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rshoker99
Beginner

NBAR Implmentation on 3550 Citrix performance

Hi,

I was wondering if the 3550 Switch Supported Nbar. I doesn't look like it but I really need it to see why our citrix servers clients are not getting lags.

I have a 3350 with 4 vlans routed through a 10 MB Wan ethernety link provided by the ISP.

The latency is 29 ms which way within Citrix client parameters. I checked and setup tested the mtu size with citrix servers and changed the clients to mtu size of 1000. Which does not fragment.

Any information would helpfull.

Thanks

Raj

3 REPLIES 3
smothuku
Rising star

Hi Raj ,

3550 doesn't support NBAr feature due to the hardware limitation.

Additinal Info:

One of the limitations on the Cat3550 is that "The only match criterion in a policy map that can be attached to an egress

interface is the match ip dscp dscp-list class-map configuration command":

http://www.cisco.com/univercd/cc/td/doc/product/lan/c3550/12225see/cr/cli1.htm#wp1864211

Also, "You cannot use the service-policy interface configuration command to attach policy maps that contain these elements to an egress interface:

*set or trust policy-map class configuration commands. Instead, you can use the police policy-map class configuration command to mark down (reduce) the DSCP value at the egress interface.

*Access control list (ACL) classification.

*Per-port per-VLAN classification.":

http://www.cisco.com/univercd/cc/td/doc/product/lan/c3550/12225see/cr/cli2.htm#wp3418068

Last, not least, LLQ is not supported on the Cat3550 platform.

Here are some useful links regarding the QoS options on the Cat3550 platform:

Configuration Guide:

http://www.cisco.com/univercd/cc/td/doc/product/lan/c3550/12225see/scg/swqos.htm

Understanding QoS Policing and Marking on the Catalyst 3550:

http://www.cisco.com/en/US/products/hw/switches/ps646/products_tech_note09186a00800feff5.shtml

Hope it helps you.

Thanks,

satish

rshoker99
Beginner

Satish,

Thank you. This really helps.

Raj

glen.grant
Advisor

If the wan is a ethernet link you should check with the provider to see if the link will run 10/full if it is currently running 10/half . A 10/half link will start to see degradation at any levels above about 30-35% utilization .