I am trying out a new QOS map and ran into dropped packets on our second site. The first site I implemented this on is working with no packet loss. The second site has two routers and both are randomly dropping packets. All sites are running Cisco 3925 routers with DS3 encap PPP circuits. First site has one router and the other has two routers. The packet loss does not seem to be service affecting, but we shouldn't be seeing any packet loss, as the circuits haven't gone over 20% utilization.
Any comments or suggestions would be greatly appreciated. Below is the config added and show policy-map:
class-map match-any AF4x
match ip dscp af41
class-map match-any AF3x
match ip dscp af31
class-map match-any AF2x
match ip dscp af21
class-map match-any Voice
match ip dscp ef
class-map match-any Scavenger
match ip dscp cs1
class-map match-any AFclass
match ip dscp af21 af31 af41
police rate percent 20
exceed-action set-dscp-transmit af42
police rate percent 5
exceed-action set-dscp-transmit af32
police rate percent 5
exceed-action set-dscp-transmit af22
priority percent 10
bandwidth percent 25
police rate percent 4
exceed-action set-dscp-transmit default
bandwidth percent 50
shape average 44210000
service-policy output Shape
sh policy-map int s 1/0 | inc Class|offered|drops
Class-map: class-default (match-any)
30 second offered rate 5141000 bps, drop rate 0 bps
(queue depth/total drops/no-buffer drops) 0/123/0
(queue depth/total drops/no-buffer drops) 0/35/0
Class-map: Voice (match-any)
30 second offered rate 4611000 bps, drop rate 0 bps
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It's possible drops are due to microbursts and insufficient queue depths.
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