I've got a 3845 w/ATM AIM module and 4 T1 controller interfaces. The IMA group has 3 T1's in the group. When any one of the three T1's in this group does down, the entire IMA interface goes down. I've checked the min interfaces for the ima group to be up, it's currently at 1. I'm not getting much help from TAC so far. They wanted me to try a different version of IOS since the one we were running on has an advisory. I could not find any bugs related to this issue on this version. I've now running the TAC recommended ver 12.4(10b). That did not help. Still have the issue.
Feels like a config issue, but I've not been able to pin it down. Below are some config snippits and a "show ima interface" output.
Any help would be appreciated.
network-clock-participate wic 0
network-clock-participate wic 1
no network-clock-participate wic 2
network-clock-participate aim 0
network-clock-select 1 T1 0/0/0
network-clock-select 5 T1 0/0/1
network-clock-select 8 T1 0/1/0
controller T1 0/0/0
mode atm aim 0
framing esf
linecode b8zs
description ***** T1 Interface - ATM IMA Bundle
!
controller T1 0/0/1
mode atm aim 0
framing esf
linecode b8zs
description ***** T1 Interface - ATM IMA Bundle
!
controller T1 0/1/0
mode atm aim 0
framing esf
linecode b8zs
description ***** T1 Interface - ATM IMA Bundle
interface ATM0/IMA0
description **** ATM IMA Interface
no ip address
ip route-cache flow
atm bandwidth dynamic
no atm ilmi-keepalive
!
interface ATM0/IMA0.40 point-to-point
ip address < removed >
ip nat inside
ip virtual-reassembly
no snmp trap link-status
pvc 1/40
vbr-nrt 4608 4608
tx-ring-limit 3
max-reserved-bandwidth 100
CMC-TUC-3845#show ima interface
Interface ATM0/IMA0 is up
Group index is 28
Ne state is operational, failure status is noFailure
IMA Group Current Configuration:
Tx/Rx minimum required links 1/1
Maximum allowed diff delay is 25ms, Tx frame length 128
Ne Tx clock mode CTC, configured timing reference link ATM0/0/0
Test pattern procedure is disabled
IMA Group Total Counters (time elapsed 735 seconds):
466572 Tx cells, 629004 Rx cells
1 Ne Failures, 10 Fe Failures, 228 Unavail Secs
IMA link Information:
Link Physical Status NearEnd Rx Status Test Status
---- --------------- ----------------- -----------
ATM0/0/0 up active disabled
ATM0/0/1 up active disabled
ATM0/1/0 up
