From: Joseph L. Brunner (joe@affirmedsystems.com)
Date: Fri Mar 13 2009 - 09:47:41 ARST
This has never been in an issue in over 100 sites I have worked on, deployed and tested the 6509E, etc.
My experience, no matter how hard you are driving the network (oracle rac, sun backups, Symantec backups, etc) the 6509 always has another 50 to 100Mbps to give...
We once tried this (you'll like this)- a perl script to dump data from 3 Redhat boxes to a single port where a cisco ip phone was on a 6509 Gigabit port... I wanted to convince management to invest the consulting hours in a qos deployment on about 9 6509E's... I could not get the voice call to jitter at all... he was on the phone with me talking fine even under that stress (and the packets it made it there, per span!!!)
Like I said these switches always have something more to give even on the cheaper non-server asic'd blades... seems it doesn't let anyone flow use it all.
-Joe
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of dave dave
Sent: Friday, March 13, 2009 4:47 AM
To: Cisco certification
Subject: [Real World] 6500 QoS making me crazy..:(
Hi Expert,
*Catalyst 6500 Release 12.2SXH *
SERVER-|-ACCESS-Router---L2-link---1g----------|
|
SERVER-|-ACCES-Router---L2-link---1g-------------|---*1g--Dis-SW6500---10g*--------L2-Link--------------------------Core
Router
|
SERVER-|-ACCES-Router---L2-link---1g-------------|
If i configure priority Queue which can take 100% BW, so it means priority
traffic from different Access-Router aggregated to 100% of uplink of
Aggregation switch to Core roure , all other traffic including control plane
will be dropped. Is there is any work around for this. I can only do
hardware-switched QoS.
6500 QoS
http://www.cisco.com/en/US/docs/switches/lan/catalyst6500/ios/12.2SX/configuration/guide/qos.html
6500 QoS Note from above URL
For hardware-switched traffic, PFC QoS does not support the bandwidth,
priority, queue-limit, or random-detect policy map class commands. You can
configure these commands because they can be used for software-switched
traffic.
Does it mean that i need to disable mls switching to do the harware based
swithing. I cant do the software based switching because that will not be
good for the heavy traffic load considering my network, which may put hugh
CPU load on my 6500 aggregation box.
Regards,
Dave
Blogs and organic groups at http://www.ccie.net
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