Multicast configuration driving me nuts

[dtdamen]

Hi guys,
we`ve got Philips TVs installed for streaming servics in a hospital but unfortunately I´m not the specialist for MC. Maybe someone can assist me

I´ve a created a Vlan 422 for Philips TVs. The Vlan 422 has got a an IP address (10.128.44.1/23) on my 6900 core switch. All TVs are receiving DHCP address from a DHCP server. (range = 10.128.44.10-250). VLAN 422 is also configured on both 6560 switches and is tagged to core.

Stream Server ---------> 6560 ----------------> 6900 --------->6560 -------- Philips TV

On 6900 I´ve done the following configuration
ip multicast admin-state enable
ip multicast vlan 422 admin-state enable
ip multicast vlan 422 querying enable
ip multicast vlan 422 spoofing enable
ip multicast vlan 422 zapping enable
ip multicast vlan 422 querier-forwarding enable
ip multicast vlan 422 flood-unknown enable

On both 6560 I´ve configured:
ip multicast admin-state enable
ip multicast vlan 422 admin-state enable
ip multicast vlan 422 querying enable
ip multicast vlan 422 spoofing enable
ip multicast vlan 422 querier-forwarding enable

But I do not receive any TV channel from Stream server, only a few undefined pictures

When I try "sh ip multicast forward" on core switch is does not show me any entry, also when I try "show ip multcast group"

What is wrong in my configuration?

Thanks a lot for any assistance
Thomas

[Cristek]

Same as you, I am not an MC expert, but I'm trying to learn more about it and also get some experience on it.
I'll use this thread to learn as well. With this in mind, see if this helps in any way:

I'm assuming the TVs are receiving the correct IP from the correct DHCP server which means your vlan configuration is most likely correct.
What is the IP address of your multicast server? And what multicast address are you trying to stream from? I'd start with this:

- use v3 instead of v2 just in case with "ip multicast version 3" on all switches
- remove "ip multicast vlan 422 querying enable" from the edge and only let it in your core switch
- remove "ip multicast vlan 422 spoofing enable" since it replaces the client mac/ip with the switch's mac/ip (maybe the server is expecting to see all clients?)
- add "zapping" and "flood-unknown" on all edge switches as well

Now, on a 6360 what's the output of "show ip multicast querier" and "show ip multicast group"?

[dtdamen]

Hi guys,
got it running

On 6900 Core:

ip multicast admin-state enable
ip multicast querying enable
ip multicast zapping disable
ip multicast version 2
ip multicast robustness 5
ip multicast proxying enable
ip multicast querier-forwarding enable
ip multicast vlan 422 admin-state enable
ip multicast vlan 422 querying enable
ip multicast vlan 422 zapping disable
ip multicast vlan 422 proxying enable
ip multicast vlan 422 querier-forwarding enable

On 6560 Edge switch:
ip multicast admin-state disable
ip multicast querying enable
ip multicast spoofing enable
ip multicast zapping enable
ip multicast querier-forwarding enable
ip multicast vlan 422 admin-state enable
ip multicast vlan 422 querying disable
ip multicast vlan 422 zapping enable
ip multicast vlan 422 flood-unknown enable

No idea why I`ve to disable ip multicast global on edge switch and only activate for VLAN 422 but that configuration works.

Thanks
Thomas

[silvio]

Hi Thomas,
strange behavior. I have no idea for the reason.
Normaly you need the following config for MC-switching (within same vlan):

at all switches:
ip multicast admin-state enable
ip multicast querier-forwarding enable

at core (with ip in the vlans):
ip multicast querying enable

This commands are for improving in special cases (not real necessary):
ip multicast zapping disable
ip multicast proxying enable

You can configure all the commands per vlan - but I prefere it globally.
For the troubleshooting:
show ip multicast querier (all switches should see in the vlans the ip of the core as querier, the core should show CPU for itself)
show ip multicast group (shows the mc receivers)
show ip multicast source (the streamer)
show ip multicast forward (the connection from streamer to receiver)

The last 3 commands are not really showing output at the 6360/6560/6465 (depends at hardware):
check there with:
show ip multicast bridge ... and bridge-forward

BR Silvio

[dtdamen]

Hi Silvio,
the command sh ip multicast qtryuerier on my 6560 Edge switch does not show me any information
Total 0 Queriers

Host Address Vlan/Service Interface Static Count Life
---------------+--------------+----------------------+-------+------+-----

sh ip multicast group
* Denotes IPMVLAN/RVLAN

Group Address Source Address Vlan/Service Interface Mode Static Count Life
---------------+---------------+--------------+----------------------+--------+-------+------+-----

sh ip multicast source
Total 0 Sources

Source Ingress
Group Address Host Address Tunnel Address Vlan/Service
---------------+---------------+---------------+--------------

sh ip multicast bridge
Total 0 Bridge Entries


* Denotes IPMVLAN

Vlan/Service Type Group Address Host Address Action UpTime
--------------+------------+-----------------+-----------------+------------+-----------

But any time when I enable ip multcast on the edge switch globally the TV picture disappears immediately

Regards,
Thomas

[silvio]

are you shure that mc is enabled at this switch too?
Very strange that there is absolutely no output in no vlan.
Do you see a querier in any other of your switches?

[dtdamen]

Hi Silvio,
here is my current configuration

Stream-Server -------> 6560-1------->6900--------->6560-2--------TV-Device

Stream server has untagged port in VLAN 422 on Switch 6560-1, TV device has untagged port in VLAN 422 on switch 6560-2

[Configuration on Switch 6560-1
ip multicast admin-state disable
ip multicast querying disable
ip multicast zapping enable
ip multicast vlan 422 admin-state enable
ip multicast vlan 422 querying enable
ip multicast vlan 422 zapping enable
ip multicast vlan 422 querier-forwarding enable
ip multicast vlan 422 flood-unknown enable

Configuration on Core Switch 6900
ip multicast admin-state enable
ip multicast querying disable
ip multicast zapping enable
ip multicast version 2
ip multicast robustness 5
ip multicast proxying enable
ip multicast querier-forwarding enable
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


Configuration on Switch 6560-2
ip multicast admin-state disable
ip multicast querying enable
ip multicast spoofing enable
ip multicast zapping enable
ip multicast querier-forwarding enable
ip multicast vlan 422 admin-state enable
ip multicast vlan 422 querying disable
ip multicast vlan 422 zapping enable
ip multicast vlan 422 flood-unknown enable


Regs,
Thomas

[silvio]

on both 6560 mc is disabled. So that is the reason for no output.

[dtdamen]

Hi Silvia,
yes`you´re correct. I´ve just enabled mc globally on both switches and now I can see output for sh ip multicast querier.
But for the real function it doesn´t matter, I receive a picture on my TV screen.
Is that because I´ve configured mc in the vlan

Thanks
Thomas

[dtdamen]

Update:
I`ve enabled mc on both edge switches (recommended by Sylvio) but after a couple of seconds the TV pictures disappeared.
After I`ve disabled mc again on both switches the picture came back.

This system is driving me crazy

Thomas