x440-48p-10G flashing ports

[dj_mcadams]

Have a stack of six x440-48p-10G with one x440-48p-10G trunked off of it. All ports on the stack (except switch 1 and 2) are flashing rapidly as if there is a loop, however I cant see any loops through the log or ELRP and network wise everything is working normally (although slow routing between vlans).

[dj_mcadams]

It looks like stack ports are blocked:

* Slot-1 75-AMORY-STACK.36 # show stacking stack-portsStack Topology is a Ring
Slot Port Select Node MAC Address Port State Flags Speed
---- ---- ------ ----------------- ----------- ----- -----
*1 1 49 00:04:96:99:b7:89 Operational C- 10G
*1 2 50 00:04:96:99:b7:89 Operational C- 10G
2 1 49 00:04:96:99:b7:8f Operational C- 10G
2 2 50 00:04:96:99:b7:8f Operational C- 10G
3 1 49 00:04:96:99:97:dc Operational C- 10G
3 2 50 00:04:96:99:97:dc Operational C- 10G
4 1 49 00:04:96:99:97:d5 Operational C- 10G
4 2 50 00:04:96:99:97:d5 Operational CB 10G
5 1 49 00:04:96:99:8a:fa Operational CB 10G
5 2 50 00:04:96:99:8a:fa Operational C- 10G
6 1 49 00:04:96:99:97:d7 Operational C- 10G
6 2 50 00:04:96:99:97:d7 Operational C- 10G

* Slot-1 75-AMORY-STACK.34 # show stackingStack Topology is a Ring
Active Topology is a Ring
Node MAC Address Slot Stack State Role Flags
------------------ ---- ----------- ------- ---
*00:04:96:99:b7:89 1 Active Master CA-
00:04:96:99:b7:8f 2 Active Standby CA-
00:04:96:99:97:dc 3 Active Standby CA-
00:04:96:99:97:d5 4 Active Standby CA-
00:04:96:99:8a:fa 5 Active Standby CA-
00:04:96:99:97:d7 6 Active Backup CA-

[Paul_Russo]

can you post the command show stacking and show stacking ports?

Thanks
P

[dj_mcadams]

Yes, one link between switches with tagged vlans, no lags are configured. ELRP is not turn on the port going to the stand alone switch

[Stephane_Grosj1]

Slow routing is not normal. Do you have slowpath forwarding happening?

[Paul_Russo]

Hey Dj

ok so when you say it is trunked do you mean that the other switch has one link with VLANs tagged to the stack or do you mean that you have two ports LAGed together between the switch and the stack?

is ELRP turned on the port going to the stand alone switch?

P