Introduction, Recommended solution | Fujitsu BX600 SB9 specification

White Paper ⏐ Issue: October 2006 ⏐ Integration of BX600 SB9 Switches in Cisco Networks

Page 32 / 47

Step 3: Verify the configuration

show link state

! Shows information about configured Link State Groups

3 Basic Multicast Services

3.1Introduction

IP Multicast applications are common to many datacenter networks. At least the deployment software for the blade server often uses multicast to deploy multiple servers using one data stream. In most Cisco networks, the SB9 will act as a Layer 2 switch which has to perform IGMP snooping in order to avoid unnecessary multicast traffic at ports that are not interested in this traffic.

3.2Recommended solution

It is advisable to enable IGMP snooping over the whole broadcast domain and therefore at all switches. To get IGMP snooping running you will need one IGMP querier per VLAN. In most cases there will be a Layer 3 switch in each VLAN which is also the unicast router for that VLAN.

We recommended you to configure this router for multicast routing and enable a IGMP querier in this way, because the multicast router will need the IGMP information anyway. At the SB9 and at all other L2 switches, you only need to enable IGMP snooping.

3.3Configuration

The following steps are necessary to set up IGMP snooping:

∙1. Enable multicast routing and IGMP at the layer 3 switch

∙2. Enable IGMP snooping at all layer 2 switches

∙3. Verify the configuration

1.Enable multicast routing and IGMP at the layer 3 switch

!Layer 3 Switch Configuration

!============================

!In this example PIM dense mode is activated since this is the

!most simple solution. In datacenter networks a more sophisticated solution

!should be used but multicast routing is not in the scope of this document.

ip multicast-routing distributed

interface Vlan1

ip address 10.222.0.1 255.0.0.0 ip pim dense-mode

interface Vlan10

ip address 192.168.10.1 255.255.255.0 ip pim dense-mode

interface Vlan20

ip address 192.168.20.1 255.255.255.0 ip pim dense-mode

2. Enable IGMP snooping at all Layer 2 switches

!Layer 2 Switch Configuration (Cisco)

!All these commands are enable by default and are not seen in the config normally

!Enable IGMP snooping global

ip igmp snooping

!Enable IGMP snooping for VLANs ip igmp snooping vlan 1

ip igmp snooping vlan 10 ip igmp snooping vlan 20

!SB9 Switch Configuration

! Enable IGMP snooping global