Validation!
On the Juniper EX9208 switches, the command “show interfaces mc-ae” will display
the status of configured MC-LAGs. For example, here is the output of that command on
EX9208A:
root@EX9200A# run show interfaces mc-ae
Member Link : ae1
Current State Machine's State: mcae active state
Local Status : active
Local State : up
Peer Status : active
Peer State : up
Logical Interface : ae1.0
Topology Type : bridge
Local State : up
Peer State : up
Peer Ip/MCP/State : 192.18.39.2 xe-0/0/0.0 up
Member Link : ae2
Current State Machine's State: mcae active state
Local Status : active
Local State : up
Peer Status : active
Peer State : up
Logical Interface : ae2.0
Topology Type : bridge
Local State : up
Peer State : up
Peer Ip/MCP/State : 192.18.39.2 xe-0/0/0.0 up
Similarly, the command “show iccp” will display the status of the inter-switch link:
root@EX9200A# run show iccp
Redundancy Group Information for peer 192.18.39.2
TCP Connection : Established
Liveliness Detection : Up
Backup liveness peer status: Up
Redundancy Group ID Status
1 Up
Client Application: l2ald_iccpd_client
Redundancy Group IDs Joined: 1
Client Application: lacpd
Redundancy Group IDs Joined: 1
Also, as with regular link aggregation, the command “show interfaces <aeX>
detail” will display information on the status of LAG X, where X is the LAG ID.
In the event of a link failure between Juniper and Cisco switches, these same commands
will also indicate a change in LAG status.
On Cisco Catalyst 3850 switches , the command “show etherchannel summary”
will display the status of LAG members. On Cisco Nexus 7010 switches, the equivalent
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