Full Duplex-Half Duplex 1

[Grenage]

Afternoon,

Our switch is a ProCurve with 3x 24 port modules and 1 empty module spot.

Our File Server has a Dual-Port Intel Pro 10/100 card in it and is being used for "adapter teaming" to increase bandwidth.

The cable is good quality solid shielded Belkin and runs to a wall socked at both the switch and the server, where 1m patch leads are used to connect.

Both the Switch and the Server are set to 100 FDX and the connection seems to be a decent speed for our purposes.

My concern is that while looking at the Switch Manager it shows an RX Error count of 26800 for Server Port 1 and 1697 for Server Port 2 (I am assuming the lower error count on Port 2 is due to there being less traffic.
Some other ports for workstations do have a fair error count aswell, although I have checked the crimps and cables and they seem to be ok.

Does anybody have any thoughts on why I might be getting so many of these ?

Hope I explained myself clearly enough. Thanks again.

 

[bcastner]

Some of what you see is normal.

You might check at the client side of things and specify the speed and duplex mode setting rather than depending on Auto-negotiation by the client and switch.

If your cable plant is decent CAT5 stuff, set all the clients manually to 100 Full Duplex, and do not depend on them being able to auto negotiate the same setting. The odds are that many are failing to auto-negotiate appropriately.

 

[Grenage]

Thankyou

 

[patrckb]

bcastner, I disagree that errors are normal.

Collisions in a shared hub environment are normal.

Errors in a switched environment are not.

I do agree that auto-negotiate is not as wonderful as we would like. I tell people that it works 90% of the time. The other 10% have to be manually configured.

Cisco recommends in their thesis about auto-negotiate problems ("Configuring and Troubleshooting Ethernet 10/100/1000Mb Half/Full Duplex Auto-Negotiation"

http://www.cisco.com/warp/public/473/3.html)

to either a) run auto-negotiate on both the switch side and the host side or b) don't run auto-negotiate on either side.

My experience is that most problems occur when one side is set for auto-negotiate and the other is not.

HTH,
Patrick

Patrick Bartkus, CCNP, CNX, SCM Sr. Network Engineer
GA Dept of Labor IT Network Services
If truth were not absolute, how could there be justice?

 

[bcastner]

Patrick,

You are assuming that all traffic is local traffic. I am not.