897
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=893
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=976
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=929
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=971
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=783
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=1336
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=924
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=1032
[01-11-16 4:56:44 pm]  | 0 tasks to be cleaned
[01-11-16 4:56:44 pm]  | 1 task found
[01-11-16 4:56:44 pm]  | Task (14) Multi-Cast Task is already running PID 27247
bytes=  1 519 782K re-xmits=0231518 ( 21.6%) slice=0112 -   0

Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=636
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=596
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=633
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=636
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=607
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=640
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=638
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=690
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=822
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=516
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=601
Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=998
bytes=  1 540 803K re-xmits=0236158 ( 21.7%) slice=0112 -   0


Transfer complete.
Disconnecting #0 (10.133.132.242)

[01-11-16 4:57:44 pm]  | 0 tasks to be cleaned
[01-11-16 4:57:44 pm]  | 1 task found
[01-11-16 4:57:44 pm]  | Task (14) Multi-Cast Task is no longer running.
[01-11-16 4:57:44 pm]  | Task (14) Multi-Cast Task has been cleaned as complete.
[01-11-16 4:57:54 pm]  * No tasks found!

Tom Elliott

@kenneth.sisco making a connection is simple but the udp stream is not being allowed to pass after the initial connection is made. The separated network method you used sounds to have a slight difference from the real network side. I don’t know what or where. This does not sound like something fog is failing to do though, like I said, I’d take a look if you can on whether broadcast forwarding is on.

Wayne Workman

@Tom-Elliott said:

I’d take a look if you can on whether broadcast forwarding is on.

I agree with Tom. Broadcast forwarding is exactly what you need. This happens on your router - as a routing device is the only way that data from one LAN (or V-LAN) can traverse to other LANs (or V-LANS).

Broadcast forwarding is called different things based on what vendor / piece of equipment you use. But it’s quite simply that which allows broadcast traffic to pass through a router. You’re network team don’t need to open everything up, they just need to allow passage from the server vlan to other vlans, and back. If your network team is really skilled, they can even limit it to a specific port on a specific switch, or a specific sending IP (the fog server’s IP).

kenneth.sisco

So I’m working with our network team to troubleshoot this, and we have “broadcast forwarding” working for the most part, but we’re going to keep digging. One thing we were concerned about was TTL on the client side. We can see the TTL from the server in the multicast.log, but we’re concerned about what the TTL is on the udp-receiver command. Is there a way to see that? Or a way to specify it? I was looking for the task files that 0.32 used to have stored in the tftpboot folder, but this version of Fog handles that differently, so I’m not sure where to find them.

Wayne Workman

@kenneth.sisco said:

Is there a way to see that? Or a way to specify it?

It’s set to 32.

The setting is part of the init, so to change it, you’ll need to edit it.

Here are instructions on editing the init:
https://wiki.fogproject.org/wiki/index.php?title=Modifying_the_Init_Image

Here’s the command I used to find the command and it’s output.

grep -rnw '/root/svn/trunk' -e "udp-receiver"

/root/svn/trunk/.svn/pristine/34/347286bf65c7493cf5cd96049b458c34ad245cff.svn-base:374:        udp-receiver --nokbd --portbase $port --ttl 32 --mcast-rdv-address $storageip 2>/dev/null > /tmp/pigz1 &
/root/svn/trunk/.svn/pristine/9f/9fbd1e42a40bc6fc567380e512a84c93d309d6b7.svn-base:442:            udp-receiver --nokbd --portbase $port --ttl 32 --mcast-rdv-address $storageip 2>/dev/null >/tmp/pigz1 &
/root/svn/trunk/src/buildroot/package/fog/scripts/usr/share/fog/lib/funcs.sh:442:            udp-receiver --nokbd --portbase $port --ttl 32 --mcast-rdv-address $storageip 2>/dev/null >/tmp/pigz1 &

For the record, I have went through 0.32’s code and I don’t see that ttl is specified at all in 0.32.
Here is the output of the above search command when I pointed it at the 0.32 directory I checked out via svn:

