I have a p550 with the two onboard 10/100/1000 NICs and a third
10/100/1000 NIC. It looks like the only way to get 1000 (Gigabit) is
to set the NIC devices to Auto_Negotiation. I'm not a big fan of auto
negotiate. I'm also useing Etherchannel for these NICs. 0 and 1 are
regular, 2 is failover. I'm curious to hear people experiences with
using auto negotiate for Gigabit, and whith Etherchannel. The
Etherchannel documentation says to set the speed of the NICs...

Thoughts...

T.

"1000 MBps half and full duplex are not valid values. As per the IEEE
802.3z specification, gigabit speeds of any duplexity must be auto-
negotiated for copper (TX) based adapters. Please select auto-
negotiation if these speeds are desired."

(http://publib16.boulder.ibm.com/doc_...aixprggd/kerne
xtc/ethernet_dd.htm)

Bye
Holger

"Holger Emme" <spam_is_useless@bounce.net> wrote in message
news:MPG.1cd22b92d6d45844989691@news.arcor.de...
> "1000 MBps half and full duplex are not valid values. As per the IEEE
> 802.3z specification, gigabit speeds of any duplexity must be auto-
> negotiated for copper (TX) based adapters. Please select auto-
> negotiation if these speeds are desired."
>
> (http://publib16.boulder.ibm.com/doc_...aixprggd/kerne
> xtc/ethernet_dd.htm)
>
> Bye
> Holger

There are a lot of switches and routers that just don't like anything but
autonegotiate. Now whether you believe your network designers is another
matter, but anything but autonegotiate makes our network designers blow
their stacks. There are political reasons to use autonegotiate.

TB wrote:
> I have a p550 with the two onboard 10/100/1000 NICs and a third
> 10/100/1000 NIC. It looks like the only way to get 1000 (Gigabit) is
> to set the NIC devices to Auto_Negotiation. I'm not a big fan of auto
> negotiate. I'm also useing Etherchannel for these NICs. 0 and 1 are
> regular, 2 is failover. I'm curious to hear people experiences with
> using auto negotiate for Gigabit, and whith Etherchannel. The
> Etherchannel documentation says to set the speed of the NICs...
>
> Thoughts...
>
> T.
>

In the past we had problems on our old J50's with the 'Auto Negotiation'
setting. This seems to be resolved with latest NIC's.

On our p690's and p650' we are using 'Auto Negotiation' with no
problems. For the p690 lpars the media speed is negotiated to 1000 Mbps
Full Duplex ('entstat -d ent1'). For the p650, the media speed is
negotiated to 100 Mbps Full Duplex. The p690 lpars are connected to a
newer switch hence the higher connection speed.