Multicast problem with dynamically created vlans

htw — Thu, 11 Oct 2018 16:14:00 GMT

Hi,
following scenario:
- two AccessSwitchstacks X450-G2 (22.4), each connected with an MLAG to a pair of Summit X620 Distributionswitches. (X450 <=> X620 <=> X450)
- VLAN A is configured in all Switches
- VLAN B is configured in X620 and dynamically created (via Netlogin) in X450 (f.e. SYS_VLAN_123)

In VLAN B Multicast-using devices (Bonjour in this case) can not see each other if they are not on the same access switch.

Using "show mcast cache" I see the Uplink Port towards the distribution switch (port 1:49) is only shown in configured VLANs and not in dynamically created VLANs.
f.e. configured VLAN A :
snoop 224.0.0.18 172.16.128.3 43 A
Vlan Port Vid
A 1:22 1460
1:23 1460
2:34 1460
2:38 1460
1:49 1460dynamically crated VLAN B (1155):
snoop 224.0.0.1 141.45.139.151 81 SYS_VLAN_1155
Vlan Port Vid
SYS_VLAN_1155 1:23 1155
1:24 1155
2:3 1155
2:4 1155Everything is tagged on Uplink Ports. So I think we have a problem with Multicast packets over Uplinks in dynamically created VLANs. The Switches are running Multicast default configuration. Is there something I have to configure für dynamic VLANs?

RE: Multicast problem with dynamically created vlans

Ronald_Dvorak — Thu, 11 Oct 2018 16:20:00 GMT

no idea but could it be this !?

https://documentation.extremenetworks.com/exos_commands_22.3/exos_21_1/exos_commands_all/r_configure...

RE: Multicast problem with dynamically created vlans

htw — Thu, 11 Oct 2018 16:24:00 GMT

Yes, this is the method we use to add dynamically created VLANs to our Uplink Portsshow config vlan
...
configure vlan dynamic-vlan uplink-ports add ports 1:49And those VLANs are affected with our multicast problems.

topic RE: Multicast problem with dynamically created vlans in ExtremeSwitching (EXOS/Switch Engine)

Multicast problem with dynamically created vlans

RE: Multicast problem with dynamically created vlans

RE: Multicast problem with dynamically created vlans