Catalyst 1300 igmp querier

[claudio-sinupsi]

Hi,

I'm having trouble configuring the IGMP querier function on a Catalyst switch 1300-48T-4G. It is for IPTV solutions. I must enable the querier on the 1300, where the multicast servers are connected.

• I have enabled it globally and per VLAN;
• The VLAN interface has an IP address;

The symptoms are that no TV channels were distributed or a strong mosaic effect is present.
Maybe, useful notes:

• IPTV VLAN ID is: 260
• The IP Address configured on the VLAN  interface is 10.107.66.1

When I check the status with

show ip igmp snooping interface 260

the output is:

IGMP Snooping is globally enabled
IGMP Snooping Querier is globally enabled
VLAN 260
IGMP Snooping is enabled
IGMP snooping last immediate leave: disable
Automatic learning of Multicast router ports is disabled
IGMP Snooping Querier is enabled
IGMP Snooping Querier operation state: is not running
IGMP Snooping Querier version: 2
IGMP Snooping Querier election is disabled
IGMP Snooping Querier admin address : 10.107.66.1
IGMP Snooping Querier oper address :
IGMP snooping robustness: admin 2 oper 2
IGMP snooping query interval: admin 125 sec oper 125 sec
IGMP snooping query maximum response: admin 10 sec oper 10 sec
IGMP snooping last member query counter: admin 1 oper 2
IGMP snooping last member query interval: admin 1000 msec oper 1000 msec

and with the command

show ip igmp interface Vlan 260

the output is:

vlan 260 is Up
Administrative IGMP status is Down
Operational IGMP status is Down
IGMP Querier IP address is 0.0.0.0
Current IGMP version is 2
Administrative IGMP robustness variable 2
Operational IGMP robustness variable 0
Administrative IGMP query interval is 125 seconds
Operational IGMP query interval is 0 seconds
Administrative IGMP max query response time is 10.0 seconds
Operational IGMP max query response time is 0.0 seconds
Administrative Last member query response interval is 1000 ms
Operational Last member query response interval is 0 ms

I'm sure I'm missing some steps, but I don't know where!

I read documentation many times and more! I need help!

Thanks

[Joseph W. Doherty]

So, you only have one VLAN/subnet?  I.e. no need to multicast route to any other VLANs/subnets?

I ask, because an IGMP querier is normally done by multicast router interface.

[claudio-sinupsi]

Hi Joseph, and thanks for your reply.

I have only one VLAN for Multicast traffic, VLAN id=260. I don't need that traffic to be routed; I need only a querier to manage the query and avoid a Multicast flood.

The function is present, but I can't enable it.

Thanks

[Joseph W. Doherty]

If you have a L3 interface on that subnet, I believe all you should need to do is enable PIM.

[claudio-sinupsi]

I found this on the docs:

ip igmp snooping vlan 260 mrouter learn pim-dvmrp

but there is no effect.

[Joseph W. Doherty]

Is IP routing enabled on the c1300?

If it is, possibly it's considered a logical error to try to enable the standalone IGMP querier, as it's intended, I believe, for when there is no L3 gateway that can provide the service (like if the L3 switch was running in only L2 mode).

[claudio-sinupsi]

According to the official documentation, setting an IP address on an interface (VLAN or loopback) is all that is necessary.

I can't find any other tips on setting up IGMP!

Thanks for your support, Joseph.

[claudio-sinupsi · Accepted solution]

Hi all,
I solved it!
I'm here to share how I configured the Cisco Catalyst 1300 Series (1300-48T-4G) to act as an IGMP Querier and be aware of IPTV Multicast traffic.
As you know, the Catalyst 1300 is not IOS equipment. The System Image version I work with is  4.1.3.36.
Below are the configuration parts involved with IGMP (notes: in mine environment, IPTV VLAN is 260; 10.107.66.1/25 is the IPTV VLAN IP Address):

bridge multicast filtering
ip igmp snooping
ip igmp snooping vlan 260
ip igmp snooping vlan 260 querier
ip igmp snooping vlan 260 querier address 10.107.66.1
no ip igmp snooping vlan 260 querier election

interface vlan 260
 name IPTV
 ip address 10.107.66.1 255.255.255.128
 bridge multicast mode ipv4-group
 ip igmp last-member-query-count 1
 ip igmp version 2

And then, I had to declare the Multicast Group involved

ip igmp snooping vlan 260 static 224.0.5.1
ip igmp snooping vlan 260 static 224.0.5.2
ip igmp snooping vlan 260 static 224.0.5.3
...
ip igmp snooping vlan 260 static 224.0.5.136

Each Multicast IP correspond to a TV Channel.
If anyone comes across this post and needs more details or topology information, I'll be glad to help.
Thanks to all of you here.