(the code lines are very wide, click and drag right to see it all)

/root/svn/0.32/trunk/.svn/pristine/0c/0ce1eec0cc580ce17d377e5ef7c3ca6b4d39abab.svn-base:271:                                                        udp-receiver --nokbd --portbase ${port} --mcast-rdv-address ${storageip} 2>/dev/null | gunzip -f -c 2>/dev/null | partimage -f3 -b restore $win7sys stdin
/root/svn/0.32/trunk/.svn/pristine/0c/0ce1eec0cc580ce17d377e5ef7c3ca6b4d39abab.svn-base:273:                                                        udp-receiver --nokbd --portbase ${port} --mcast-rdv-address ${storageip} 2>/dev/null | gunzip -f -c 2>/dev/null |  partimage -f3 -b restore $win7rec stdin
/root/svn/0.32/trunk/.svn/pristine/0c/0ce1eec0cc580ce17d377e5ef7c3ca6b4d39abab.svn-base:274:                                                        udp-receiver --nokbd --portbase ${port} --mcast-rdv-address ${storageip} 2>/dev/null | gunzip -f -c 2>/dev/null | partimage -f3 -b restore $win7sys stdin
/root/svn/0.32/trunk/.svn/pristine/0c/0ce1eec0cc580ce17d377e5ef7c3ca6b4d39abab.svn-base:278:                                                        udp-receiver --nokbd --portbase ${port} --mcast-rdv-address ${storageip} 2>/dev/null | gunzip -f -c 2>/dev/null | partimage -f3 -b restore ${part} stdin
/root/svn/0.32/trunk/.svn/pristine/0c/0ce1eec0cc580ce17d377e5ef7c3ca6b4d39abab.svn-base:381:                                                        udp-receiver --nokbd --portbase ${port} --mcast-rdv-address ${storageip} 2>/dev/null | gunzip -f -c 2>/dev/null | partimage -f3 -b restore $part stdin;
/root/svn/0.32/trunk/.svn/pristine/0c/0ce1eec0cc580ce17d377e5ef7c3ca6b4d39abab.svn-base:469:                                                        udp-receiver --nokbd --portbase ${port} --mcast-rdv-address ${storageip} 2>/dev/null | gunzip -f -c 2>/dev/null |  partimage -f3 -b restore $part stdin ;
/root/svn/0.32/trunk/.svn/pristine/0c/0ce1eec0cc580ce17d377e5ef7c3ca6b4d39abab.svn-base:519:                                                    udp-receiver --nokbd --portbase ${port} --mcast-rdv-address ${storageip} 2>/dev/null | gunzip -f -c 2>/dev/null | dd of=${hd}
/root/svn/0.32/trunk/.svn/pristine/24/2461bc1e810a56b21208edfc4164f513270cdba2.svn-base:340:                                                        udp-receiver --nokbd --portbase ${port} --mcast-rdv-address ${storageip} 2>/dev/null | partimage -f3 -b restore $win7sys stdin
/root/svn/0.32/trunk/.svn/pristine/24/2461bc1e810a56b21208edfc4164f513270cdba2.svn-base:342:                                                        udp-receiver --nokbd --portbase ${port} --mcast-rdv-address ${storageip} 2>/dev/null |  partimage -f3 -b restore $win7rec stdin
/root/svn/0.32/trunk/.svn/pristine/24/2461bc1e810a56b21208edfc4164f513270cdba2.svn-base:343:                                                        udp-receiver --nokbd --portbase ${port} --mcast-rdv-address ${storageip} 2>/dev/null | partimage -f3 -b restore $win7sys stdin
/root/svn/0.32/trunk/.svn/pristine/24/2461bc1e810a56b21208edfc4164f513270cdba2.svn-base:346:                                                        #udp-receiver --nokbd --portbase ${port} --mcast-rdv-address ${storageip} 2>/dev/null |  partimage -f3 -b restore ${hd}1 stdin
/root/svn/0.32/trunk/.svn/pristine/24/2461bc1e810a56b21208edfc4164f513270cdba2.svn-base:347:                                                        #udp-receiver --nokbd --portbase ${port} --mcast-rdv-address ${storageip} 2>/dev/null |  partimage -f3 -b restore ${hd}2 stdin
/root/svn/0.32/trunk/.svn/pristine/24/2461bc1e810a56b21208edfc4164f513270cdba2.svn-base:348:                                                        #udp-receiver --nokbd --portbase ${port} --mcast-rdv-address ${storageip} 2>/dev/null | partimage -f3 -b restore $win7sys stdin
