"ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU> wrote on 11/30/2005
10:00:06 AM:
> Can anyone give the technical reason why auto detect on Server NICs
> cause such horrible performance for TSM server backups and restores.

<sound of hollow laughter>
This is a bone of network contention (no pun intended), particularly with
Cisco networks. It is *not* a TSM problem. (As usual, TSM is the World's
Best IT Infrastructure Problem Finder.)

There are any number of whitepapers, Cisco and otherwise, that insist that
all NICs in all networks have speed and duplex settings hardset to the
best speed suited to the network hardware. The problem with autonegotiate
is that, unless *every* network device in the chain is set to
autonegotiate, the entire chain runs at 10/half.

--
Mark Stapleton (mark.stapleton AT usbank DOT com)
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