RE: Duplex problem on ethernet line

That can cause real performance problems - they may seem to work ok, but if
they are set to 100/half on both ends, or a step up to 100/full on both,
performance will be much better.
Setting the Switch (we use Cisco 3524pwr's) ports for clients at Auto and
the Adapter -<should> be the initial starting point. 
Our 400 and the switch port as well are playing nicely together like this.

AS400 Ethernet adapter:
Line description . . . . . . . . . :   CTCAS400      
Option . . . . . . . . . . . . . . :   *BASIC        
Category of line . . . . . . . . . :   *ELAN         
                                                     
Resource name  . . . . . . . . . . :   CMN05         
Online at IPL  . . . . . . . . . . :   *YES          
Vary on wait . . . . . . . . . . . :   *NOWAIT       
Network controller . . . . . . . . :   CTCASNET      
Local adapter address  . . . . . . :   000629ECB09B  
Exchange identifier  . . . . . . . :   05671400      
Ethernet standard  . . . . . . . . :   *ALL          
Enable for TCP/IP  . . . . . . . . :   *NO           
Line speed . . . . . . . . . . . . :   *AUTO         
Current line speed . . . . . . . . :   100M          
Duplex . . . . . . . . . . . . . . :   *AUTO         
Current duplex . . . . . . . . . . :   *FULL         
Maximum controllers  . . . . . . . :   40            
Switch port:
!
interface FastEthernet0/23
 switchport trunk encapsulation dot1q
 switchport trunk native vlan 10
 switchport mode trunk
 switchport voice vlan 60
 switchport priority extend cos 0
 spanning-tree portfast
!

-----Original Message-----
From: Bill Hogue [mailto:bhogue@xxxxxxxxx] 
Sent: Friday, August 20, 2004 12:10 PM
To: Midrange Systems Technical Discussion
Subject: RE: Duplex problem on ethernet line


I agree.  The problem is that when both sides were set to 100/full the
connection stopped working.  Once I changed the iSeries to auto, the
iSeries shows 100/HALF while the switchport is set to 100/FULL and its
working.

Bill Hogue
Network Manager
Brattleboro Memorial Hospital
17 Belmont Avenue
Brattleboro, VT 05301
Phone 802.257.8283
Fax 802.251.8461
 
-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Tom Jedrzejewicz
Sent: Friday, August 20, 2004 12:51 PM
To: Midrange Systems Technical Discussion
Subject: Re: Duplex problem on ethernet line

When both sides are Auto they have to "negotiate" settings, and that
does not always function properly.  My preference is to lock down the
settings at the switch port for servers and key equipment.  You an use
the negotiation process to get the best settings, then lock them in. 
One less thing to break!

On Fri, 20 Aug 2004 12:41:08 -0400, Bill Hogue <bhogue@xxxxxxxxx> wrote:
> That's my next step. I can't make the change until Wednesday PM.  I
had
> a different problem last year (on a different switch) where IBM
insisted
> that both be hard coded.  Cisco says both should be auto.
> 
> Bill Hogue
> Network Manager
> Brattleboro Memorial Hospital
> 17 Belmont Avenue
> Brattleboro, VT 05301
> Phone 802.257.8283
> Fax 802.251.8461
> 
> 
> 
> 
> -----Original Message-----
> From: midrange-l-bounces@xxxxxxxxxxxx
> [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of guy.terry
> Sent: Friday, August 20, 2004 4:15 AM
> To: midrange-l@xxxxxxxxxxxx
> Subject: Re: Duplex problem on ethernet line
> 
> Does it work if you set both switch and iSeries to AUTO/AUTO?
> 
> Guy
> --

-- 
Tom Jedrzejewicz
tomjedrz@xxxxxxxxx
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