RE: congestion management bandwidth/priority

From: Bob Sinclair (bob@bobsinclair.net)
Date: Sat Dec 02 2006 - 15:00:46 ART


JB,

I would recommend the bandwidth command, rather than priority. For
priority, I would expect a requirement that mentions minimal delay or
jitter. Also, the priority will police SMTP to 1.5 M under congestion. I
see no such requirement in the task.

HTH,

Bob Sinclair
CCIE 10427 CCSI 30427
www.netmasterclass.net

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of JB
Sent: Saturday, December 02, 2006 12:51 PM
To: ccielab@groupstudy.com
Subject: congestion management bandwidth/priority

Hi, I am doing a QoS question that asks to "guarantee at least 1.5Mbps
of the output Queue on the interface"

Using bandwidth:

policy-map SMTP
 class SMTP
  bandwidth 1500

Rack1R5#sh policy-map
  Policy Map SMTP
    Class SMTP
      Bandwidth 1500 (kbps) Max Threshold 64 (packets)

Using priority:

policy-map SMTP
 class SMTP
  priority 1500

Rack1R5#sh policy-map
  Policy Map SMTP
    Class SMTP
      Strict Priority
      Bandwidth 1500 (kbps) Burst 37500 (Bytes)

What I can see from the output is that both reserve 1500kbps
bandwidth. With the priority however it is guarenteed the LLQ. Do both
of these satisfy what the question is asking for?

TIA

JB



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