Re: replacing network card

From: Bill Vermillion (bv_at_wjv.comREMOVE)
Date: 03/30/04 

Date: Tue, 30 Mar 2004 14:35:01 GMT

In article <1080637949.781675@ente.ipberlin.com>,
jpd <read_the_sig@do.not.spam.it> wrote:
>In article <HvCCqE.15qA@wjv.com>, Bill Vermillion wrote:
>[snip!]
>>
>> You did not say what is between these NIC cards and often the
>> problem will like with negotiation at the switch.

>ObNitPick: What's next, Network NIC Cards?

Some switches handle N-Way negotiation properly, and it sounds that
perhaps the one he is using does not. That's why I asked
what was between the NIC cards. I made an assumption that he
was not connecting directly via a cross-over, as most people
mention when they do that.

I'm in the process of upgrading out a Cisco into a Foundry switch
for better management control because of seeing the same things.

Running in mixed OS environments, some with proprietary hardware,
yields all sort of 'interesting' problems when one vendors
'enahnacments' don't match the industry specificiatons.

There was a recent problem just like the above in the
freebsd-net mailing list. If something is forced at 100FDX a
device that auto-negotiats will be set to 100HDX and the problems
the OP specified sound just like that. If you don't think that is
the proper method, have them rewrite the 802.3u specs.

Another I've seen is when when there is more than one /24 network
and some OSes require that the gateway be within the netmask
range they are on, while MS products wile use any gateway within
the /24 range even if they are subnetted to a fraction of that.

In that instance - trying to find the slowness - it turns out
the OS/X was going through a switch, a bandwidth limiter, to the
edge router, and back to the same to get to a machine on the same
switch that should have been direct.

So that's why I asked what was >between< the NICs.

Bill 

-- 
Bill Vermillion - bv @ wjv . com

Relevant Pages

  • Re: replacing network card
    ... In article, Bill Vermillion wrote: ... > problem will like with negotiation at the switch. ... What's next, Network NIC Cards? ...
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    (freebsd-current)