VMAN Example, BlackDiamond 8810

The following example shows the steps to configure a VMAN (PBN) on the BlackDiamond 8810 switch shown in the following figure.

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Sample VMAN Configuration on BlackDiamond 8810 Switch

The VMAN is configured from the building to port 1, slot 3 on the BlackDiamond 8810 switch and from port 2, slot 3 on the BlackDiamond 8810 switch to the BlackDiamond® 6808 switch:

enable jumbo frames
create vman vman_tunnel_1
configure vman vman_tunnel_1 tag 100
configure vman vman_tunnel_1 add port 3:1 untagged
configure vman vman_tunnel_1 add port 3:2 tagged
disable dot1p examination port 3:2
enable dot1p examination inner-tag port 3:2

The following example configuration demonstrates configuring IP multicast routing between VMANs and VLANs (when VMAN traffic is not double-tagged) on the BlackDiamond 8800 series switch and the Summit family of switches.

Using this configuration you can use a common uplink to carry both VLAN and VMAN traffic and to provide multicast services from a VMAN through a separate VLAN (notice that port 1:1 is in both a VLAN and a VMAN):

enable jumbo-frame ports all
configure vman ethertype 0x8100
create vlan mc_vlan
configure vlan mc_vlan tag 77
create vman vman1
configure vman vman1 tag 88
configure vlan vman1 ipaddress
configure vlan mc_vlan ipaddress
enable ipforwarding vman1
enable ipforwarding mc_vlan
enable ipmcforwarding vman1
enable ipmcforwarding mc_vlan
configure vlan mc_vlan add port 1:1 tag
configure vman vman1 add port 1:1 tag
configure vman vman1 add port 2:1, 2:2, 2:3


IGMP reports can be received untagged on ports 2:1, 2:2, and 2:3. Tagged IP multicast data is received on mc_vlan port 1:1 and is routed using IP multicasting to vman1 ports that subscribe to the IGMP group.

IGMP snooping (Layer 2 IP multicasting forwarding) does not work on the VMAN ports because there is no double-tagged IP multicast cache lookup capability from port 1:1.