Imran,
 
I am no expert but would to put in my 0.02. 
Do you have logging setup on the HO router?  Had the serial interface went down and came back up.  Is the branch connect to any other subnet? If not, maybe you could use a static route and see what happens.  But first check the log of both routers and see what had happened.
 
Hope its helps.
Albert
 
-----Original Message-----
From: msasif [mailto:[EMAIL PROTECTED]]
Sent: Monday, August 07, 2000 8:15 AM
To: [EMAIL PROTECTED]
Subject: SERIAL is UP, but no routes to destn

HI,
I have strange problem with one of my customer router. The users in the branch will not be able to connect to the HO for sometimes and when I checked the serial it shows (serial is up and line protocol is up) but when I gave(show ip route) I could not see the branch n/w subnet route, I could not be able to ping the ethernet ip address of the branch from HO. When I gave shutdown and no shutdown at the HO serial, I can see the branch subnet and the users can access the server. Iam using RIP. I tried changing the keepalive to 5sec but no use.
 
Is it h/w problem, but Iam getting this very rarely(twice, sometime in a week).
 
thanks
 
imran   

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