Need help with QoS

[haji_akhundov]

Dear everyone,

I'm trying to setup QoS here but I'm having a problem. It seems that the 'match' does not work. How can I fix this?

This is what I have in the configuration:

class-map match-any VoiceLan

match  dscp af11

match ip dscp af11

match access-group 101

Comment: I used match dscp and match ip dscp just in case, maybe thats why it wasn't working. I also made a access-list, still doesnt catch

!

!

policy-map markVoiceLan

class class-default

  set ip dscp af11

policy-map p_serialqos

class class-default

    shape average 256000

  service-policy serialqos

policy-map serialqos

class VoiceLan

    priority percent 40

class class-default

    fair-queue

!

The markVoiceLan is applied as input on a ethernet port and works great. all packets arriving at that port get marked with dscp af11:

abc#show policy-map interface g0/0.101

GigabitEthernet0/0.101

  Service-policy input: markVoiceLan

    Class-map: class-default (match-any)

      8091 packets, 1547092 bytes

      5 minute offered rate 0 bps, drop rate 0 bps

      Match: any

      QoS Set

        dscp af11

          Packets marked 8091

Now when it comes to an outgoing interface, it does not see it! They all go through class-default:  =(

abcl#show policy-map interface serial 0/1/0.100

Serial0/1/0.100

  Service-policy output: p_serialqos

    Class-map: class-default (match-any)

      93884 packets, 12431112 bytes

      5 minute offered rate 40000 bps, drop rate 0 bps

      Match: any

      Queueing

      queue limit 64 packets

      (queue depth/total drops/no-buffer drops) 0/30/0

      (pkts output/bytes output) 93853/12210601

      shape (average) cir 256000, bc 1024, be 1024

      target shape rate 256000

        lower bound cir 0,  adapt to fecn 0

      Service-policy : serialqos

        queue stats for all priority classes:

          queue limit 64 packets

          (queue depth/total drops/no-buffer drops) 0/0/0

          (pkts output/bytes output) 0/0

        Class-map: VoiceLan (match-any)

          0 packets, 0 bytes

          5 minute offered rate 0 bps, drop rate 0 bps

          Match:  dscp af11 (10)

            0 packets, 0 bytes

            5 minute rate 0 bps

          Match: ip dscp af11 (10)

            0 packets, 0 bytes

            5 minute rate 0 bps

          Match: access-group 101

            0 packets, 0 bytes

            5 minute rate 0 bps

          Priority: 40% (102 kbps), burst bytes 2550, b/w exceed drops: 0

        Class-map: class-default (match-any)

          93883 packets, 12431013 bytes

          5 minute offered rate 40000 bps, drop rate 0 bps

          Match: any

          Queueing

          queue limit 64 packets

          (queue depth/total drops/no-buffer drops/flowdrops) 0/30/0/30

          (pkts output/bytes output) 93853/12210601

          Fair-queue: per-flow queue limit 16

Why is this happenign and how can I fix this?

Appriciate any help!

[haji_akhundov]

I tried bunch of other 'match ...', and it doesn't work. What might be preventing the 'match' command to work?

[John Blakley]

Haji,

Can you post the interface configurations? What model router/switch is this and version of IOS? I labbed this up and don't have the same issue you have unfortunately....

HTH,

John

[haji_akhundov]

Hey John,

Thank you for your reply.

Router:

Cisco IOS Software, 2800 Software (C2800NM-ADVENTERPRISEK9-M), Version 12.4(24)T2, RELEASE SOFTWARE (fc2)

Here it is:

interface GigabitEthernet0/0.101

description voice-lan

encapsulation dot1Q 101

ip address 172.16.16.254 255.255.255.0

ip pim dense-mode

no cdp enable

service-policy input markvoice        //seems to work

interface Serial0/1/0

bandwidth 256

ip address 172.16.254.6 255.255.255.252

ip nat outside

ip virtual-reassembly

service-policy output serialqos // (or p_serialqos)

Thanks!

[John Blakley]

I noticed that you've got the policy applied to s0/1/0, but above you show the stats for s0/1/0.100. Can you post the configuration for s0/1/0.100, or is it not applied there anymore? After I get that config, I could lab this up sometime today to see if I get the same issue...

HTH,

John

[haji_akhundov]

Dear John,

There's no more s0/1/0.100, just s0/1/0. Basically, I had frame relay there, then I thought maybe CBWFQ is not supported by FR so I just reversed back to the default hdlc. Still didn't work. =(

Thanks

[John Blakley]

I was able to lab this up and unfortunately didn't have an issue. Maybe you could update your IOS? I looked but couldn't find a specific bug related to this issue. Below is what I did to get it to work:

Here are the results:

R2#sh policy-map int

FastEthernet0/0.100

  Service-policy input: markAF

    Class-map: class-default (match-any)

      11 packets, 1058 bytes

      5 minute offered rate 0 bps, drop rate 0 bps

      Match: any

      QoS Set

        dscp af11

         Packets marked 11

Serial0/0

  Service-policy output: matchAF

    Class-map: matchAF (match-all)

      5 packets, 520 bytes

      5 minute offered rate 0 bps

      Match:  dscp af11 (10)

    Class-map: class-default (match-any)

      6 packets, 304 bytes

      5 minute offered rate 0 bps, drop rate 0 bps

      Match: any

Here are is my class and policy maps:

class-map match-all matchAF

match  dscp af11

policy-map markAF

class class-default

  set dscp af11

policy-map matchAF

class matchAF

What I would do is remove the policy that you have applied to the serial side. Since you're marking everything, you should change your class map to only match on dscp af11. (I've tested with marking "dscp af11" and then matching on both "dscp af11" and "ip dscp af11".)

In short, try these changes:

• Remove the policy from s0/1/0
• Remove the class map from the policy (you have to to be able to remove the class-map or you'll get an error)
• Remove the class-map VoiceLan
• Then copy and paste this in:

class-map VoiceLan

match ip dscp af11

policy-map serialqos

class VoiceLan

    priority percent 40

class class-default

    fair-queue

Then reapply the policy and retest. Let me know how it goes

HTH,

John

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[haji_akhundov]

Thank you John!

I am very happy to see that it works on your router. I've also tried this on another pair of routers and it worked there.

But not on this one omg :/

I will do what you suggested as soon as I get the connection back with the router and will update you here. (It is somewhere in the sea)

ttyl

Haji

[John Blakley]

Thanks Haji! I look forward to hearing from you

[haji_akhundov]

John,

I tried everything. I even updated the IOS. Still not working ://

Regards

Haji