Multicast configuration driving me nuts

[silvio]

Hi Thomas,
I hope you see the IP of the 6900 as querier in Vlan 422 in both 6560 (if mc is enabled).
With mc disabled the mc streams are flooded at all ports within vlan 422. So that is no good idea for a lot of tv streams.

if MC is enabled - and at the tv the mc stream is after that requested (f.e. change the channel):
> show ip multicast bridge or group
At the 6560-2 (with the receiver attached) you should see the ports with the tv receiver within vlan 422 - and the joined mc group (tv stream).
At the 6560-1 and 6900 you should see the same (but now the uplinks to 6560-2).

> show ip multicast source (at 6900) should show the direction to the tv streamer.
but for this you need at the 6560-1 - multicast and multicast querier-forwarding enabled

> forward / bridge-forward - shows the stream from source to receivers (not so good visible at 6560)

[silvio]

last week I have heard from a customer that it worked correctly after he disabled MC globaly and enabled it only for the specific vlan (ip multicast vlan 422.....).
If you enable it and you check the mc group you should see a timer (starts with 260 sec.). If this timer is counts down to 0 the streams are gone. That is the reason for a querier. So my question again: do you see a querier at the 6560?

[dtdamen]

Hi Silvio,
when I´ve mc globally disabled on my 6560 I do not see any entry for a querier. But everything works fine.
Any time when I enable it globally on the 6560 the TV picture disappears.

Thomas

[silvio]

I have understand it. But this isn't a good solution ... all MC traffic will be flooded with mc disabled. So it is better to find the reason why it don't work with mc enabled.

[dtdamen]

Hi Silvio,
have you got a mc configuration that is working for a single vlan ? Can you see any failure in my configuration on core and edge ?

Thomas

[silvio]

Hi Thomas,
like I have written in my first post here (and very often at other posts):
# at all switches enable mc and mc querier-forwarding
# at the core you need an ip in that vlan and querier enabled
You can do all of it globally (my recommendation) or per vlan.
BR Silvio

[dtdamen]

Hi Silvio,
will change the configuration as recommended and will post result

Thanks
Thomas

[dtdamen]

Hi Silvio,
here is my running configuration. My preferred way is mc per vlan.

On Core Switch
ip interface "TelevisTV" address 10.128.44.1 mask 255.255.254.0 vlan 422 ifindex 422
vlan 422 members linkagg 1-2 tagged (linkagg to edge switches)
ip multicast vlan 422 admin-state enable
ip multicast vlan 422 querying enable
ip multicast vlan 422 zapping enable
ip multicast vlan 422 proxying enable
ip multicast vlan 422 querier-forwarding enable

On both 6560
vlan 422 members linkagg 1 tagged (linkagg to Core switch)
ip multicast vlan 422 admin-state enable
ip multicast vlan 422 querying disable
ip multicast vlan 422 zapping enable
ip multicast vlan 422 querier-forwarding enable
ip multicast vlan 422 flood-unknown enable

TV picture is ok. But still no output with "sh ip multicast querier"

Thanks
Thomas