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Configuring MCLAG Configuring Multi-chassis Link Aggregation
page 10-30 OmniSwitch AOS Release 7 Network Configuration Guide June 2013
Configuring the Chassis ID
To configure MCLAG, a unique chassis identifier must first be assigned to each of the switches that will
form the multi-chassis domain. Assigning the chassis ID also enables multi-chassis functionality for the
switch, thus allowing configuration of additional MCLAG parameters for the switch.
The multi-chassis chassis-id command is used to configure a unique chassis ID for a peer switch within
the domain. For example:
-> multi-chassis chassis-id 1
By default, the chassis ID is set to “0”. This indicates the switch is running in standalone mode, which
means that no multi-chassis functionality is available.
Configuring the Group ID
Configuring a group identifier for each of the peer switches that are members of the same multi-chassis
group (pair of peer switches) is recommended. Each peer switch within the same group must use the same
group ID, which identifies the switch as belonging to that group. Each group must use a group ID that is
different from those assigned to other groups.
The multi-chassis chassis-group command is used to configure the same group ID number for each peer
switch within a group. For example:
-> multi-chassis chassis-group 1
By default, the chassis group ID is set to “0”. In a network environment where more than one pair of
MCLAG peer switches may exist, such as in a back-to-back MCLAG setup, configure each domain with
its own unique group ID. Duplicate group IDs are not detected by MCLAG.
See the “Example 2: MCLAG Group ID Configuration” on page 10-37 to see how the group ID is used to
uniquely identify two separate groups of multi-chassis peer switches to avoid duplicate MAC addresses in
an MCLAG network environment.
Creating the Virtual Fabric Link (VFL)
The VFL is an aggregate of high-speed ports used for inter-chassis traffic and control data through the
IPC-VLAN. For MCLAG to become operational, a VFL must be configured and brought to an opera-
tional state.
To configure a VFL and its member ports, use the multi-chassis vf-link create command. For example:
-> multi-chassis vf-link create
-> multi-chassis vf-link member-port 2/1
-> multi-chassis vf-link member-port 2/2
Configuring the VFL Default VLAN
Traffic belonging to the VFL default VLAN will be sent across the VFL untagged. In addition, the VFL
automatically becomes a member of any additional VLANs configured on the multi-chassis peers as
tagged VLANs.
To configure the VFL default VLAN, use the multi-chassis vf-link default-vlan command. For example:
-> multi-chassis vf-link default-vlan 2