Multicast-Bvlan Enable - HP FlexFabric 5930 Series Command Reference Manual

Tandem replication—Replicates frames only at the node where the shortest path tree forks. This
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method is suitable for SPBM VSIs that have dense multicast traffic. It requires BCBs to maintain
multicast FDB entries.
Head-end replication is suitable for service instances that have sparse multicast traffic. Tandem
replication is suitable for service instances that have dense multicast traffic.
Examples
# Enables tandem replication.
<Sysname> system-view
[Sysname] vsi vpn1
[Sysname-vsi-vpn1] spb i-sid 256
[Sysname-vsi-vpn1-256] multicast replicate-mode tandem

multicast-bvlan enable

Use multicast-bvlan enable to enable the multicast B-VLAN feature.
Use undo multicast-bvlan enable to restore the default.
Syntax
multicast-bvlan enable
undo multicast-bvlan enable
Default
The multicast B-VLAN feature is disabled.
Views
SPBM view
Predefined user roles
network-admin
Usage guidelines
By default, the device uses one B-VLAN to transmit both unicast and multicast traffic. If tandem
replication is used, you must enable the multicast VLAN feature for the device to use separate VLANs for
unicast and multicast traffic.
If the multicast B-VLAN feature is enabled, you must assign an odd B-VLAN ID to an I-SID for SPBM to
transmit unicast traffic. SPBM automatically chooses the next higher even B-VLAN ID (odd B-VLAN ID
plus 1) for multicast traffic.
ISIS-SPB only advertises the odd B-VLAN IDs. It uses the odd B-VLAN IDs when populating the unicast
FDB table with routes. When populating the multicast FDB table with routes, it uses the even B-VLAN IDs.
When you use the multicast B-VLAN feature, follow these restrictions and guidelines:
• You must enable or disable the multicast B-VLAN feature on all nodes in the SPBM network.
You must map both odd B-VLAN ID and even B-VLAN ID to MSTI 4092, and assign all ports on the
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path of the two VLANs to the VLANs.
• Assign the odd B-VLAN ID for unicast traffic to the I-SID when you use the b-vlan command. The
device will automatically assign the even B-VLAN ID to the I-SID for multicast traffic.
Examples
# Enable the multicast B-VLAN feature.
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