Servers using ‘teamed’ nics, (LACP) can fail if the switch is rebooted because the server fails to respond to LACP BPDUs. This will result in a loss of connection to the server.
Solution 1:
LACP sets a port to the suspended state if it does not receive an LACP bridge protocol data unit (BPDU) from the peer ports in a port channel. This can cause some servers to fail to boot up as they require LACP to logically bring up the port.
This command does not require a license.
Examples
This example shows how to enable LACP port suspension on a port channel:
This example shows how to disable LACP port suspension on a port channel:
show lacp [port channel number] neigh
(check the interfaces which are expected to join this port channel we will change the config of those interfaces)
Conf t
interface [the first interface which is configured for the port channel being checked]
no channel-group [the port channel number] mode active
!
interface [the second interface which is configured for the port channel being checked]
no channel-group [the port channel number] mode active
channel-group [the port channel number] mode desirable
!
interface [the first interface which is configured for the port channel being checked]
channel-group [the port channel number] mode desirable
!
When it is done, to check the interfaces are now up/up and the service given by the servers connected to them have been restored.
Repeat this process for each impacted port channel.
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