How to tell if your policy-map is dropping packets?

Run the following command on the interface that you have the policy. The below example is applied outbound and has given classes of traffic a set amount of bandwidth, other classes simply match the DCSP markings to validate packets with those markings are leaving the router

show policy-map interface serial 0/0/0

Service-policy output: WAN-Outbound

queue stats for all priority classes:
Queueing
queue limit 64 packets
     (queue depth/total drops/no-buffer drops) 0/141160/0
(pkts output/bytes output) 178961385/27251094493

Class-map: Seven (match-all)
0 packets, 0 bytes
30 second offered rate 0 bps
Match:  precedence 7

Class-map: Six (match-all)
2049895 packets, 365732733 bytes
30 second offered rate 3000 bps
Match:  precedence 6

Class-map: Five (match-all)
179102552 packets, 27386337382 bytes
30 second offered rate 130000 bps, drop rate 0 bps
Match:  precedence 5
Priority: 12% (184 kbps), burst bytes 4600, b/w exceed drops: 141160

Class-map: Four (match-all)
8258473 packets, 503922161 bytes
30 second offered rate 3000 bps, drop rate 0 bps
Match:  precedence 4
Queueing
queue limit 64 packets
(queue depth/total drops/no-buffer drops/flowdrops) 0/153/0/153
(pkts output/bytes output) 8258320/503701910
bandwidth 9% (138 kbps)
Fair-queue: per-flow queue limit 16

Class-map: Three (match-all)
12140601 packets, 2266058800 bytes
30 second offered rate 10000 bps, drop rate 0 bps
Match:  precedence 3
Queueing
queue limit 64 packets
(queue depth/total drops/no-buffer drops/flowdrops) 0/2869/0/2869
(pkts output/bytes output) 12137732/2229606633
bandwidth 55% (844 kbps)
Fair-queue: per-flow queue limit 16

Class-map: class-default (match-any)
78037660 packets, 16987734544 bytes
30 second offered rate 143000 bps, drop rate 0 bps
Match: any
Queueing
queue limit 64 packets
(queue depth/total drops/no-buffer drops/flowdrops) 0/89674/0/89674
(pkts output/bytes output) 183823669/37946247183
Fair-queue: per-flow queue limit 16

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About Scape

Over 10 Years in the networking field. Have worked in the Service provider and Enterprise environments. I have worked with Cisco, Foundry/Brocade, F5, Riverbed, Scientific Atlanta, Routers, Switches, Firewalls, Load Balancers, WAN Accelerators, DWDM, SONET, Multicast etc...

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