configure forwarding ipmc lookup-key
Description
Enables you to choose the lookup-key for multicast forwarding.
Syntax Description
group-vlan | Specifies that IP multicast forwarding database entries are programmed as (*,GroupIP,VlanId). |
source-group-vlan | Specifies that IP multicast forwarding database entries are programmed as (SourceIP, GroupIP, VlanId). (Default). |
mac-vlan | Specifies that IP multicast forwarding database entries are programmed as (Mac, VlanId). |
mixed-mode | Specifies that IP multicast forwarding database entries are programmed as follows: L3 cache entries (PIM/MVR/PVLAN) use source-group-vlan; L2 cache entries (IGMP/MLD/PIM snooping) use mac-vlan. |
Default
source-group-vlan.
Usage Guidelines
Use this command to choose the lookup-key for multicast forwarding. The following restrictions apply to this command:
- If IPMC forwarding is enabled on at least on one VLAN
- If MVR is enabled either globally or on a VLAN
Similarly, enabling the above two features are disallowed,when the ipmc lookup-key is mac-vlan. The following warning message is displayed when the mac-valn option is specified:
Warning: Usage of multicast IP addresses that could result in overlapping MAC addresses should be avoided. Example: Using 225.1.1.1, 226.1.1.1 and 225.129.1.1 should be avoided. Either one of the addresses could be used. Using multicast with PVLAN should be avoided with this forwarding option.
- Mixed-mode: configure forwarding ipmc lookup-key mixed-mode
- The configure igmp snooping forwarding-mode [group-vlan | source-group-vlan] command was introduced to support (*, G, V) forwarding before the IPMC compression feature was introduced. Because we are introduced IPv6 multicast support in ExtremeXOS 15.2, this command is deprecated, and the new configure forwarding ipmc lookup-key command now covers both IPv4 and IPv6.
Warning: Usage of multicast IP addresses that could result in overlapping MAC addresses should be avoided for snooping (IGMP/MLD/PIM snooping) controlled traffic.Example: Using 225.1.1.1, 226.1.1.1 and 225.129.1.1 should be avoided. Either one of the addresses could be used.
Example
The following command specifies that IP multicast forwarding database entries are programmed as (*,GroupIP,VlanId):
configure forwarding ipmc lookup-key group-vlan
To display the ipmc lookup-key configuration, enter the command:
show forwarding configuration
History
This command was first available in ExtremeXOS 15.3.
Platform Availability
This command is available on ExtremeSwitching X435, X440-G2, X450-G2, X460-G2, X465, X590, X620, and X695 series switches.