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.gre...@mindspark.com Mindspark Interactive Network, Inc. is an IAC company. -----Original Message----- From: Scott Spencer [mailto:sc...@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 <mailto:sc...@dwc-computer.com> sc...@dwc-computer.com <http://www.dwc-it.com/> www.dwc-it.com Cisco/Juniper/F5/Foundry/Brocade/Sun/IBM/Dell/Liebert and more ~
