This is wrong amigo.
The 'ip classless' command is used when configuring default routes. It is
used because when you create a default route on a router it gets advertised
as 0.0.0.0 in addition to the default network. When a router recieves the
advertised default route it will forward packets to a destination which does
not appear in its routing table. Specifically you need to use the 'ip
classless' command when using IGRP and EIGRP because they only advertise the
network you configured on them. If you do not use this command to enable
the default path to be used for non-connected subnets of the same major
classful network, the packets will be dropped at the router.
----- Original Message -----
From: Casey Fahey <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>
Sent: Tuesday, August 22, 2000 8:48 PM
Subject: Re: ip classless ?
> Ah yes, classful addressing. Blast from the past...
>
> I am assuming you are aware of the classes of IP addresses, and how a
> class A address has a first octet of 1-127, etc..
>
> Well, what IP Classless means is that the router *does not* assume that an
> IP address with a first octet of 1-126 is a /8 address, 128-191 a /16
> address, 192-223 a /24 address and so forth.
>
> Sound a bit archaic? Hmm... So are IGRP and RIP. ; )
>
> Your question is kind of tough to answer directly, since you do not need
to
> use IP Classless unless you need to break, say a 10.x.x.x network into /24
> subnets. If you don't include IP Classless, the router will assume the
mask
> is instead /8 and things will get weird...
>
> HTH,
>
> Casey
>
> >From: "Yee, Jason" <[EMAIL PROTECTED]>
> >Reply-To: "Yee, Jason" <[EMAIL PROTECTED]>
> >To: "'[EMAIL PROTECTED]'" <[EMAIL PROTECTED]>
> >Subject: ip classless ?
> >Date: Tue, 22 Aug 2000 22:07:51 -0500
> >
> >hi ,
> >
> >Anyone knows why when we use RIP or IGRP routing protocols and we have a
> >default network command entered , we need to include ip classless?
> >
> >Any form of input will be greatly appreciated
> >
> >
> >thanks
> >
> >
> >Jason
> >
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