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Problem with ATM/IMA

Hi, I have a 3745 with IOS v.12.3(9) and AIM-ATM module with 4 interfaces. I know that lines are OK because I tried with another router (a 3600, with older modules). Single ATM intergfaces are 'up' but I'm unable to get up IMA interface, as you can see here:

# sh ima int Interface ATM0/IMA1 is down Group index is 17 Ne state is insufficientLinks, failure status is insufficientLinksNe IMA Group Current Configuration: Tx/Rx minimum required links 1/1 Maximum allowed diff delay is 50ms, Tx frame length 128 Ne Tx clock mode CTC, configured timing reference link ATM0/0 Test pattern procedure is disabled IMA Group Total Counters (time elapsed 0 seconds): 0 Tx cells, 0 Rx cells 5 Ne Failures, 2 Fe Failures, 1618 Unavail Secs IMA link Information: Link Physical Status NearEnd Rx Status Test Status ---- --------------- ----------------- ----------- ATM0/0 up active disabled ATM0/1 up active disabled ATM0/2 up active disabled ATM0/3 up active disabled

Any help? This is my conf (only ATM part):

no network-clock-participate slot 1 network-clock-participate wic 0 network-clock-participate wic 1 network-clock-participate aim 1 network-clock-select 1 E1 0/0 ... controller E1 0/0 mode atm aim 1 ! controller E1 0/1 mode atm aim 1 ! controller E1 0/2 mode atm aim 1 ! controller E1 0/3 mode atm aim 1 ... interface ATM0/0 no ip address scrambling-payload ima-group 1 no atm oversubscribe no atm auto-configuration no atm ilmi-keepalive no atm address-registration no atm ilmi-enable ! interface ATM0/1 no ip address scrambling-payload ima-group 1 no atm oversubscribe no atm auto-configuration no atm ilmi-keepalive no atm address-registration no atm ilmi-enable ! interface ATM0/2 no ip address scrambling-payload ima-group 1 no atm oversubscribe no atm auto-configuration no atm ilmi-keepalive no atm address-registration no atm ilmi-enable ! interface ATM0/3 no ip address scrambling-payload ima-group 1 no atm oversubscribe no atm auto-configuration no atm ilmi-keepalive no atm address-registration no atm ilmi-enable ! interface ATM0/IMA1 no ip address ima differential-delay-maximum 50 no atm oversubscribe no atm auto-configuration no atm ilmi-keepalive no atm address-registration no atm ilmi-enable ! interface ATM0/IMA1.1 point-to-point bandwidth 8192 ip address 192.168.110.9 255.255.255.252 ip ospf cost 1000 pvc 10/100 protocol ip 192.168.110.10 broadcast ubr 7680 !

Thanks in advance Mimmus

Reply to
Mimmus
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Here is a config that I have working using IMA T1 cards between a 7206 and a

3640...

no interface atm0/ima1.1

interface atm0/ima1 atm auto-configuration no atm ilmi-keepalive atm address-registration atm ilmi-enable atm uni-version 4.0 ip split-horizon ip address 192.168.110.9 255.255.255.252 ip ospf cost 1000

pvc 0/5 qsaal pvc 0/16 ilmi

pvc 10/100 protocol ip inarp broadcast vbr-nrt 8000 8000 1

The problem is that you need to define a pvc for qsaal (ATM Adaption Layer) and ILMI. I think you need to use these specific pvcs for those services. Without aal and ILMI, the ATM layer never comes up and this is why you get the error "insufficient links"; the links are up, but the ATM layer is not. I think you need to turn on

atm auto-configuration atm ilmi-keepalive atm address-registration atm ilmi-enable

on each of your E1's as well. Only put a bandwidth statement under the IMA interface if you don't want this value to be dynamically calculated. As E1 go up and down, the bandwidth value will change.

That should do the trick...

Scott

Reply to
thrill5

I will try. Thank you. But with older module NM-4T1-IMA all this was un-needed.

Mimmus

Reply to
Mimmus

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