Hello,
AOS 8.4. (C-build)
This may not be a controller problem, but I'm wondering if the symptoms are indicative of a particular issue that might be recognised by someone.
We have a client VLAN which is used for clients on eduroam, we are running a test VAP which dumps us onto this VLAN - when we disable 'broadcast filter all' on this VAP and run an Apple TV simulator on a couple of our devices to screenshare onto we can see these devices on the network from the iPhone we want to mirror from, and can screenshare to them. When we turn broadcast filter back on then the 'AppleTV' devices are no longer even seen by the device we are attempting to mirror from (as you'd expect).
However we also have another testing VLAN, when we configure our VAP to use this VLAN instead of the eduroam VLAN we don't get the same result - we can see other devices (so at some level multicast seems to be working) but when we actually try to connect to them to screenshare the connection fails, it just times out.
So clearly this points to some difference between the two VLANs but I'm strugglng to find what it is.
IGMP is turned off on both VLANs on the controllers - but is on by default on the Cisco Nexus 9ks that the controllers are connected to. Turning IGMP proxy on on the VLAN (on the controllers) makes no difference.
The only difference _on the routers_ that I see between the VLANs as far as IGMP goes is in the output of 'show ip igmp snooping vlan ...'. For the VLAN where multicast doesn't work properly the output is:
Global IGMP Snooping Information:
IGMP Snooping enabled
Optimised Multicast Flood (OMF) enabled
IGMPv1/v2 Report Suppression enabled
IGMPv3 Report Suppression disabled
Link Local Groups Suppression enabled
IGMP Snooping information for vlan 600
IGMP snooping enabled
Lookup mode: IP
Optimised Multicast Flood (OMF) enabled
IGMP querier none
Switch-querier disabled
IGMPv3 Explicit tracking enabled
IGMPv2 Fast leave disabled
IGMPv1/v2 Report suppression enabled
IGMPv3 Report suppression disabled
Link Local Groups suppression enabled
Router port detection using PIM Hellos, IGMP Queries
Number of router-ports: 1
Number of groups: 0
VLAN vPC function enabled
Active ports:
Po11 Po160 Po401
Report Flooding: Disabled
Interfaces for Report Flooding: n/a
Use Group Address for Proxy Leaves: no
On the VLAN where multicast is working the only difference in the above output is 'Number of groups: 1' (instead of '0'). That might be a complete irrelevance but I thought I'd mention it.
Does anyone recognise the symptom of being able to see the other devices, but not being able to connect to them?
Thanks,
Guy