I've got a Cisco 3750e with lag to CRS317. Lag looks ok:
Code: Select all
Switch#show etherchannel 10 sum
Flags: D - down P - bundled in port-channel
I - stand-alone s - suspended
H - Hot-standby (LACP only)
R - Layer3 S - Layer2
U - in use f - failed to allocate aggregator
M - not in use, minimum links not met
u - unsuitable for bundling
w - waiting to be aggregated
d - default port
Number of channel-groups in use: 1
Number of aggregators: 1
Group Port-channel Protocol Ports
------+-------------+-----------+-----------------------------------------------
10 Po10(SU) LACP Te1/0/1(P) Te2/0/1(P)
May 27 2020 16:45:24.647 CDT: %SW_MATM-4-MACFLAP_NOTIF: Host 3a17.e1de.dda4 in vlan 10 is flapping between port Po10 and port Gi2/0/26
Po10 is the lag. Gi2/0/26 is where the device with the mac is actually at.
I think CRS317 is receiving frames with that mac and flooding it along the other link and not treating the Po as a single logical link.
if I shut one link of the PO the issue goes away.
Anyone seen this before?