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New Member

Configuring ATM\IMA back to back

This is purely for lab experimentation. I'm trying to configure atm\ima in a back to back configuration. The int are up\up but cannot pass traffic.

UNGROUPED CONFIGURATION:

Router A

interface atm 1/0

no ip addr

no atm ilmi-keepalive

!

interface atm 1/0.1 point-to-point

ip address 192.168.1.10 255.255.255.0

no atm ilmi-keepalive

atm clock internal

pvc 1/35

!

protocol ip 192.168.1.20 broadcast

!

Router B

interface atm 1/2

no ip addr

no atm ilmi-keepalive

!

interface atm 1/2.1 point-to-point

ip address 192.168.1.20 255.255.255.0

no atm ilmi-keepalive

atm clock internal

pvc 1/35

!

protocol ip 192.168.1.10 broadcast

******************

GROUPED IMA CONFIGURATION

R1

interface ATM1/0

clock source internal

no ip address

scrambling-payload

ima-group 1

no atm ilmi-keepalive

!

interface ATM1/1

clock source internal

no ip address

scrambling-payload

ima-group 1

no atm ilmi-keepalive

!

interface ATM1/IMA1

no ip address

no atm ilmi-keepalive

!

interface ATM1/IMA1.1 point-to-point

ip address 12.12.12.1 255.255.255.0

no atm ilmi-keepalive

pvc 1/100

protocol ip 12.12.12.2 broadcast

!

-----------------

R2

interface ATM1/2

clock source line

no ip address

scrambling-payload

ima-group 1

no atm ilmi-keepalive

!

interface ATM1/3

clock source line

no ip address

scrambling-payload

ima-group 1

no atm ilmi-keepalive

!

interface ATM1/IMA1.1 point-to-point

ip address 12.12.12.2 255.255.255.0

no atm ilmi-keepalive

pvc 1/100

protocol ip 12.12.12.1 broadcast

What am I missing in the config???

Thanks Much

5 REPLIES
Hall of Fame Super Gold

Re: Configuring ATM\IMA back to back

Should work, you can take "show ima interface atm 1/ima1 detail" to see what's going on.

Note you don't need "protocol ip x.x.x.x" with p2p subinterfaces.

New Member

Re: Configuring ATM\IMA back to back

Something is definately missing from the config, because even with static routing - nothing is getting over the atm connections.

Hall of Fame Super Gold

Re: Configuring ATM\IMA back to back

Check and post output of above command first.

New Member

Re: Configuring ATM\IMA back to back

p.bevilacqua, thank you for taking the time to help me out on this issue.

I decided to break the config. down to the most basic elements and go from there ..... and bam!!! lol! Got it working.

I also discovered, that for some unknown reason, if the module has atm links in waiting {No config. but up\up} .. it won't let configured int. come up. So I had to shut down all int. that didn't have a config. VERY STRANGE!

I'm using NM-4T1-IMA & NM-8T1-IMA modules in 2651xm routers.

*********

Non-IMA Configuration WORKING!

R1

!

interface ATM1/0

no ip address

!

interface ATM1/0.1 point-to-point

ip address 10.10.10.1 255.255.255.0

pvc 1/40

encapsulation aal5snap

protocol ip 10.10.10.2 b

!

R2

!

interface ATM1/2

no ip address

!

interface ATM1/2.1 point-to-point

ip address 10.10.10.2 255.255.255.0

pvc 1/40

encapsulation aal5snap

protocol ip 10.10.10.1 b

!

*******************************

IMA Configuration WORKING!

R1

!

interface ATM1/0

no ip address

ima-group 0

!

interface ATM1/1

no ip address

ima-group 0

!

interface ATM1/ima0

no atm ilmi-keepalive

no ip address

!

interface ATM1/ima0.1 point-to-point

ip address 10.10.10.1 255.255.255.0

pvc 10/100

encapsulation aal5snap

protocol ip 10.10.10.2 b

!

#########################

R2

!

interface ATM1/2

no ip address

ima-group 1

!

interface ATM1/3

no ip address

ima-group 1

!

interface ATM1/ima1

no atm ilmi-keepalive

no ip address

!

interface ATM1/ima1.1 point-to-point

ip address 10.10.10.2 255.255.255.0

pvc 10/100

encapsulation aal5snap

protocol ip 10.10.10.1 b

!

Again thanks much

New Member

Re: Configuring ATM\IMA back to back

Please see the attachment for the full config & verification efforts.

Thanks

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