Re: basic multicast query

Dear All,

I have a below query related to Basic (Server to Server) multicast within
the same subnet and vlan but connected to two different switches.

Below is the scenario:

In N5K = Acting as a layer 2 and "ip igmp snooping" is enabled
In Dist_CAT65K= Acting as a layer 2 for Vlan1 and "no ip igmp snooping"
configured (disabled)
In Core_CAT65K= Acting as a layer 3 for Vlan1 (SVI) and "no ip igmp
snooping" configured (disabled)

Server-1 ---> N5K-1 ---> Dist_CAT65K-1 ---> "Core_CAT65K-1 <<====>>
Core_CAT65K-2" <--- Dist_CAT65K-2 <---- N5K-2 <----- Server-2

Kindly suggest what is the best way to enable multicast end to end.

I have one solution to enable 'pim' under SVI in the core switch:

Core_CAT65K:
!
interface Vlan1
 ip address 1.1.1.1 255.255.255.0
 ip pim sparse-dense-mode
end
!

To enable 'pim,' Do we need to enable "ip multicast-rouing"?

Do we need to enable "ip igmp snooping" in Core_CAT65K?

Is it better to enable "ip igmp snooping" in Dist_CAT65K?

Or Multicast will still work without doing anything because IGMP is
disabled on Core_CAT65K & Dist_CAT65K and Multicast packets will be
treated as Broadcast in Core_CAT65K?

What is the best way?

Thanks

On Thu, Jan 2, 2014 at 1:46 PM, Tony Singh <mothafungla_at_gmail.com> wrote:

> +1 Anthony enabled by default
>
> +1 for Christian enabling querier is when we don't have a PIM interface
> and where we don't need to route our multicast traffic rather it is
> switched instead
>
> IGMP v1v2 support and it's disabled where the corresponding SVI has PIM
> enabled or if IGMP snooping is explicitly disabled on the vlan.
>
>
> http://www.cisco.com/en/US/docs/switches/lan/catalyst3560/software/release/12.2_52_se/configuration/guide/swigmp.html#wp1193337
>
> --
> BR
>
> Tony
>
>
> > On 2 Jan 2014, at 06:24, Anthony <anthonybonilla.ccie_at_gmail.com> wrote:
> >
> > Wouldn't IGMP snooping take care of it by itself?
> >
> > Sent from my iPhone
> >
> >> On Jan 2, 2014, at 12:00 AM, Imran Ali <immrccie_at_gmail.com> wrote:
> >>
> >> Hi team ,
> >>
> >> if we have multicast clients and server on same vlan , the set up is
> >> going to work ? without using.
> >> advance config like MVR ?
> >>
> >> i know we can use broadcast , but the app is tuned to send muticast
> >> traffic . .
> >>
> >> will the tree S,G can receive on same SVI and flood it back to same
> >> vlan ?
> >>
> >>
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>
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>
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Received on Thu Jan 02 2014 - 14:05:36 ART