29 Mar
2001
29 Mar
'01
10:37 p.m.
Pete Turnbull skrev:
On Mar 29, 15:40, Iggy Drougge wrote:
> Pete Turnbull skrev:
> >On Mar 29, 6:39, Iggy Drougge wrote:
> >Well, they would really all be the same
network -- they'd be all one
> >collision domain (any packet or collision appearing on one port would be
> >seen on all the others. That's what a repeater does).
>
> True, but at least they will look like that and there won't be a dozen
> unused ports.
Yes, I see what you mean. You won't get any more
bandwidth on any part of
the net, nor on the whole net, but you will have the advantage that it's
easier to isolate a fault if one occurs. And of course, extra
blinkenlights, which is always A Good Thing :-)
I love walking into the darkened room only to be greeted by a row of sixteen
red LEDs. It's a hub to scare other hubs.
> >> What management would be involved with a
repeater?
>
> >Partitioning segments [...] Monitoring traffic levels [or] types
> >[...] Keeping a list of MAC addresses [...] setting [IP address]
> > or telling [the repeater] to use bootp/dhcp) or upgrade
> >the firmware, or set passwords.
>
> That monitoring seems interesting.
If you think so, find out about SNMP (Simple Network
Management Protocol)
and possibly RMON.
Sadly, no-one seems to have bothered porting an SNMP package for the Amiga. =/
If you have Windows, look for the SNMP service which is
buried in one of
the subdirectories on your CD; it includes "snmputil" which you can use to
retrieve or set information (but beware if you install it on an
Internet-accessible machine as it makes a lot of things available to remote
enquirers and has a lot of security problems).
I haven't got Windows. =)
If you have Linux, look on the net for UCD SNMP (which
has some command
line utilities) and SNMPY or SCOTTY. There's also gxsnmp but it's only in
an early stage of development.
I found UCD SNMP in the NetBSD package collection, so I suppose I'll employ
that.
For a bit of fun, take a look at Netcool (expensive!)
or MRTG (free!).
There's lots more, but that'll give you some idea.
http://rak.isternet.sk/linux-netman/snmp.html is a
reasonable place to
start.
Thank you.
> >> IOW it's just a glorified OFF switch.
=)
>
> >Partitioning, is, yes. Segmenting isn't, it's just a way of making one
> >big(ish) hub do the job of a few smaller ones.
>
> I was rather hoping it had that ability.
Segementing? Not many repeaters do, especially old
ones, as it needs a
fair amount of extra electronics. Basically it's done by a crossbar
switch, which is inside one large ASIC in modern repeaters that provide it.
The most common form of segmenting in hubs is in
dual-speed (10/100baseT)
hubs; what they really do is segment the ports into a 10baseT segment and a
100baseT segement, with a little store-and-forward switch in between.
We haven't got any 100Mb equipment, but since there's a half-dozen of game PCs
leaking junk onto the net, I thought it might be nice with some peace and
quiet on our end.
--
En ligne avec Thor 2.6a.
Also,what would a game about pimps be without Pimp Gear(tm)? As you move up in
the world,you'll be able to buy new clothes,upgrade your car,and upgrade your
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swayed more easily when you've got some cash to throw around.
Pimpin' ain't easy, upcoming game from Delsyd Software