Packet drops observed when portchannel is made with Avaya switches

[shivang.badola92111]

Hi All,

I have created a stackwise virtual with two cisco Catalyst 9047(Core switch is the scenario) which is working completely fine and tested.

For example:-

I have an Avaya Switch 4500 series at access layer and I have connected 1 port each on both the Catalyst 9407 for portchannel 

port 1 ( Avaya) -> gigabit1/1/0/1 ( first slot of Switch 1 )

port 2 (Avaya) -> Gigabit 2/1/0/1 ( First slot of Switch 2)

If I disconnect a link from portchannel I see one packet drop in ping and flow is maintained without any issue.

Problem comes when I connect the same link back I observe 4-5 packet drops in ping then traffic gets through the network

Is their anything which can be set on either side to make choose the active link to be active if in case standby link of portchannel goes down and come back online without causing any network disruption.

[Georg Pauwen]

Hello,

on the Cisco side interfaces, set the 'lacp rate' to fast...

https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst9400/software/release/16-9/command_reference/b_169_9400_cr/layer_2_3_commands.html#id_15000