[116800] in North American Network Operators' Group
RE: F5/Cisco catalyst configuration question
daemon@ATHENA.MIT.EDU (Christopher Greves)
Wed Aug 19 13:42:22 2009
From: Christopher Greves <Christopher.Greves@mindspark.com>
To: 'Scott Spencer' <scott@dwc-computer.com>, "nanog@nanog.org"
<nanog@nanog.org>
Date: Wed, 19 Aug 2009 13:41:11 -0400
In-Reply-To: <C2A7749E37AC4E9F99850A952B25778D@HPWORKSTATION>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
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 necessaril=
y explains why you aren't seeing a link light on the LTM though. I can't re=
member 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 n=
egotiate into dot1q.
Chris
Christopher Greves=A0 |=A0=A0Senior Systems Engineer
One North Lexington Ave, 9th Floor - White Plains, NY 10601
T=A0914-826-2067=A0 |=A0 C=A0914.420.8340=A0 |=A0 E christopher.greves@mind=
spark.com
=A0
Mindspark Interactive Network, Inc. is an IAC company.
-----Original Message-----
From: Scott Spencer [mailto:scott@dwc-computer.com]=20
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 , hav=
e
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 wit=
h
the 6500.
=20
Any suggestions what to try?
=20
Best regards,
=20
Scott Spencer
Data Center Asset Recovery/Remarketing Manager
Duane Whitlow & Co. Inc.
Nationwide Toll Free: 800.977.7473. Direct: 972.865.1395 Fax: 972.931.334=
0
<mailto:scott@dwc-computer.com> scott@dwc-computer.com
<http://www.dwc-it.com/> www.dwc-it.com=20
Cisco/Juniper/F5/Foundry/Brocade/Sun/IBM/Dell/Liebert and more ~ =20
=20
