06-15-2012 11:18 AM - edited 03-07-2019 07:16 AM
I currently have an etherchannel configured between my Nexus and a NetApp device. I have two 4-port etherchannels that are set for LACP (mode active) that are working and 1 2-port configured exactly the same that won't work.
12 Po12(SU) Eth LACP Eth1/17(s) Eth1/18(P)
I turned on LACP error debugging and the error I get when I shut the Eth 1/17 interface and bring it back up is:
2012 Jun 15 14:09:46.731141 lacp: lacp_proto_suspend_secondary_ports(2049): Ethernet1/20(0x1a013000): Got port with non matching lag selection
2012 Jun 15 14:09:46.731177 lacp: lacp_proto_suspend_secondary_ports(2050): Port LAG=[(1, 2-a0-98-1c-a7-3e, 1, 0, 4), (8000, 40-55-39-25-75-41, c, 8000, 114)]
2012 Jun 15 14:09:46.731200 lacp: lacp_proto_suspend_secondary_ports(2052): Port channel LAG=[(1, 2-a0-98-1c-c7-86, 1, 0, 0), (8000, 40-55-39-25-75-41, c, 0, 0)]
The configuration of the ports:
interface Ethernet1/17
description NetApp NAS
switchport
switchport access vlan 2
storm-control broadcast level 1
storm-control multicast level 1
channel-group 12 mode active
no shutdown
interface port-channel12
description TSG-NAS5 Etherchannel
switchport
switchport access vlan 2
spanning-tree port type edge
storm-control broadcast level 1
storm-control multicast level 1
Any ideas of why lacp is having this issue?
Keith
06-15-2012 11:39 AM
Missing spanning tree port type edge on the port itself.
06-16-2012 04:50 AM
Looks like that got rid of the lacp error messages. I turned on etherchannel debugging and now I get this when shut/no shut on the port.
7010(config-if)# show port-2012 Jun 16 07:49:30.425278 eth_port_channel: pcm_eth_port_ac_drop_all_txns(897): Interface Ethernet1/17 suspended by protocol
2012 Jun 16 07:49:30.425317 eth_port_channel: pcm_proc_response(403): Ethernet1/17 (0x1a010000): Setting response status to 0x402b000c (port not compatible) for MTS_OPC_ETHPM_PORT_BRINGUP (61442) response
2012 Jun 16 07:49:30.425457 eth_port_channel: pss_create_mbr_tlv(330): Not writing type 3 to mbr pss
11-15-2016 11:25 AM
Same problem with same errors but I just fixed it. I had 2 Po's with 2 int's each.
Po55 Po56
e1/17 e1/19
e1/18 e1/20
One int in each Po was in suspnd. I deleted Po56, defaulted both int's (19 & 20), added ints 19 & 20 to channel-group 55. This time when doing a "sho port-c sum" Po55 showed int's 17 and 19 up and working. Int's 18 and 20 were in suspnd. I configured Po56 with int's 18 and 20 and it came up.
Basically, it looks like the cables may have been mixed up.
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