[c-nsp] ISR detects interface status with delay

Martin T m4rtntns at gmail.com
Thu Feb 5 10:44:59 EST 2015


Hi,

I have a Cisco WS-C2960G-24TC-L switch(IOS
c2960-lanbasek9-mz.150-2.SE7.bin) and Cisco 1841 router(IOS
c1841-advipservicesk9-mz.151-4.M1.bin) connected like this:

sw1[Gi0/3] <-> [Fa0/0]r3

If I pull out the cable from "sw1" port Gi0/3, then "r3" detects this
with 5 - 7 second delay. I configured "carrier-delay msec 0" under
"r3" interface Fa0/0, but this did not help. For example here:
http://s1.postimg.org/9zf76q0el/cable_removed_from_sw1_Gi0_3.png "sw1"
detects that the port Gi0/3 went down at 15:10:57 - 15:10:58, but "r3"
detected this 15:11:04 - 15:11:05. Clock in all the devices is exactly
the same. What might cause such behavior?


thanks,
Martin


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