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April 25th, 2014 10:00

multicast on general trunk port

I want to have multicast working on 2 ports in my switch.  How can I do this?   It worked until I changed my ports to General to add a tagged vlan to it.  From then on my multicast has stopped working. 

Attached is my config.  g1 and g3 are the ports I want multicast working.  What else to I need to add to get it working? 

Mark

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6 Posts

April 28th, 2014 08:00

I'm running Proxmox virtual servers on both ports 1 and 3.  

I do believe that the multicast would be over vlan 1, but I've added the same multicast IP to vlan 98 as well, and it made no difference.

Before the change, the switch had no configuration - every as default.  

The general mode is working perfectly.  On my Proxmox server I have pfSense for my gateway, and then a few Ubiquity Unifi routers for my wifi networks.  These Unifi have an option for a guest network on a different vlan, so in my pfSense I have the same vlan as the guests network and it works perfectly.

After everything is configured, I want the multicast on Proxmox to be working.  Here are some notes on Proxmox multicast:   pve.proxmox.com/.../Multicast_notes  

The test described there does not work currently.  No multicast response from the next server when using omping server1 server2.

6 Posts

April 28th, 2014 09:00

Thanks about not needing the vlan1 untagged command. I was having problems getting it to work in the beginning, and with that it seemed to work, but might have been cuz I was trying to configure over Web interface as well, and it seems to not support everything.

ssmping seems to be working, but does not have the same 2 line multicast as in the example on that page:  

server output:

# ssmpingd

received request from 10.11.0.200

received request from 10.11.0.200

received request from 10.11.0.200

# asmping 224.0.2.1 10.11.0.201

asmping joined (S,G) = (*,224.0.2.234)

pinging 10.11.0.201 from 10.11.0.200

 unicast from 10.11.0.201, seq=1 dist=0 time=0.205 ms

multicast from 10.11.0.201, seq=1 dist=0 time=0.232 ms

 unicast from 10.11.0.201, seq=2 dist=0 time=0.153 ms

multicast from 10.11.0.201, seq=2 dist=0 time=0.165 ms

 unicast from 10.11.0.201, seq=3 dist=0 time=0.219 ms

multicast from 10.11.0.201, seq=3 dist=0 time=0.243 ms

^C

--- 10.11.0.201 statistics ---

3 packets transmitted, time 2300 ms

unicast:

  3 packets received, 0% packet loss

  rtt min/avg/max/std-dev = 0.153/0.192/0.219/0.030 ms

multicast:

  3 packets received, 0% packet loss since first mc packet (seq 1) recvd

  rtt min/avg/max/std-dev = 0.165/0.213/0.243/0.036 ms

Can I do this change live in production?  or is it best to wait till off hours?

I assume the command would be

interface ethernet 1/g1

switchport access 1

exit

?

Thanks.

6 Posts

April 28th, 2014 11:00

The VLAN 98 is needed.  I have pfSense on that VLAN directly communicating to wifi guests clients, but it's not critical, so I can take it off for a while.

6 Posts

April 28th, 2014 15:00

I made that change, but it did not bring up the proxmox sync yet, until I restarted several services.  Now I switched back to general mode with vlan and it stays up.  

I'll keep you posted if I have issues.

6 Posts

April 29th, 2014 08:00

Everything seems to be working, so I guess it was not really the config in the switch, but rather the system needing some services restarted.

Thanks.

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