Hi there,
I have configured the qos below on my cisco 7609 router:
class-map match-any REALTIME
match mpls experimental topmost 5
match precedence 5
match ip dscp cs3 ef
class-map match-any CONTROL
match mpls experimental topmost 6 7
match precedence 6 7
match ip dscp cs6 cs7
class-map match-any Gold
match mpls experimental topmost 4
match precedence 4
match ip dscp cs4 af41 cs6
class-map match-any SILVER
match mpls experimental topmost 1 2
match precedence 1 2
match ip dscp af11 cs2 af21 af31
!
policy-map CORE_Egress
class PE-REALTIME
priority
police rate percent 70
conform-action transmit
exceed-action drop
class PE-CONTROL
bandwidth remaining percent 4
class PE-GOLDEN
bandwidth remaining percent 70
class PE-SILVER
bandwidth remaining percent 20
class class-default
bandwidth remaining percent 5
Based on the MRTG graph, my link was peak at 70% and normally it remains below 40%. But, I noticead that my default qos class was dropping packet because the queue-limit was set to 2 packet by deafult. After, changed it to 50 packets, the default was no longer dropping packet.
My question is my link is not congested, but, what caused the queue-depth of 2 packets being overflow until it started to drop packet?
How do I know what kind of incoming traffic speed that will fill up the default queue depth of 2 packets?
