lan keeps sporatically bouncing up/down

[Norman Dignard]

We have 2 nics in a ia64 hp server rx2620
running HPUX 11.31 with APA configured. Sporactically the lan keeps bouncing up/down for some unknown reason.

This first came to my attendtion from our network guys who mentioned that he's seeing problems on the switch logs. Looking into the hosts syslog I noted the lan problem:

syslog:
ep 12 17:44:16 nesaweb vmunix: APA/LM: LA:lan900 - lan1 is down
Sep 12 17:54:07 nesaweb vmunix: APA/LM: LA:lan900 - lan1 is up

Sep 15 08:42:06 nesaweb xntpd[1653]: synchronized to xxxx, stratum=1
Sep 15 12:56:57 nesaweb vmunix: APA/LM: LA:lan900 - lan1 is down
Sep 15 12:56:57 nesaweb vmunix: APA/LM: LA:lan900 - lan0 is down
Sep 15 12:56:57 nesaweb vmunix: APA/LM: LA:lan900 is down
Sep 15 12:59:10 nesaweb xntpd[1653]: synchronisation lost
Sep 15 13:00:21 nesaweb vmunix: APA/LM: LA:lan900 - lan0 is up
Sep 15 13:00:21 nesaweb vmunix: APA/LM: LA:lan900 is up
Sep 15 13:00:37 nesaweb vmunix: APA/LM: LA:lan900 - lan1 is up
Sep 15 13:01:18 nesaweb xntpd[1653]: synchronized to xxxxx, stratum=1

Can someone shed some light on how to resolve this? lanman doesn't show anything.

lan 0 0/1/2/0 iether CLAIMED INTERFACE HP PCI-X 1000Base-T Dual-port Built-in
lan 1 0/1/2/1 iether CLAIMED INTERFACE HP PCI-X 1000Base-T Dual-port Built-in

hp_apaconf
HP_APA_START_LA_PPA=900
HP_APA_DEFAULT_PORT_MODE=MANUAL *
HP_APA_MAX_LINKAGGS=50
HP_APA_LACP_SYSTEM_ID_MODE=FIRST_APA_PORT
HP_APA_LACP_TIMEOUT=0
HP_APA_USE_SYSLOG=1

HP_APA_INTERFACE_NAME[0]=lan900
HP_APA_LOAD_BALANCE_MODE[0]=LB_MAC
HP_APA_GROUP_CAPABILITY[0]=5
HP_APA_KEY[0]=0
HP_APA_HOT_STANDBY[0]=off
HP_APA_MANUAL_LA[0]=0,1

hp_apaportconf:
HP_APAPORT_INIT_ARGS="HP_APAPORT_GROUP_CAPABILITY HP_PORT_KEY HP_APAPORT_SYSTEM_PRIORITY"

HP_APAPORT_INTERFACE_NAME[0]=lan0
HP_APAPORT_GROUP_CAPABILITY[0]=5
HP_APAPORT_KEY[0]=0
HP_APAPORT_PRIORITY[0]=0
HP_APAPORT_CONFIG_MODE[0]=MANUAL
HP_APAPORT_SYSTEM_PRIORITY[0]=0

HP_APAPORT_INTERFACE_NAME[1]=lan1
HP_APAPORT_GROUP_CAPABILITY[1]=5
HP_APAPORT_KEY[1]=0
HP_APAPORT_PRIORITY[1]=0
HP_APAPORT_CONFIG_MODE[1]=MANUAL
HP_APAPORT_SYSTEM_PRIORITY[1]=0

[Sudeesh]

Are you seeing this errors from the day systems configured or just started recently?

How APA is configured .. Active/Active or Active/Passive?

Do we have required configuration done at switch side to support APA?

[Norman Dignard]

After looking at the nettllog - it was reporting lan cable disconnections. Looks like a bad cable.

[Jim Keeble]

Not likely, because you are seeing the problem on two different lan's, lan0 and lan1, which are aggregated to make lan900.

Look for a problem common to both lan cables on the switch side of the connection.