CAT Marking, was RE: FR Traffic Shaping Question

From: Bob Sinclair (bob@bobsinclair.net)
Date: Mon Nov 20 2006 - 15:15:25 ART

Hi Salman,

 

Your configuration for per-port, per-VLAN marking looks right to me, and I
tested it on both an access and trunk port.

 

 It can be applied to an access port, as you have, but it seems unnecessary
to specify the VLAN here, since all the traffic will be VLAN 10. Might make
more sense on a trunk port.

 

Alternatively, you could set the default CoS to 5, and the default maps
would write layer 3 to CS5, DSCP 40:

 

Int f0/1

 mls qos CoS 5

 mls qos CoS override

 

 

HTH,

 

 

Bob Sinclair

CCIE 10427 CCSI 30427

www.netmasterclass.net

 

  _____

From: Salman Abbas [mailto:dukelondon@gmail.com]
Sent: Monday, November 20, 2006 11:33 AM
To: Bob Sinclair
Cc: ccie >> Cisco certification
Subject: Re: FR Traffic Shaping Question

 

Hi Bob,

 

Thanks a bunch for the reply and the link. I've got another question. Hope
you would help me answer this one too.

 

This question is about Traffic Classification on a Per-Port-Per-VLAN Basis
using Class maps

 

My switch's port fa0/1 is assigned to VLAN 10. I want to Mark all packets on
VLAN 10 with IP precedence critical.

 

As per Cisco's documentation on this, I configured it as follows: (Pls
correct me if I've configured it wrongly)

 

mls qos

 

class-map match-all TRAFFIC

  match access-group 1

 class-map match-all Per-Port
  match vlan 10
  match class-map TRAFFIC
!
policy-map QoS
  class Per-Port
   set precedence 5

 

access-list 1 permit any

 

int fa0/1

service policy input QoS

 

 

 

 

Thanks in advance,

 

cheers!!!

 

Salman

 

On 11/20/06, Bob Sinclair <bob@bobsinclair.net> wrote:

Troy,

I only see two rates mentioned, 128K and 48K. So I would interpret 128K as
the CIR, with no excess burst. I would put the mincir at 48K (since that is

the value you do not want to throttle below) and the Bc at 16K.

You have probably seen this one, but here is a good link on the topic:

http://www.cisco.com/warp/public/125/traffic_shaping_6151.html

HTH,

Bob Sinclair
CCIE 10427 CCSI 30427
www.netmasterclass.net

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Salman Abbas
Sent: Monday, November 20, 2006 4:32 AM
To: ccie >> Cisco certification
Subject: FR Traffic Shaping Question

Hi Guys,

Pls help in answering the following question:

Configure your router's interface s0 running FR for *RATE
LIMITING*according to the following information:

maximum throughput (AR) is 128kbps
                               TC is 125 ms

Provider will *mark any traffic in excess* of 48kbps *as* *discard eligible*
Hence, *make sure throughput changes accordingly*, but based on *BECNs
received ONLY*.

Now taking the information mentioned above into consideration, what would be
my:

CIR
Bc
Be
mincir

I came up with the following answer but please correct me if I'm wrong

map-class frame-relay FRTS
frame-relay cir 48000
frame-relay bc 6000
frame-relay be 10000
frame-relay mincir 24000
frame-relay adaptive-shaping becn

int s0
frame-relay traffic-shaping
frame-relay class FRTS

Thanks in advance,

Cheers!!!

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