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Re: troubleshooting Serial interface! posted 12/23/2005
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i think the s 1 not functioning anymore....
here when i swap my connection from S0 to S1...
all link down..
ahhh... i think the serial int fried due to long hour of usage..

----- Original Message ----- From: "Mohamed, Liban [NTK]" <Liban.Mohamed@xxxxxxxxxx>
To: "KSGoh" <kianseng.goh@xxxxxxxxx>; "Cisco certification" <ccielab@xxxxxxxxxxxxxx>
Sent: Saturday, December 24, 2005 7:00 AM
Subject: RE: troubleshooting Serial interface!




This is typically physical layer problem, check the cable. Or maybe it's
just bad interface. Are you taking any other errors on the interface or
the controller?



-----Original Message-----
From: nobody@xxxxxxxxxxxxxx [mailto:nobody@xxxxxxxxxxxxxx] On Behalf Of
KSGoh
Sent: Friday, December 23, 2005 5:51 PM
To: Cisco certification
Subject: troubleshooting Serial interface!

have the following problem on my R1, R2 just show int up/down and
without any
other error message..

00:25:10: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1,
changed
state
to down
00:25:20: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1,
changed
state
to up
00:25:40: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1,
changed
state
to down
00:25:50: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1,
changed
state
to up
00:26:10: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1,
changed
state
to down
00:26:20: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1,
changed
state
to up


my config is very simple... on R1 interface Serial1 ip address 10.100.100.1 255.255.255.0 clockrate 64000 end

on R2
interface Serial1
ip address 10.100.100.2 255.255.255.0
end

any idea how can i troubleshoot this ?
i tried debug int s 1
but nothing comes out..

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