FR ckts. can drop generally either due to provider switch problem or due to
line problem.
If you got a CSU/FRAD, check the line performance parameters. First look for
stats. to see
any errors, specially SES/BES or UAS. Some CSU/DSU provides also status on
the errors like
Yellow/Red alarm etc. Also check Frame relay parameters like Frame
reliability errors and lmi
disconnects to isolate whether this is a frame relay issue. From a practical
point of view, run a continious
ping with 1500 bytes to see whether packets drops but your problem more seem
to be a LEC issue or FR
switch. Once a ckt. drops it takes exactly 1 minute for FR ckt. to come back
up.
Hope this helps.
Habeeb.
> -----Original Message-----
> From: David Welch [SMTP:[EMAIL PROTECTED]]
> Sent: Tuesday, November 07, 2000 5:58 AM
> To: [EMAIL PROTECTED]
> Subject: Frame relay problem
>
> Hi, Could anyone help with the following : Part of our network consists of
>
> Cisco 4500 routers connected via BT frame relay links.
> The problem I am seeing on all 10 routers is links going down then up,
> often
> for exactly one minute : eg
>
> .Oct 24 16:25:32 UTC: %FR-5-DLCICHANGE: Interface Serial2/0 - DLCI 592
> state
> cha
> nged to INACTIVE
> .Oct 24 16:25:32 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface
> Serial2/0.
> 4, changed state to down
> .Oct 24 16:26:32 UTC: %FR-5-DLCICHANGE: Interface Serial2/0 - DLCI 592
> state
> cha
> nged to ACTIVE
> .Oct 24 16:26:32 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface
> Serial2/0.
> 4, changed state to up
>
> The PTT have tested all lines and insist they are clean
> This is happening about 5 - 10 times a day. The IOS was upgraded not too
> long ago I think. It is now 12.0(4)
> This doesn't seem to have much impact but my customer just wants to know
> why!
> Any ideas/suggestions very welcome
>
> TIA
>
> Dave Welch
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