Kevin Hardie wrote:
>
>
> ATM cell locks seem fairly common looking at the M10 log, but
> sometimes they
> seem to turn into more serious crashes:
> snippet from log:
>
> ATM: Cell lock may be lost, re-checking
> ATM: Cell lock has been recovered
> DSLU: dsl_ADIperiodic : Link lost LOF Failure
> ATM: PHY layer has gone down
> IPCP: (vcc1) PPP protocol down
> IP: (vcc2) Physical Link Down
>
> From the reconnection order, it seems PPP first, the DSLU
> then PHY the ATM
> layers need to recover, then the DNS etc and the whole
> process to reconnect
> is more than 30 seconds (then it crashed again 10 seconds later!)
>
> Are these crashes just part of ADSL life and should we accept
> them same as
> is done on windows machines (What, you haven't had to do a restart yet
> today?)
>
Another issue is how long the outages are. TCP is moderately resilient, but
other protocols and many applications are not.

>From the look of your log entries it does suggest that loss of ATM cell lock
will cause a link down event on vcc2, so if you're thinking of collecting
data over time to discuss Service Levels, then snmp is probably the way to
go.

Rob

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Received on Wed Jul 5 11:39:55 2000