Cisco PA-2FE-TIX ISL and HP2524 J4813A

[Marcel Stutz]

I have a strange Problem, i replace all part but i dont have any Idea to fix it now.

I get a Cisco PA-2FE-TX ISL Module on a Cisco 7206VXR Router this Port is Connectet to a HP 2524 Switch on Port 7. The Cisco Module Support only 100MBit Full or Half Duplex i set my Cisco Module to 100Mbit Full Duplex. The HP 2524 see always 100MBit Half Duplex. Okay then i set the the HP2524 FIX to 100MBit Full Duplex, the Connection still work. but my Event Log is groving very fast with this Message.

W 08/19/04 09:17:27 FFI: port 7-Excessive late collisions.
W 08/19/04 09:17:59 FFI: port 7-Excessive late collisions.
W 08/19/04 09:19:12 FFI: port 7-Excessive late collisions.
W 08/19/04 09:20:36 FFI: port 7-Excessive late collisions.
W 08/19/04 09:20:57 FFI: port 7-Excessive late collisions.
W 08/19/04 09:21:39 FFI: port 7-Excessive late collisions.

Also my Port Status has a lot of Error.

Status and Counters - Port Counters - Port 7

Name :

Link Status : Up

Bytes Rx : 567,214,386 Bytes Tx : 917,237,436
Unicast Rx : 424,886,883 Unicast Tx : 100,396,557
Bcast/Mcast Rx : 2428 Bcast/Mcast Tx : 19,027

FCS Rx : 4 Drops Tx : 8409
Alignment Rx : 4 Collisions Tx : 1,011,177
Runts Rx : 0 Late Colln Tx : 165,721
Giants Rx : 0 Excessive Colln : 0
Total Rx Errors : 8 Deferred Tx : 1,343,928

Follow things are done now with no positive Solution.

Cisco Module PA-2FE-TX ISL replace
Cable Replace
HP2524 Port Change

Do someweher has a idea to fix this ? What i need is a 100MBit FullDuplex Connection.

[Stuart Teo]

What is your IOS version? How did you force your router to go full duplex? By issuing the command 'full-duplex' in the interface?

[Marcel Stutz]

@Hwee Liang Teo

I use this Cisco IOS Version.

Cisco Internetwork Operating System Software
IOS (tm) 7200 Software (C7200-P-M), Version 12.2(18)S4, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2004 by cisco Systems, Inc.
Compiled Wed 25-Feb-04 00:08 by ccai
Image text-base: 0x60008FE0, data-base: 0x6151E000

And this is my Setting of my Interface.

!
interface FastEthernet4/0
description Transit SolNET AS9044
bandwidth 1250000
no ip address
no ip proxy-arp
no ip mroute-cache
duplex full
no ipv6 mfib fast
no cdp enable
!
interface FastEthernet4/0.560
description Transit SolNET AS9044
bandwidth 1250000
encapsulation dot1Q 560
ip address xxx.xxx.xxx.xxx xxx.xxx.xxx.xxx
no ip proxy-arp
no ip mroute-cache
no cdp enable
!

I hope this will help to fix my Problem.

regards marcel

[Carsten M]

why do you have the bandwith statement in your router- config?
late collision are often with faulty hardware or to long cable.

carsten

[Marcel Stutz]

@Carsten Meyer

The reason about bandwidth 1250000 is taht my MRTG get the right Infos out form the Interface.

Hardware is replace if i use a 3Com Switch or a Cisco Switch then i dont have this big Errors and Messages.

Cable is 2Meter direct from Device 2 Device also not a cable size Problem.

Marcel

[Stuart Teo]

It sounds like you might have a faulty port or faulty switch. Did you try a different 2524?

[Marcel Stutz]

@Hwee Liang Teo

Today i also replace the Switch with no Solution, for me i think the 2524 and the PA-2FE-TX ISL not works together.

Is this realy possible or cut be this a Software Bug on the 2524 Switch ?

Marcel

[Anton Visser]

Hello Marcel,

I have seen this before. It seems that full duplex on the HP switch is not Full duplex: since the counters are telling you it is working on half duplex: collisions are only seen in half duplex mode. You can either set the port in auto (and also the cisco!) or in half dulpex. It seems that the half and full duplex are reversed.

On the cisco side I haven't had any problems.

[Marcel Stutz]

@Anton Visser,

On the Cisco Side i have only Half or Full Duplex no AUTO.

The HP is set to AUTO i also change it to Full but always the same Problem. What is your sugesion ?

[Anton Visser]

Hello Marcel,

Normal behavior is:

Auto - Auto will result in Full - Full or Half - Half.

Auto - Half will result in Half - Half

Auto - Full will result in Half - Full : duplex mismatch!

Automatic had problems in the past so it is adviced to make a fixed setting. But... sometimes these fixed settings are not fixed or they are reversed: Hals is Full and Full is Half.

If You set the port on the HP procurve to Full duplex it is impossible to get collissions. Collisions are situations from HALF dulpex (good old ethernet on coax).

If You set the port on the HP procurve to HALF duplex and you have NO collisions it seems top work on FULL duplex.

Also: Do not relay on counters only. Use FTP to send and receive a large file (10 Mb or +) and see if there is a performance problem.

Also check if you have the latest IOS (HP and Cisco).