Disabling ''igmp snooping'' in a VLAN (no interface VLAN) on Catalyst 6500

[guillermo.ruiz]

Can please some help?

On 4948 or 3560 I can disable igmp snooping in a specific VLAN:

sw4948(config)#no ip igmp snooping vlan ?

  <1-1001>     Vlan number

  <1006-4094>  Vlan number

sw4948(config)#no ip igmp snooping vlan 10 ?

  explicit-tracking           Enable IGMP explicit host tracking

  immediate-leave             Enable IGMPv2 immediate leave processing

  last-member-query-interval  Last member query interval

  mrouter                     Configure an L2 port as a multicast router port

  static                      Configure an L2 port as a member of a group

  <cr>

BUT, in 6509-E this command is not enabled:

sw6509(config-if)#no ip igmp snooping ?   

  access-group  IGMP group access group

  limit         IGMP limit

I have just found on my 6509 that I can disable igmp snooping in a SVI interface (Interface VLAN)

sw6509(config)#int vlan 20

sw6509(config-if)#no ip igmp snooping ?

  access-group                IGMP group access group

  fast-leave                  Enable IGMP fast leave processing

  last-member-query-interval  Configure IGMP leave query timeout

  limit                       IGMP limit

  minimum-version             Minimum IGMP version

  mrouter                     Configure an L2 port as a multicast router port

  querier                     Enable IGMP querier processing

  report-suppression          Force a report suppression

  ssm-safe-reporting          Enable SSM Safe Reporting

  static                      Configure an L2 port as a member of a group

  <cr>

My current 6509-E IOS version is:

System image file is "sup-bootdisk:s72033-advipservicesk9_wan-mz.122-33.SXH8b.bin"

Do I need to upgrade my IOS version?... or how can I disable ''igmp snooping'' per specific VLAN (no Interface VLAN)?

Any help would be apreciated !

Regards

guruiz

[guillermo.ruiz]

I made a mistake on the copy and paste. Correct info must be as follows:

.

.

BUT, in 6509-E this command is not enabled:

sw6509(config)#no ip igmp snooping ?

cgmp                 configure CGMP option

l2-entry-limit       limit on the l2 entry that can be installed by IGMP snooping

limit                 Configure IGMP Snooping limits

source-only-learning source-only gce entries

Any ideas?

Thanks,

guruiz

[Reza Sharifi]

It is not your IOS. The command is only available under the SVI and not just for layer-2 vlan or can be enabled globally.

Here is an example from the SXI release:

http://www.cisco.com/en/US/docs/switches/lan/catalyst6500/ios/12.2SX/configuration/guide/snooigmp.html#wp1121158

HTH

[guillermo.ruiz]

Reza,

Thank you much for your answer.

Just a pair of questions, if you could please give your comments:

So, to disable igmp snooping in some VLANs in the 6509, do I need to disable it globally?

Would it be the only way?

How could "no ip igmp snooping" applied globally impact my 6509 switch?

Thanks,

Kind regards,

guruiz

[Reza Sharifi]

Hi Guruiz,

So, to disable igmp snooping in some VLANs in the 6509, do I need to disable it globally?

Would it be the only way?

That appears to be the only way. If you have an SVI for the vlan you want to run Multicast in, then simply enable PIM and not worry about IGMP snooping.  I think, the reason you don't see this command under the layer-2 vlan is because most of the time the 6500 is used as layer-2/layer-3 and not just layer-2.

How could "no ip igmp snooping" applied globally impact my 6509 switch?

It will impact only the vlans that are running Multicast.  In general, ip IGMP snooping is used when you have a flat vlan and no SVI.  If you have multiple vlans and are running Multicast between them, then you can just enable PIM.

HTH

[guillermo.ruiz]

Reza,

Fantastic information.

I´m very grateful.

Best regards,

guruiz

[Muhammad Anser Khan]

Hi Raza,

Just to clarify, What is the impact If I disable IGMP Snooping disabled globally and enable on specific SVI? e.g

Config# no ip igmp snooping

Config# inter vlan 1

Config-if)#ip igmp snooping

And What is the impact If I disable IGMP Snooping Querier globally and enable on specfic SVI?

Config# no ip igmp snooping querier

Config# inter vlan 1

Config-if)#ip igmp snooping querier

Will IGMP snooping & Querier work for specific VLAN only If disabled globally?

Regards,

Anser

[nlduarteh]

You can disable igmp in one vlan with the next command:

config# vlan configuration "#vlan"

            no ip igmp snooping