topic Re: SG550x multicast in Wireless

SG550x multicast

3dmaxer — Tue, 28 Nov 2023 12:10:11 GMT

I'm trying to get multicast to work between an SG550x switch and wireless devices connected to an embedded wireless controller setup with multiple 9115 access points. While I can get multicast to work across VLANs on the switch, I can't get multicast on wireless devices to work unless they are on the same subnet.

The SG550x switch does not support IP PIM, and I'm not sure if this is ultimately the key to get this to work or if there are other ways to accomplish this.

I'm doing this in order to get wireless devices such as Sonos speakers and Bonjour printers to work.

Re: SG550x multicast

M02@rt37 — Tue, 28 Nov 2023 12:23:37 GMT

Hello @3dmaxer

IGMP snooping is configured ?

Re: SG550x multicast

3dmaxer — Tue, 28 Nov 2023 13:15:55 GMT

Yes, see below. I have all VLAN snooping set to v3, any thoughts if I need to use v2 for this situation?

ip igmp snooping
ipv6 mld snooping
ip igmp snooping vlan 1
ip igmp snooping vlan 1 immediate-leave
ip igmp snooping vlan 2
ip igmp snooping vlan 2 immediate-leave
ip igmp snooping vlan 3
ip igmp snooping vlan 3 immediate-leave
ip igmp snooping vlan 5
ip igmp snooping vlan 5 immediate-leave
ip igmp snooping vlan 100
ip igmp snooping vlan 100 immediate-leave
ip igmp snooping vlan 3 static 239.0.1.2
ip igmp snooping vlan 1 querier version 3
ip igmp snooping vlan 1 querier
ip igmp snooping vlan 2 querier version 3
ip igmp snooping vlan 2 querier
ip igmp snooping vlan 3 querier version 3
ip igmp snooping vlan 3 querier
ip igmp snooping vlan 5 querier version 3
ip igmp snooping vlan 5 querier
ip igmp snooping vlan 100 querier version 3
ip igmp snooping vlan 100 querier

Re: SG550x multicast

balaji.bandi — Tue, 28 Nov 2023 13:18:28 GMT

have looked the the config suggested by Cisco document :

https://www.cisco.com/c/en/us/support/docs/smb/switches/cisco-small-business-500-series-stackable-managed-switches/smb2907-configuration-of-multicast-router-ports-on-sx500-series-stac.html

Re: SG550x multicast

3dmaxer — Tue, 28 Nov 2023 13:52:10 GMT

Yes, I had this configured for each of the VLANs (1,3,5) for static and selected all the ports that the APs were connected to. Here is that config:

interface vlan 1
name "Main - 10.50.1.x"
ip address 10.50.1.5 255.255.255.0
no ip address dhcp
ip dhcp relay enable
bridge multicast mode ipv4-group
bridge multicast ipv6 mode ip-group
bridge multicast source 10.50.1.6 group 239.1.1.1
bridge multicast forward-all add gi1/0/4,gi1/0/6,gi1/0/9,gi1/0/21
!
interface vlan 3
name "Trusted WIFI (AP1) 10.70.1.x"
ip address 10.70.1.254 255.255.255.0
ip dhcp relay enable
bridge multicast mode ipv4-group
bridge multicast ipv6 mode ip-group
bridge multicast source 10.50.1.6 group 239.1.1.1
bridge multicast forward-all add gi1/0/4,gi1/0/6,gi1/0/9,gi1/0/21
!
interface vlan 5
name "Wireless Devices AP2 - 10.90.1.x"
ip address 10.90.1.254 255.255.255.0
ip dhcp relay enable
bridge multicast mode ipv4-group
bridge multicast ipv6 mode ip-group
bridge multicast source 10.50.1.6 group 239.1.1.1
bridge multicast forward-all add gi1/0/4,gi1/0/6,gi1/0/9,gi1/0/21

Re: SG550x multicast

3dmaxer — Tue, 28 Nov 2023 16:33:26 GMT

When I do a multicast test between two wired devices on VLAN 1 and do a sh ip igmp counters vlan 1, I get the following:

vlan 1
Elapsed time since counters cleared: 48:28:59
Failed received Joins: 0
Total IGMPv1 received messages: 0
Total IGMPv2 received messages: 37364
Total IGMPv3 received messages: 20021
Total invalid received messages: 57385
General Sent Queries: 0
Specific Sent Queries: 0

The invalid receive counter will go up in as my multicast test runs. Does this point to some configuration issue?

Re: SG550x multicast

Rich R — Thu, 30 Nov 2023 00:27:43 GMT

1. Make sure your EWC software is up to date as per TAC recommended (link below) - currently 17.9.4a
https://software.cisco.com/download/home/286322352/type/286323077/release/17.9.4a

2. Check the config guides:
https://www.cisco.com/c/en/us/support/docs/wireless/catalyst-9800-series-wireless-controllers/215352-configure-and-troubleshoot-mdns-on-catal.html (applies to regular WLC but read for reference)
https://www.cisco.com/c/en/us/td/docs/wireless/controller/ewc/17-9/config-guide/ewc_cg_17_9/m_local_area_bonjour_ewc_ap_mode.html (EWC config guide)