qos , Apply service-policy for ATM interface

[niloo_adeli]

when apply service-policy under atm interface like below, the traffic that cross over tunnel have been time out and we have high ping reply ,after we unattach service-policy under atm and attach again will be correct work for some day.

interface ATM0/0/0
bandwidth 512
no ip address
no atm ilmi-keepalive
bridge-group 1
pvc 0/35
vbr-nrt 512 512 1
encapsulation aal5snap
service-policy out POLICY-QOS-BRANCH

!

interface BVI1
bandwidth 512
ip address 1.1.1.1 255.255.255.252
!

interface Tunnel91
bandwidth 512
ip address 3.3.3.3 255.255.255.0
no ip redirects
ip mtu 1460
ip nhrp group spoke_group512
ip tcp adjust-mss 1436
load-interval 30
delay 90
qos pre-classify
keepalive 10 3
tunnel source 1.1.1.1
tunnel destination 172.172.172.1

!

policy-map POLICY-QOS-BRANCH
class CLASS-CORE
bandwidth percent 80
class CLASS-Medium
bandwidth percent 10
class class-default
fair-queue

[Georg Pauwen]

Hello,

try and apply the service policy to the BVI:

interface BVI1
 bandwidth 512
 ip address 1.1.1.1 255.255.255.252
 service-policy out POLICY-QOS-BRANCH

[Joseph W. Doherty]

How/why did you chose the IP MTU and adjust-mss size combo you have for tunnel 91?

If service policy appears to work differently after detaching and reattaching, I wonder if you've bumped into some bug/