From: Bob Sinclair (bsinclair@netmasterclass.net)
Date: Tue Jan 16 2007 - 15:17:47 ART
Dave and all:
Correction to earlier:
Shaped weights both reserve and limit, whereas shared weights just reserve.
The shaped queue weights are not considered in the shared weight
calculation. The ratio of the shared weights determines the relative
bandwidth allocations of the bandwidth remaining after the shaped
reservation.
Imagine this example on a 100 Mbs link:
srr-queue bandwidth shape 2 0 0 0
srr-queue bandwidth share 1 2 2 1
I believe these would be the resulting reservations, in terms of Mbs:
Queue 1: 50 Mbs (reserved and limited 1/2 times 100 Mbs)
Queue 2: 20 Mbs (reserved 20/(20 + 20 + 10) times 50 Mbs)
Queue 3: 20 Mbs (reserved 20/(20 + 20 + 10) times 50 Mbs)
Queue 4: 10 Mbs (reserved 10/(20 + 20 + 10) times 50 Mbs)
Difficult to verify in practice.
HTH,
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
david robin
Sent: Tuesday, January 16, 2007 9:06 AM
To: Cisco certification
Subject: 3560 help me please
Dear all,
I can't understand some issus in SRR shaping and sharing in 3560 switch, the
doc CD said that shaped configuration override sharing, and the default
configuration is as follow for the 4 queues
SRR shaped weights (absolute)
1<http://www.cisco.com/univercd/cc/td/doc/product/lan/cat3560/12235se/scg1/s
wqos.htm#wp1202389>
25
0
0
0
SRR shared weights
2<http://www.cisco.com/univercd/cc/td/doc/product/lan/cat3560/12235se/scg1/s
wqos.htm#wp1202394>
25
25
25
25
now in case that I confugre q1 to be 8% insetead of 25 %, this mean that
this queue will be limited to 1/8 percent of the total bandwidth, up to this
limit that's fine.
now the others queues will share the bandwidth based on their SRR shared
level,
the question is
does queue 1 enter the shared calculation
on other words the calculation for queue 2 for example will be:
25/(25+25+25+25)
or
25/(25+25+25) and ignoring queue 1 weight
and what is the case if I configure shape for example o a big value 50% what
will be the situation
thanks in advance,
This archive was generated by hypermail 2.1.4 : Thu Feb 08 2007 - 23:46:56 ART