Using a separate NIC for multicast

[MarkG]

I’ve a FOG server on Ubuntu 20.04, latest version of FOG. My server has 3 NICs all connected to the same subnet. I want to use eno2 for imaging and eno3 for Multicast, but I can’t get the multicast bit to work.

I’ve configured my storage node to use eno2 and set the IP address to the IP of eno2 and normal imaging works.

I then went fo FOG Settings->Multicast and set the interface to eno3. But when I start a multicast task the hosts all get stuck at the Partclone screen. I can see from the server logs that FOG is starting the multicast task using eno2.

If I change the config to use eno2 for multicast then my multicast tasks work, but I was hoping to utilise the extra bandwidth of the 3rd ethernet port I feel sure I’ve missed something obvious… but what?

[Sebastian Roth]

@MarkG FOG wasn’t made to be used with several NICs and I don’t think there has been much testing on this kind of setup in the last years.

As far as I remember the multicast network interface is not used from the FOG Settings anymore but dynamically enumerated in the code (1, 2). @Tom-Elliott can tell you more about this I would think.

[MarkG]

@Sebastian-Roth OK thanks for the reply. It’s no biggie but I’ve got all these NICs and nothing to use them for

As an idea, could I create another storage group for the images I might want to multicast, where all the settings except the interface and IP address are the same as the default group? If I set that to use eno3, and multicast to use eno3, that might achieve what I want?

[pep]

@sebastian-roth First forgive my level of English. I have a fog server working with different network cards assigned to different vlans (192.168.1.x, 192.168.2.x etc …) and a single dhcp server giving ips to the different subnets

1- I configured the dhcp with the different vlans and network cards, next-server option etc …
2- I modified the default.ipxe file inside the tftpboot directory by changing:
chain http: // $ {next-server} /fog/service/ipxe/boot.php##params

3- In the Host Kernel Arguments option of each computer I put the parameters that interest me

web = http: //192.168.1.100/fog/ ftp = 192.168.1.100 storage = 192.168.1.100: / images / dev / storageip = 192.168.1.100

Server -> 192.168.1.100

If the computer is in 192.168.2.x and the server 191.168.2.100 it would be
web = http: //192.168.2.100/fog/ ftp = 192.168.2.100 storage = 192.168.2.100: / images / dev / storageip = 192.168.2.100

[MarkG]

@pep said in Using a separate NIC for multicast:

web = http: //192.168.1.100/fog/ ftp = 192.168.1.100 storage = 192.168.1.100: / images / dev / storageip = 192.168.1.100

Thanks! That works. I can leave my storage settings as default and Multticast will use eno2, then for anything not multicast I can set the correct parameters for eno3.

Just a note that for deployment the storage variable needs to be ip.address:/images/ (without the dev/)