Sorry, this took so long to post, but I have found the fix. The issue was that we had storm-control broadcast, storm-control unicast, and storm-control multicast levels set to low on our core switch (layer 3 switch where the routing happens). I removed these and all is well. I appreciate all the help you all supplied.

Sorry, this took so long to post, but I have found the fix. The issue was that we had storm-control broadcast, storm-control unicast, and storm-control multicast levels set to low on our core switch (layer 3 switch where the routing happens). I removed these and all is well. I appreciate all the help you all supplied.

Okay, so I moved the PC I was trying to image to the same VLAN as the FOG server and there is no phone issue. So do you think if I change some QOS around in my switch to prioritize phone traffic it will fix the issue?

I am going to try and reach out to our rep from the company that manages some of our core switches. Hopefully he can provide some info on the current QOS settings. I will post what I hear from him.

Thanks for your help,
Matt

Okay I will give that a try tomorrow and see what happens.

Here are the QOS settings that are currently on the routing switch.

mls qos map cos-dscp 0 8 16 24 32 46 48 56
mls qos srr-queue input bandwidth 70 30
mls qos srr-queue input threshold 1 80 90
mls qos srr-queue input priority-queue 2 bandwidth 30
mls qos srr-queue input cos-map queue 1 threshold 2 3
mls qos srr-queue input cos-map queue 1 threshold 3 6 7
mls qos srr-queue input cos-map queue 2 threshold 1 4
mls qos srr-queue input dscp-map queue 1 threshold 2 24
mls qos srr-queue input dscp-map queue 1 threshold 3 48 49 50 51 52 53 54 55
mls qos srr-queue input dscp-map queue 1 threshold 3 56 57 58 59 60 61 62 63
mls qos srr-queue input dscp-map queue 2 threshold 3 32 33 40 41 42 43 44 45
mls qos srr-queue input dscp-map queue 2 threshold 3 46 47
mls qos srr-queue output cos-map queue 1 threshold 3 4 5
mls qos srr-queue output cos-map queue 2 threshold 1 2
mls qos srr-queue output cos-map queue 2 threshold 2 3
mls qos srr-queue output cos-map queue 2 threshold 3 6 7
mls qos srr-queue output cos-map queue 3 threshold 3 0
mls qos srr-queue output cos-map queue 4 threshold 3 1
mls qos srr-queue output dscp-map queue 1 threshold 3 32 33 40 41 42 43 44 45
mls qos srr-queue output dscp-map queue 1 threshold 3 46 47
mls qos srr-queue output dscp-map queue 2 threshold 1 16 17 18 19 20 21 22 23
mls qos srr-queue output dscp-map queue 2 threshold 1 26 27 28 29 30 31 34 35
mls qos srr-queue output dscp-map queue 2 threshold 1 36 37 38 39
mls qos srr-queue output dscp-map queue 2 threshold 2 24
mls qos srr-queue output dscp-map queue 2 threshold 3 48 49 50 51 52 53 54 55
mls qos srr-queue output dscp-map queue 2 threshold 3 56 57 58 59 60 61 62 63
mls qos srr-queue output dscp-map queue 3 threshold 3 0 1 2 3 4 5 6 7
mls qos srr-queue output dscp-map queue 4 threshold 1 8 9 11 13 15
mls qos srr-queue output dscp-map queue 4 threshold 2 10 12 14
mls qos queue-set output 1 threshold 1 100 100 50 200
mls qos queue-set output 1 threshold 2 125 125 100 400
mls qos queue-set output 1 threshold 3 100 100 100 400
mls qos queue-set output 1 threshold 4 60 150 50 200
mls qos queue-set output 1 buffers 15 25 40 20
mls qos

@george1421

We are using a layer 3 CISCO 3750X IOS 12.2(58) SE2 for routing and yes it is our connection to our ISP.

@george1421

I appreciate your help so ask anything you need to.

Basically all I do is manually boot the PC to the PXE Menu and select deploy image. I select the image I want and then it starts. I have only done this one PC at a time.

@george1421

I believe I am using multicast. I only see multicast settings when I am looking at the FOG Configurations and to my knowledge I have not enabled unicast. Is multicast the default?

We have around 4000 devices that are connected the network, but only 1500 of those would need access to the FOG Server.

@george1421

I believe I am using multicast. I only see multicast settings when I am looking at the FOG Configurations and to my knowledge I have not enabled unicast. Is multicast the default?

No the phones are on a separate subnet all their own.

We are using a CISCO 3750X IOS 12.2(58) SE2

No our PBX is located at our ISPs location.

@Jaymes-Driver

No the TFTP server for the phone system is not on the same VLAN as the the FOG server.

Our network is made up of mostly Cisco 2960s running a mix of IOS 15.0 (2) SE10 and IOS 12.2 (55) SE5. Our only layer 3 switch is a 3750X IOS 12.2 (58) SE2.

We used to outsource all of our switch management, but recently downsized that contract so they only manage a few of the core switches. I have access to all of them, but I am not sure exactly what to look for.

@Jaymes-Driver

Sorry about the blank post.

They are on their own VLAN. I am not sure if it matters, but in the DHCP Scope options the scope for the phone VLAN is using option 150 to point to the tftp server where the config files are stored and the other scopes are using option 66 and 67 to point the PCs to the FOG server.

Sorry about the blank submission. I am new to FOG and to the forum, so please forgive any noob mistakes I am bound to make.

FOG Version: 1.3.4
SVN Revision: 6064
OS: Ubuntu 16.10

Network info:
Fog Server is on VLAN 2
The PCs I have tried to image are on VLAN4

I have recently setup a FOG Server, which went pretty smoothly. The trouble started when I tried to deploy an image to one of the clients. When every the imaging process is running it cause our VoIP phone system to cut in and out. The connection is never dropped, but it makes for a very choppy conversation. I have tried deploying different images and both cause the same problem. I think what is occurring is that the multicast is flooding the VLAN, which in turn causes my phone issue. I found this on the forum -> https://forums.fogproject.org/topic/332/multicast-session-flooding-vlan
I check our layer 3 switch and ip igmp snooping had been disabled, so I enabled it and the cutting out is noticeably better but no gone completely. This post also led me to this -> https://wiki.fogproject.org/wiki/index.php?title=Cisco_Multi_Cast
I am only slightly familiar with CISCO IOS, so this is a bit over my head. I can follow the commands, but my issue is that my network has over 2000 devices and I cannot enter these commands for every PC on every VLAN.

Any help would be appreciated!