Dell PowerConnect 6248 Configuration Guide - Page 157

Multicast Routing and IGMP Snooping, Enable IGMP snooping on VLAN 100.

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Multicast Routing and IGMP Snooping In this example, ports 1/g5 and 1/g10 are members of VLAN 100, and port 1/g15 is a member of VLAN 200. Both VLANs are configured as VLAN routing interfaces and are in different subnets. IGMP snooping is configured on VLAN 100 so that a member port will receive multicast data only if it sends an IMGP join message for that multicast group. IGMP and PIM-DM are enabled on each VLAN so that multicast data sent from a port on VLAN 200 can be routed to VLAN 100. NOTE: If multicast routing and IGMP snooping are configured on the same switch, do not use the commands bridge multicast filtering forward-all or bridge multicast filtering forbidden on the VLAN interfaces. These commands should be used in IGMP Snooping configurations only. 1 Create VLANs 100 and 200. console#configure console(config)#vlan database console(config-vlan)#vlan 100,200 2 Enable IGMP snooping on VLAN 100. console(config-vlan)#ip igmp snooping 100 console(config-vlan)#exit 3 Enable routing on the switch. console(config)#ip routing 4 Configure VLAN 100 as a VLAN routing interface and assign an IP address and subnet mask. console(config)#interface vlan 100 console(config-if-vlan100)#routing console(config-if-vlan100)#ip address 10.10.10.1 255.255.255.0 5 Enable IGMP and PIM-DM on the VLAN routing interface console(config-if-vlan100)#ip igmp console(config-if-vlan100)#ip pimdm NOTE: When you enable PIM-DM on the VLAN routing interface, PIM-SM is automatically enabled. This is a known limitation. Only one multicast routing protocol can be enabled globally on the switch at a time, so the PIM mode that is enabled globally is the PIM mode that is active on the interface. 6 Configure VLAN 200 as a VLAN routing interface and assign an IP address and subnet mask. console(config)#interface vlan 200 console(config-if-vlan200)#routing console(config-if-vlan200)#ip address 20.20.20.1 255.255.255.0 7 Enable IGMP and PIM-DM on the VLAN routing interface console(config-if-vlan200)#ip igmp console(config-if-vlan200)#ip pimdm Multicast 157

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Multicast
157
Multicast Routing and IGMP Snooping
In this example, ports 1/g5 and 1/g10 are members of VLAN 100, and port 1/g15 is a member of VLAN
200. Both VLANs are configured as VLAN routing interfaces and are in different subnets. IGMP
snooping is configured on VLAN 100 so that a member port will receive multicast data only if it sends an
IMGP join message for that multicast group. IGMP and PIM-DM are enabled on each VLAN so that
multicast data sent from a port on VLAN 200 can be routed to VLAN 100.
NOTE:
If multicast routing and IGMP snooping are configured on the same switch, do not use the commands
bridge multicast filtering forward-all
or
bridge multicast filtering forbidden
on the VLAN interfaces. These
commands should be used in IGMP Snooping configurations only.
1
Create VLANs 100 and 200.
console#
configure
console(config)#
vlan database
console(config-vlan)#
vlan
100,200
2
Enable IGMP snooping on VLAN 100.
console(config-vlan)#
ip igmp snooping 100
console(config-vlan)#
exit
3
Enable routing on the switch.
console(config)#
ip routing
4
Configure VLAN 100 as a VLAN routing interface and assign an IP address and subnet mask.
console(config)#
interface vlan 100
console(config-if-vlan100)#
routing
console(config-if-vlan100)#
ip address
10.10.10.1
255.255.255.0
5
Enable IGMP and PIM-DM on the VLAN routing interface
console(config-if-vlan100)#
ip igmp
console(config-if-vlan100)#
ip pimdm
NOTE:
When you enable PIM-DM on the VLAN routing interface, PIM-SM is automatically enabled. This is a
known limitation. Only one multicast routing protocol can be enabled globally on the switch at a time, so the
PIM mode that is enabled globally is the PIM mode that is active on the interface.
6
Configure VLAN 200 as a VLAN routing interface and assign an IP address and subnet mask.
console(config)#
interface vlan 200
console(config-if-vlan200)#
routing
console(config-if-vlan200)#
ip address
20.20.20.1
255.255.255.0
7
Enable IGMP and PIM-DM on the VLAN routing interface
console(config-if-vlan200)#
ip igmp
console(config-if-vlan200)#
ip pimdm