We have 2 5700 FF switches that currently have a port link-aggregation setup across 4 of the 10G ports and is working fine as a 40G channel. We recently purchased 40G SFP+ modules that I would like to now use to replace that communication channel.
Initially, my thought is to add the 40G ports into the LAGG group with the 10G modules and then once everything is working, remove the 10G as needed. However, when I add my first 40G port in, I see no change and when I inspect the port, I see that it shows the following status:
Current state: UP
Line protocol state: DOWN(LAGG)
I can see that the port is up, but for some reason the line protocol doesn't come up. Is it possible that you are not able to do LAGG across the SFP+ and the QSFP+ ports?
If so, is there a way to bring up a separate LAGG group for just the QSFP+ ports without causing a network disruption? I started that route yesterday but quickly shut it down when I started noticing some indicators that made me think there may have been a routing issue starting.
Configurations:
interface Bridge-Aggregation40
description 5700Cross
port link-type trunk
port trunk permit vlan all
link-aggregation mode dynamic
interface Ten-GigabitEthernet1/0/40
port link-type trunk
port trunk permit vlan all
port link-aggregation group 40
interface FortyGigE1/0/41
port link-type trunk
port trunk permit vlan all
port link-aggregation group 40
#FlexFabric#Bridge-Aggregation#LAGG#5700#Link-Aggregation