Re: CB-GTS with CB-WFQ using NBAR

 I just tried implementing CB-GTS myself and it seems to be working fine.

R1#show run | s class|policy|service-policy|interface Serial1/0

class-map match-all R4R5
 match fr-dlci 102
 match protocol icmp

policy-map GTS
 class R4R5
   drop

policy-map SHAPE
 class class-default
  shape average 8000
  service-policy GTS

interface Serial1/0
 service-policy output SHAPE

*Checking ping via DLCI 102:*

 R4#ping 25.25.25.5

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 25.25.25.5, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)

*Checking ping via DLCI 103 *

R4#ping 36.36.36.6

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 36.36.36.6, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 44/58/64 ms

 *Checking matches in service policy on the interface:*

R1#show policy-map inter ser1/0

 Serial1/0

  Service-policy output: SHAPE

    Class-map: class-default (match-any)
      24 packets, 1680 bytes
      5 minute offered rate 0 bps, drop rate 0 bps
      Match: any
      Traffic Shaping
           Target/Average Byte Sustain Excess Interval Increment
             Rate Limit bits/int bits/int (ms) (bytes)
             8000/8000 2000 8000 8000 1000 1000

        Adapt Queue Packets Bytes Packets Bytes Shaping
        Active Depth Delayed Delayed Active
        - 0 11 1048 0 0 no

      Service-policy : GTS

        Class-map: R4R5 (match-all)
          *5 packets, 520 bytes*
          5 minute offered rate 0 bps, drop rate 0 bps
          Match: fr-dlci 102
          Match: protocol icmp
          *drop*

        Class-map: class-default (match-any)
          19 packets, 1160 bytes
          5 minute offered rate 0 bps, drop rate 0 bps
          Match: any

best regards,
Arseniy S. Ivanov

On 16.03.2014 20:08, Sam Bibby wrote:

Hey all,

Every time i think I have a grasp on QoS I hit more issues.

Firstly here is what I think I know (don't worry, its not much.. random
numbers used, typos excused)

1) When you setup just QoS using the MQC you can match protocols under
class-maps via NBAR example:

!
class-map CMAP_ICMP
 match proto icmp
!
policy-map PMAP_ICMP
 class CMAP_ICMP
  priority 54 4000
!

2) When you shape you use the CB-GTS to shaping as follows:
!
policy-map PMAP_SHAPE
 class class-default
  shape ave 51200 8000 0
!

Ok, so what gives here & my question(s) arise.

1) If i want to then use my CBWFQ policy that uses NBAR matching I cannot
nest this inside a CB-GTS like so;

!
policy-map PMAP_SHAPE
 shape ave 51200 8000 0
 service-policy PMAP_ICMP
!

*note i was applying this to a sub-interface fe0/0.1 if that is why I had
problems.

2) To make this work, I need to change my CBWFQ policy so that it does not
use NBAR matching as follows:

!
ip access-list ext ACL_ICMP
 permit icmp any any
!
class-map CMAP_ICMP
 match access-gro ACL_ICMP
!

*And this now will nest happily under the CB-GTS.

So, and thanks for sticking with me, what I want to know is, is this
statement true:

*When performing CB-GTS (regardless of interface) you cannot nest a CB-WFQ
policy that uses NBAR matching.....*

I have done my googling, but you know I find it easier to write this out,
helps me visualize the problem.

If you can put me right, I would be most grateful.. :)

Your pal,

\Sam

Blogs and organic groups at http://www.ccie.net
Received on Sun Mar 16 2014 - 21:35:42 ART