configure forwarding ipmc lookup-key

configure forwarding ipmc lookup-key [group-vlan | source-group-vlan | mac-vlan | mixed-mode]

Description

Enables you to choose the lookup-key for multicast forwarding.

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.

source-group-vlan.

Use this command to choose the lookup-key for multicast forwarding. The following restrictions apply to this command:

The configure forwarding ipmc lookup-key mac-vlan command is disallowed under the following conditions.

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
After enabling this mode, if a new member with unsupported chipset joins, then that card will be failed. The following warning message is displayed when the “mixed-mode” option is specified:
```
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.
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.

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

This command was first available in ExtremeXOS 15.3.

This command is available on all Summit family switches, BlackDiamond X8 series switches and BlackDiamond 8000 series modules.

Published August 2016prev | next