F5/Cisco catalyst configuration question

Dylan Ebner dylan.ebner at crlmed.com
Thu Aug 20 12:36:19 CDT 2009


This couldn't be something as simple as a crossover cable, could it?

 

-----Original Message-----
From: Scott Spencer [mailto:scott at dwc-computer.com] 
Sent: Thursday, August 20, 2009 11:24 AM
To: 'Darren Bolding'; 'Christopher Greves'
Cc: nanog at nanog.org
Subject: RE: F5/Cisco catalyst configuration question

Darren,
 
It's the F5-BIG-LTM-6400, pair of them.
Thanks for your info. Got alot of good, helpful responses.
 
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:scott at dwc-computer.com> scott at dwc-computer.com <http://www.dwc-it.com/> www.dwc-it.com 
Cisco/Juniper/F5/Foundry/Brocade/Sun/IBM/Dell/Liebert and more ~   
 

  _____  

From: packetmonger at gmail.com [mailto:packetmonger at gmail.com] On Behalf Of Darren Bolding
Sent: Wednesday, August 19, 2009 6:58 PM
To: Christopher Greves
Cc: Scott Spencer; nanog at nanog.org
Subject: Re: F5/Cisco catalyst configuration question


What model BIG-IP? 

On some models I have had to set the BIG-IP's or the 6500 (can't remember
which) to specified speed/duplex and the other side to auto.

I believe it was auto on the BIG-IP and fixed on the 6500.

Setting both sides the same did not work.


On Wed, Aug 19, 2009 at 10:41 AM, Christopher Greves <Christopher.Greves at mindspark.com> wrote:


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 at mindspark.com
 
Mindspark Interactive Network, Inc. is an IAC company.




-----Original Message-----
From: Scott Spencer [mailto:scott at dwc-computer.com]
Sent: Wednesday, August 19, 2009 1:13 PM
To: nanog at 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:scott at dwc-computer.com> scott at dwc-computer.com <http://www.dwc-it.com/> www.dwc-it.com Cisco/Juniper/F5/Foundry/Brocade/Sun/IBM/Dell/Liebert and more ~







-- 
--  Darren Bolding                  --
--  darren at bolding.org           --






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