Dell N1100-ON, Reference Manual

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Layer 2 Switching Commands
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BPDUs sent out on VPC interfaces. If two VPC domains have the identical
domain-ids, the resulting actor IDs may lead to LACP or STP convergence
issues.
Example
console(config)#vpc domain 1
console(config-vpc 1)#peer-keepalive enable
console(config-vpc 1)#peer-keepalive destination 192.168.0.2 source
192.168.0.1
console(config-vpc 1)#peer detection enable
console(config-vpc 1)#exit
vpc peer-link
Use the vpc peer-link command to configure a port channel as the MLAG
peer link for a domain and enables the peer link protocol.
Use the
no form of the command to remove the peer link configuration from
an MLAG domain and disable the peer link protocol.
Syntax
vpc peer-link
no vpc peer-link
Default Configuration
There are no peer links configured by default.
Command Modes
Port-channel configuration mode
User Guidelines
This configuration must the present on both the primary and secondary
switches. The peer keepalive protocol is required for MLAG operation.
Configure and enable a LAG between the two MLAG peers as an MLAG peer
link before executing this command.
Example
console(config)#interface port-channel 1
console(config-if-Po1)#description "MLAG-Peer-Link"