/root/svn/0.32/trunk/.svn/pristine/24/2461bc1e810a56b21208edfc4164f513270cdba2.svn-base:352:                                                        udp-receiver --nokbd --portbase ${port} --mcast-rdv-address ${storageip} 2>/dev/null | partimage -f3 -b restore ${part} stdin
/root/svn/0.32/trunk/.svn/pristine/24/2461bc1e810a56b21208edfc4164f513270cdba2.svn-base:467:                                                        udp-receiver --nokbd --portbase ${port} --mcast-rdv-address ${storageip} 2>/dev/null | partimage -f3 -b restore $part stdin;
/root/svn/0.32/trunk/.svn/pristine/24/2461bc1e810a56b21208edfc4164f513270cdba2.svn-base:555:                                                        udp-receiver --nokbd --portbase ${port} --mcast-rdv-address ${storageip} 2>/dev/null |  partimage -f3 -b restore $part stdin ;
/root/svn/0.32/trunk/.svn/pristine/24/2461bc1e810a56b21208edfc4164f513270cdba2.svn-base:605:                                                    udp-receiver --nokbd --portbase ${port} --mcast-rdv-address ${storageip} 2>/dev/null | gunzip -f -c 2>/dev/null | dd of=${hd}
/root/svn/0.32/trunk/src/buildroot/package/customize/fog/scripts/bin/fog:340:                                                                   udp-receiver --nokbd --portbase ${port} --mcast-rdv-address ${storageip} 2>/dev/null | partimage -f3 -b restore $win7sys stdin
/root/svn/0.32/trunk/src/buildroot/package/customize/fog/scripts/bin/fog:342:                                                                   udp-receiver --nokbd --portbase ${port} --mcast-rdv-address ${storageip} 2>/dev/null |  partimage -f3 -b restore $win7rec stdin
/root/svn/0.32/trunk/src/buildroot/package/customize/fog/scripts/bin/fog:343:                                                                   udp-receiver --nokbd --portbase ${port} --mcast-rdv-address ${storageip} 2>/dev/null | partimage -f3 -b restore $win7sys stdin
/root/svn/0.32/trunk/src/buildroot/package/customize/fog/scripts/bin/fog:346:                                                           #       udp-receiver --nokbd --portbase ${port} --mcast-rdv-address ${storageip} 2>/dev/null |  partimage -f3 -b restore ${hd}1 stdin
/root/svn/0.32/trunk/src/buildroot/package/customize/fog/scripts/bin/fog:347:                                                           #       udp-receiver --nokbd --portbase ${port} --mcast-rdv-address ${storageip} 2>/dev/null |  partimage -f3 -b restore ${hd}2 stdin
/root/svn/0.32/trunk/src/buildroot/package/customize/fog/scripts/bin/fog:348:                                                           #       udp-receiver --nokbd --portbase ${port} --mcast-rdv-address ${storageip} 2>/dev/null | partimage -f3 -b restore $win7sys stdin
/root/svn/0.32/trunk/src/buildroot/package/customize/fog/scripts/bin/fog:352:                                                           udp-receiver --nokbd --portbase ${port} --mcast-rdv-address ${storageip} 2>/dev/null | partimage -f3 -b restore ${part} stdin
/root/svn/0.32/trunk/src/buildroot/package/customize/fog/scripts/bin/fog:467:                                                                       udp-receiver --nokbd --portbase ${port} --mcast-rdv-address ${storageip} 2>/dev/null | partimage -f3 -b restore $part stdin;
/root/svn/0.32/trunk/src/buildroot/package/customize/fog/scripts/bin/fog:555:                                                                       udp-receiver --nokbd --portbase ${port} --mcast-rdv-address ${storageip} 2>/dev/null |  partimage -f3 -b restore $part stdin ;
