Switching Commands
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ProSAFE M7100 Managed Switches
Multichassis LAG Commands
In a Layer 2 network, a multichassis link aggregation group (MLAG) can provide a better
convergency period and bandwidth than STP. If a port-channel member goes down, the MLAG
provides a quicker convergence period than STP. An MLAG also provides more bandwidth than
STP because all links across multiple devices can be used to handle traffic.
With link aggregation, multiple links between two switches are bundled together in a link
aggregation gr
oup (LAG). The advantages of link aggregation are that all member links are in the
forwarding state, and a link failure does not cause any significant disruption because it takes less
than one second for the LAG to resolve a link failure.
An MLAG extends these advantages across multiple devices. An MLAG allows links that are on
two dif
ferent switches to pair with links on a partner device. The partner device does not detect
that it is pairing with two devices to form a LAG. The advantages of multichassis link aggregation
are that all links can carry data traffic, and a device failure does not cause any significant
disruption because it takes less than one second for an MLAG to resolve the failure and to allow
the traffic in the network to resume.
feature vpc
This command enables the MLAG feature globally. MLAG role election occurs if both the MLAG
feature and the keep-alive state machine are enabled.
no feature vpc
This command disables the MLAG feature globally.
vpc domain
This command lets you enter the MLAG configuration mode.The range of the domain id is 1.
Default Enabled
Format feature vpc
Mode Global Config
Format no feature vpc
Mode Global Config
Format vpc domain <id>
Mode Global Config
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