[c-nsp] Auto Negotiate

[Chuck Church]

Since it sounds like DHCP is involved, is spanning tree portfast enabled on
the ports?  I agree with Nick, auto-neg probably isn't broken, unless some
config was put on the interface to intentionally break it.

Chuck

-----Original Message-----
From: cisco-nsp [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Nick
Hilliard
Sent: Wednesday, June 05, 2013 10:20 AM
To: Harry Hambi
Cc: 'cisco-nsp at puck.nether.net'
Subject: Re: [c-nsp] Auto Negotiate

On 05/06/2013 15:07, Harry Hambi wrote:
> Been having some strange issues recently regarding auto negotiate. The 
> switches in questions are 6509 running IOS 12.2<17r>SX3, and 3750 
> stack IOS 12.2.<53r>SE1. Some pc's connected to ports on these 
> switches will not get an IP address when configured to auto..

12.2(17r) is the boot-rom version.  You can get the operating software
revision using:

Router#show version | i s72033

> changed the Network Adapter Link Speed from Auto Neg to 100 meg Full 
> ...pc aquires IP, Changed to 100 meg Half, pc works.
> Port states show no errors, tried changing ports on switch no change.
> Any ideas appreciated.

I could check the cabling.  I.e. with a proper cable certification tester.
 If that's not the problem it could be crappy drivers or crappy ethernet
cards.  Cisco autoneg works pretty well on both c6500 and c3750 hardware
these days (although it is completely broken on several older units).

Nick

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