With default policy on ME 3400 switches, you can observe some problems with burst traffic coming from GigE interface. This is due to default queue-limit setting. Here is an example,how to increase it and use with triple play policy on customer’s port:
policy-map qosout
description OUTPUT POLICY-MAP
class VOIP
priority
class IPTV
bandwidth remaining percent 80
queue-limit 272
class JUNK
bandwidth remaining percent 10
policy-map shap
description OUTPUT SHAPING
class class-default
shape average 34000000
service-policy qosout
int fast 0/1
service output shap