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Webcast-Catalyst9k
New Member

Line protocol on serial interface goes down after a mintue

Serial line protocol goes down after 1minute if the other end which is

connected to Nortel Passport is locked.This results a delay in redundant link

coming up..

Channelised E1 connectivity between Nortel passport at one location to the cisco 7206 router.

sample config

interface Serial2/0

bandwidth 1500

no ip address

ip verify unicast reverse-path

no ip redirects

no ip unreachables

no ip proxy-arp

encapsulation ppp

no ip route-cache cef

no ip mroute-cache

load-interval 30

no fair-queue

timeslot 1-31

crc4

serial restart-delay 0

no cdp enable

ppp multilink

multilink-group 1

Is there any command that i could in serial interface or on the passport to have my line protocol going down immed.

2 REPLIES
Hall of Fame Super Gold

Re: Line protocol on serial interface goes down after a mintue

Detecting that there is a failure on the link is usually dependent on keepalive messages failing. The default is to send keepalives every 10 seconds - which usually means that it takes 30 seconds to detect the failure. I do not think that we can make it quite immediate, but if you use the interface command keepalive to set a shorter keepalive time you should be able to detect the failure much more quickly.

HTH

Rick

New Member

Re: Line protocol on serial interface goes down after a mintue

Thanks Rick,

I had tried keeping Keepalive 5 , but still it was not working out.If the physical port is lokced on passport then line protocol goes down immed, but if logical port is locked this delay happens.

on the viceversa if i shut the serial interface the passport detects immediately.i'm jus thinking if any config needs to be done at Nortel passport.

Thanks for your time Rick

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