Hi - I have a router configured with ATM IMA & 3 X ATM 2Mbps circuits which never reaches it's max 6Mbps bandwidth. I fully understand about IMA & ATM overhead and that I should not reach 6Mbps however I am only reaching 4.6Mbps. The router does have qos but the same problem occured before the qos was added. This problem also occurs on antoher IMA router elsewhere so I'm pretty sure it's not a code or hardware error. Here's the IMA config:
network-clock-participate wic 0
network-clock-participate wic 1
network-clock-participate aim 1
network-clock-select 1 E1 0/0
network-clock-select 2 E1 0/1
network-clock-select 3 E1 0/2
controller E1 0/0
mode atm aim 1
!
controller E1 0/1
mode atm aim 1
!
controller E1 0/2
mode atm aim 1
!
interface ATM0/0
no ip address
scrambling-payload
ima-group 1
no atm ilmi-keepalive
no fair-queue
interface ATM0/1
no ip address
scrambling-payload
ima-group 1
no atm ilmi-keepalive
no fair-queue
interface ATM0/2
no ip address
scrambling-payload
ima-group 1
no atm ilmi-keepalive
no fair-queue
!
interface ATM0/IMA1
no ip address
ip accounting precedence input
ip accounting precedence output
ip route-cache flow
no atm ilmi-keepalive
service-policy output qos
!
interface ATM0/IMA1.100 point-to-point
ip address x.x.x.x 255.255.255.252
ip accounting precedence input
ip accounting precedence output
ip nbar protocol-discovery
pvc 1/100
vc-hold-queue 1024
encapsulation aal5snap
Can you see any obvious mistakes that would explain the problem, or do you know of any known IMA additional configuration that may be required?
