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IGMP Snooping configuration for Multicasting on Cisco Catalyst 3020

Hi Guru,

Our switch model is "Cisco Catalyst Blade Switch 3020 for HP"

We are building HA (High Availability) Databases infrastructure.

Currently, there are two nodes(hosts- servers) and two above switch for HA.

Oracle said we need to turn off the IGMP Snooping in order to use the multicasting for their interconnect communication.

So my question is:

Q1> Is there any way to use Multicasting without turning off IGMP Snooping on Switch side?

Q2> If 'yes', how can we configure the switch for Multicasting ?

Oracle uses 230.0.1.0 & 224.0.0.251 IPs with 42000 range port for Multicasting communication.

Please shed some light on it

Thanks.

1 REPLY
Cisco Employee

IGMP Snooping configuration for Multicasting on Cisco Catalyst 3

Hello Justin,

if they are recommending you turn off IGMP there is a possibility the hosts don't send igmp joins. Can you please check if that's the reason for disabling snooping. Without snooping enabled, you basically flood mcast even if joins are not received.

Fabienne

TAC

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