From: Banks, Ethan (Ethan.Banks@ChasePaymentech.com)
Date: Wed Jan 16 2008 - 12:34:23 ARST
It's not always recommended to configure max-reserve-bandwidth to 100,
no. Sometimes the situation calls for you to adjust
max-reserved-bandwidth, but you need to be careful when doing so. The
general recommendation is that you leave it alone, at the default of 75.
Normally the router will use the remaining 25% for control-plane
traffic, layer 2 overhead, etc.
If you do change the value to 100, you need to be careful to allocate
some of the bandwidth for the traffic that the router was previously
taking care of for you.
http://www.cisco.com/univercd/cc/td/doc/product/software/ios124/124cr/hq
os_r/qos_m1h.htm#wp1113113
"The sum of all bandwidth allocation on an interface should not exceed
75 percent of the available bandwidth on an interface. The remaining 25
percent of bandwidth is used for overhead, including Layer 2 overhead,
control traffic, and best-effort traffic.
If you need to allocate more than 75 percent for RSVP, CBWFQ, LLQ, IP
RTP Priority, Frame Relay IP RTP Priority, and Frame Relay PIPQ, you can
use the max-reserved-bandwidth command. The percent argument specifies
the maximum percentage of the total interface bandwidth that can be
used.
If you do use the max-reserved-bandwidth command, make sure that not too
much bandwidth is taken away from best-effort and control traffic."
/Ethan - CCIE Candidate Blog
http://www.ethanbanks.net
|-----Original Message-----
|From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On
|Behalf Of Tandou Mohamed
|Sent: Tuesday, January 15, 2008 4:13 PM
|To: ccielab@groupstudy.com
|Subject: Max Reserve Band
|
|Hello GS,
| when configuring service policy on an interface, it is
|always recommend to configure
| MAX-RESERVE-BANDWIDTH 100 ? or it depend on the policy type
|you are applying ?
|
| Thanks,
|
| Mohamed
|
|
|
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