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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Cisco/Juniper/F5/Foundry/Brocade/Sun/IBM/Dell/Liebert and more ~
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.
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.
Darren Bolding wrote:
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.
We have some F5 3400s. No issues with getting link up, but have had
issues with etherchannels. Our F5 admin wanted to run LACP, but we have
had some issues.
3400 to Cat3750 seems to work okay, doesn't always like both ends
'active' as per Cisco recommended lacp settings.
3400 to Cat3750E we couldn't initially get LACP up in any case, but it
maybe have been a flaky switch (had stack port issues), haven't tried
again since the replacement.
Seems to be fine with raw etherchannel (channel-group xx mode on).
Anyone have "smarter" etherchannels running F5-to-Catalysts ?
Jeff
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@dwc-computer.com> scott@dwc-computer.com
<http://www.dwc-it.com/> www.dwc-it.com
Cisco/Juniper/F5/Foundry/Brocade/Sun/IBM/Dell/Liebert and more ~
This couldn't be something as simple as a crossover cable, could it?
That is what I was thinking when I first read your email. I would agree
with Darren.
CL
Yes, I'm running LACP between SUP-720 6500s and BIG-IP 6900 boxes on
the SFP interfaces. The key was to disable ethernet flow control on
the BIG-IP side. They enable it by default and it really confuses the
Cisco side.
After disabling flow control on the BIG-IP's physical interfaces, LACP
came up just fine.