/root/svn/0.32/trunk/src/buildroot/package/customize/fog/scripts/bin/fog:605:                                                   udp-receiver --nokbd --portbase ${port} --mcast-rdv-address ${storageip} 2>/dev/null | gunzip -f -c 2>/dev/null | dd of=${hd}
/root/svn/0.32/trunk/src/buildroot/package/customize/fog/scripts/bin/fog.bkup:271:                                                                  udp-receiver --nokbd --portbase ${port} --mcast-rdv-address ${storageip} 2>/dev/null | gunzip -f -c 2>/dev/null | partimage -f3 -b restore $win7sys stdin
/root/svn/0.32/trunk/src/buildroot/package/customize/fog/scripts/bin/fog.bkup:273:                                                                  udp-receiver --nokbd --portbase ${port} --mcast-rdv-address ${storageip} 2>/dev/null | gunzip -f -c 2>/dev/null |  partimage -f3 -b restore $win7rec stdin
/root/svn/0.32/trunk/src/buildroot/package/customize/fog/scripts/bin/fog.bkup:274:                                                                  udp-receiver --nokbd --portbase ${port} --mcast-rdv-address ${storageip} 2>/dev/null | gunzip -f -c 2>/dev/null | partimage -f3 -b restore $win7sys stdin
/root/svn/0.32/trunk/src/buildroot/package/customize/fog/scripts/bin/fog.bkup:278:                                                              udp-receiver --nokbd --portbase ${port} --mcast-rdv-address ${storageip} 2>/dev/null | gunzip -f -c 2>/dev/null | partimage -f3 -b restore ${part} stdin
/root/svn/0.32/trunk/src/buildroot/package/customize/fog/scripts/bin/fog.bkup:381:                                                                  udp-receiver --nokbd --portbase ${port} --mcast-rdv-address ${storageip} 2>/dev/null | gunzip -f -c 2>/dev/null | partimage -f3 -b restore $part stdin;
/root/svn/0.32/trunk/src/buildroot/package/customize/fog/scripts/bin/fog.bkup:469:                                                                  udp-receiver --nokbd --portbase ${port} --mcast-rdv-address ${storageip} 2>/dev/null | gunzip -f -c 2>/dev/null |  partimage -f3 -b restore $part stdin ;
/root/svn/0.32/trunk/src/buildroot/package/customize/fog/scripts/bin/fog.bkup:519:                                                      udp-receiver --nokbd --portbase ${port} --mcast-rdv-address ${storageip} 2>/dev/null | gunzip -f -c 2>/dev/null | dd of=${hd}

kenneth.sisco

We’re still having trouble narrowing this down, but is it safe to assume that if Multicast is working across the same VLAN that it’s no longer a fog issue?

Sebastian Roth

@kenneth.sisco said:

We’re still having trouble narrowing this down, but is it safe to assume that if Multicast is working across the same VLAN that it’s no longer a fog issue?

I would think so! Looked into igmp settings on your switches yet?

kenneth.sisco

@Sebastian-Roth Yes, we’ve looked at IGMP, but our topology is fairly complex. Currently the network team is working on moving rendezvous points closer to the server/clients and investigating potential issues in NXOS, as we recently migrated from Cisco IOS cores to Nexus.

Unfortunately, my visibility on this is very limited, so I’m doing my best to keep this rolling on the server side as we troubleshoot.

I’ll update with more info later as we progress.

kenneth.sisco

Cool - issue resolved!

This was absolutely an issue on our network, but we’re not sure if it was an old static Rendezvous Point that was configured on our core or if it was our VPC redundancy between our two nexus switches, but we were able to solve it by disabling pim on one of the nexuses and removing that static RP.

Thanks for the help on investigating, everyone. It’s much appreciated.

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