Users Guide

Layer 2 Switching Commands 653
User Guidelines
The system priority must be configured identically on all VPC peers. If the
configured VPC system priority is different on any VPC peer, the VPC will
not come up.
The system-priority is present in the LACP PDUs that are sent out on VPC
member ports. When the VPC system priority is configured after a VPC
primary device is elected, the already agreed operational VPC system priority
is used in the LACP PDUs instead of the newly configured VPC system
priority.
Command History
Introduced in version 6.2.0.1 firmware.
Example
console(config-vpc 1) system-priority 2774
vpc
Use the vpc command to configure a port-channel (LAG) as part of an
MLAG instance. Upon issuing this command, the port-channel is down until
the port-channel member information is exchanged and agreed between the
MLAG peer switches.
Use the no form of the command to remove the LAG from the MLAG
domain.
Syntax
vpc vpc-id
no vpc vpc-id
• vpc-id—The MLAG identifier.
Default Configuration
LAGs are not members of an MLAG domain by default. It is expected that all
links belonging to an MLAG instance are connected to switch (or switches)
which consider the links to be members of a single LAG.