We have 2 3270 filers, each using a LACP portchannel over 2 1G interfaces to a CISCO 6500.

When we enable LACP debugging, we get this.

Apr 1 14:08:04 kudan.its.uow.edu.au netapp: [ID 702911 daemon.info] (e4b) Mux state change: (MUX_COLLECT_DISTRIBUTE) to (MUX_COLLECTING) Apr 1 14:08:04 kudan.its.uow.edu.au netapp: [ID 702911 daemon.info] (e4b) Mux state change: (MUX_COLLECTING) to (MUX_ATTACHED) Apr 1 14:08:04 kudan.its.uow.edu.au netapp: [ID 702911 daemon.info] (e4b) Mux state change: (MUX_ATTACHED) to (MUX_DETACHED) Apr 1 14:08:04 kudan.its.uow.edu.au netapp: [ID 702911 daemon.info] (e4b) Mux state change: (MUX_DETACHED) to (MUX_WAITING) Apr 1 14:09:04 kudan.its.uow.edu.au netapp: [ID 702911 daemon.info] (e4b) Mux state change: (MUX_WAITING) to (MUX_ATTACHED) Apr 1 14:09:04 kudan.its.uow.edu.au netapp: [ID 702911 daemon.info] (e4b) Mux state change: (MUX_ATTACHED) to (MUX_COLLECTING) Apr 1 14:09:04 kudan.its.uow.edu.au netapp: [ID 702911 daemon.info] (e4b) Mux state change: (MUX_COLLECTING) to (MUX_COLLECT_DISTRIBUTE) Apr 1 14:16:25 kudan.its.uow.edu.au netapp: [ID 702911 daemon.info] (e4a) Mux state change: (MUX_COLLECT_DISTRIBUTE) to (MUX_COLLECTING) Apr 1 14:16:25 kudan.its.uow.edu.au netapp: [ID 702911 daemon.info] (e4a) Mux state change: (MUX_COLLECTING) to (MUX_ATTACHED) Apr 1 14:16:25 kudan.its.uow.edu.au netapp: [ID 702911 daemon.info] (e4a) Mux state change: (MUX_ATTACHED) to (MUX_DETACHED) Apr 1 14:16:25 kudan.its.uow.edu.au netapp: [ID 702911 daemon.info] (e4a) Mux state change: (MUX_DETACHED) to (MUX_WAITING) Apr 1 14:16:25 kudan.its.uow.edu.au netapp: [ID 702911 daemon.info] (e4a) Mux state change: (MUX_WAITING) to (MUX_ATTACHED) Apr 1 14:16:25 kudan.its.uow.edu.au netapp: [ID 702911 daemon.info] (e4a) Mux state change: (MUX_ATTACHED) to (MUX_COLLECTING) Apr 1 14:16:25 kudan.its.uow.edu.au netapp: [ID 702911 daemon.info] (e4a) Mux state change: (MUX_COLLECTING) to (MUX_COLLECT_DISTRIBUTE) Apr 1 14:18:26 kudan.its.uow.edu.au netapp: [ID 702911 daemon.info] (e4a) Mux state change: (MUX_COLLECT_DISTRIBUTE) to (MUX_COLLECTING) Apr 1 14:18:26 kudan.its.uow.edu.au netapp: [ID 702911 daemon.info] (e4a) Mux state change: (MUX_COLLECTING) to (MUX_ATTACHED) Apr 1 14:18:26 kudan.its.uow.edu.au netapp: [ID 702911 daemon.info] (e4a) Mux state change: (MUX_ATTACHED) to (MUX_DETACHED) Apr 1 14:18:26 kudan.its.uow.edu.au netapp: [ID 702911 daemon.info] (e4a) Mux state change: (MUX_DETACHED) to (MUX_WAITING) Apr 1 14:18:26 kudan.its.uow.edu.au netapp: [ID 702911 daemon.info] (e4a) Mux state change: (MUX_WAITING) to (MUX_ATTACHED) Apr 1 14:18:26 kudan.its.uow.edu.au netapp: [ID 702911 daemon.info] (e4a) Mux state change: (MUX_ATTACHED) to (MUX_COLLECTING) Apr 1 14:18:26 kudan.its.uow.edu.au netapp: [ID 702911 daemon.info] (e4a) Mux state change: (MUX_COLLECTING) to (MUX_COLLECT_DISTRIBUTE) Apr 1 14:08:04 kudan.its.uow.edu.au netapp: [ID 702911 daemon.info] (e4b) Mux state change: (MUX_COLLECT_DISTRIBUTE) to (MUX_COLLECTING) Apr 1 14:08:04 kudan.its.uow.edu.au netapp: [ID 702911 daemon.info] (e4b) Mux state change: (MUX_COLLECTING) to (MUX_ATTACHED) Apr 1 14:08:04 kudan.its.uow.edu.au netapp: [ID 702911 daemon.info] (e4b) Mux state change: (MUX_ATTACHED) to (MUX_DETACHED)

The settings on the switch and the netapp seem to agree. If our understanding of this is correct, there is a LACP packet every 30 seconds (active setting). If 3 are missed in a row, the netapp downs that leg of the portchannel. Later, a packet arrives and the netapp ups the leg of the portchannel.

Does anybody with a deep understanding of this know why we get these messages and why it appears the netapp is uping and downing the interface and if this is serious.

Any help appreciated.

Regards, pdg

Peter Gray Ph (direct): +61 2 4221 3770 Information Technology Services Ph (switch): +61 2 4221 3555 University of Wollongong Fax: +61 2 4229 1958 Wollongong NSW 2522 Email: pdg@uow.edu.au Australia URL: http://pdg.uow.edu.au