>Date: Mon, 22 Nov 1999 11:19:12 -0500
>From: "Fabien Berger" <berger@ip-plus.net>
>
>2 routers are connected via a serial v.35 (HDLC encapsulation, keepalives are
>set to 10s). on one end of the line the line protocol is down and on the other
>the line protocol stays up (link is up in both ends). a sh/no sh does not help.
Looks like keepalives are sent and/or received just in one direction.
Have a look at you interfaces "last input/last output" timestamps (show
int).
>the problem is that the static routes pointing towards that interface (with
>line protocol up) are not removed. traffic is lost! does this mean that we
>should never trust the keepalives? should we always let a routing protocol
>discover link failures?
Even _with_ routing protocols you can have problems in such a situation
(updates/keepalives getting through just in one direction).
Probably PPP is smarter in detecting a semi-permeable link and turning
it to down on both ends.
Wkr
CP
This archive was generated by hypermail 2b29 : Sun Aug 04 2002 - 04:12:07 EDT