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MPLS QoS on 7204 VXR with NPE-G1

Hi, I want to prioritize voice traffic which comes in on Gig0/2.30 (marked with ToS 5 (184)) and reserve a bandwidth for it of 5 Mbps (class PREMIUM priority 5000)on tag-switching interface Gig0/1.

Now sh int gig0/1 mpls-exp shows:

GigabitEthernet0/1

Input

Exp Value 0: 38 packets, 3256 bytes

Exp Value 5: 1000 packets, 1522000 bytes

Output

Exp Value 0: 38 packets, 3104 bytes

Exp Value 5: 1000 packets, 1518000 bytes

sh policymap int gig0/1 shows:

GigabitEthernet0/1

Service-policy output: QOS-OUT

Class-map: PREMIUM (match-all)

1000 packets, 1518000 bytes

5 minute offered rate 37000 bps, drop rate 0 bps

Match: mpls experimental topmost 5

Queueing

Strict Priority

Output Queue: Conversation 264

Bandwidth 5000 (kbps) Burst 125000 (Bytes)

(pkts matched/bytes matched) 0/0

(total drops/bytes drops) 0/0

It seems for me that this works, but I expected to see

(pkts matched/bytes matched) 1000/1518000 in stead of 0/0 !?

Does anyone know if this policy-map is working or not ?

Best regards,

Peter

1 ACCEPTED SOLUTION

Accepted Solutions

Re: MPLS QoS on 7204 VXR with NPE-G1

Hello Peter,

a detailed explanation of all counters can be found in "Understanding Packet Counters in show policy-map interface Output"

http://www.cisco.com/en/US/tech/tk543/tk760/technologies_tech_note09186a0080108e2d.shtml

In brief: the counter does not increase, if you have no congestion and the packets are CEF switched. Basically it counts the amount of packets in the L3 queueing system matching the specific class. No congestion means no packets in L3 queueing system, thus (pkts matched/bytes matched) 0/0

Hope this helps! Please rate all posts.

Regards, Martin

1 REPLY

Re: MPLS QoS on 7204 VXR with NPE-G1

Hello Peter,

a detailed explanation of all counters can be found in "Understanding Packet Counters in show policy-map interface Output"

http://www.cisco.com/en/US/tech/tk543/tk760/technologies_tech_note09186a0080108e2d.shtml

In brief: the counter does not increase, if you have no congestion and the packets are CEF switched. Basically it counts the amount of packets in the L3 queueing system matching the specific class. No congestion means no packets in L3 queueing system, thus (pkts matched/bytes matched) 0/0

Hope this helps! Please rate all posts.

Regards, Martin

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