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atm interface on c3725 link flapping

icmqdmakskdw23s
Level 1
Level 1
Hello, I am a beginner network engineer. I'm currently facing a problem and would like some advice.

The router currently in use is C3725, which uses an ATM interface called 1A-OC3SMI.

The config settings for both routers are as follows.

interface ATM2/0
 no ip address
 no atm ilmi-keepalive
!
interface ATM2/0.50 point-to-point
 ip address x.x.x.x x.x.x.x
 no ip redirects
 no ip unreachable
 no ip proxy-arp
 pvc 0/50
 !

Currently, the C3725 router is using version 12.3(9), and when I connect the optical cable to both routers, the link keeps repeating up/down.

I would like to receive advice on whether there is a problem with the config or whether I need to check something else.


thank you
3 Replies 3

marce1000
VIP
VIP

 

        - Check logs on the  C3725 router

 M.



-- Each morning when I wake up and look into the mirror I always say ' Why am I so brilliant ? '
    When the mirror will then always repond to me with ' The only thing that exceeds your brilliance is your beauty! '

balaji.bandi
Hall of Fame
Hall of Fame

been years worked on atm - not sure industry still using (may be some places yes i guess)

not much information here to help you - we need more logs see what is wrong ?

check below troubleshooting guide :

https://www.cisco.com/c/en/us/support/docs/interfaces-modules/interface-cards/71820-routermodules.html

BB

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Joseph W. Doherty
Hall of Fame
Hall of Fame

Is this a "real" ATM provider link, or a lab back-to-back setup?  If provider ATM, this a first time setup?

What's the IOS feature set?

"Both routers", other router same hardware and IOS?