RE: F5/Cisco catalyst configuration question

[Christopher Greves <Christopher.Greves () mindspark com>]

Scott,

We've had issues in the past with IOS 6500's auto-negotiating uplink ports with an LTM into ISL Trunk mode. This only 
occurred when we had the port on the LTM configured as a tagged interface. It was easily solved by forcing the port on 
the 6500 into dot1q encapsulation. I'm not sure this necessarily explains why you aren't seeing a link light on the LTM 
though. I can't remember what the interface status was on both sides. This does correlate to why it's working on the 
2950's as they don't support ISL and would likely negotiate into dot1q.

Chris


Christopher Greves  |  Senior Systems Engineer
One North Lexington Ave, 9th Floor - White Plains, NY 10601
T 914-826-2067  |  C 914.420.8340  |  E christopher.greves () mindspark com
 
Mindspark Interactive Network, Inc. is an IAC company.



-----Original Message-----
From: Scott Spencer [mailto:scott () dwc-computer com] 
Sent: Wednesday, August 19, 2009 1:13 PM
To: nanog () nanog org
Subject: F5/Cisco catalyst configuration question

Trying to link an F5 Local Traffic Manager with a Cisco Catalyst 6500 , have
matched ports (speed,duplex ect..) but no link light at all on the F5. Does
link with a Cisco 2950 switch in between but I need a direct connection with
the 6500.
 
Any suggestions what to try?
 
Best regards,
 
Scott Spencer
Data Center Asset Recovery/Remarketing Manager
Duane Whitlow & Co. Inc.
Nationwide Toll Free: 800.977.7473.  Direct: 972.865.1395  Fax: 972.931.3340
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