Puffers Buddy,
Actually you are correct about configuring a default route, BUT you won't
be able to use that default static route if you don't enable your router
with IP classless (enabled by default in 11.2 and up). IP classless allows
a router to use the best "supernetted" route.
Whatshakin wrote:
Specifically you need to use the 'ip
> classless' command when using IGRP and EIGRP because they only advertise
the
* network you configured on them.
The above statement is not true. The network statement under the routing
process (whether IGRP or EIGRP) only identifies the interfaces that will
participate in routing updates. It does not only route those networks. You
can redistribute static route's (i.e default 0.0.0.0 routes) into your
routing protocols and that route will get propagated out to other routers
running that routing protocol and AS over the interfaces configured with and
IP address in the network statement under the routing process.
David
-----Original Message-----
From: Adam Hickey [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, August 23, 2000 4:26 PM
To: [EMAIL PROTECTED]
Subject: Re: ip classless ?
Hmmm, let's see where to start....
1: EIGRP uses classless routing by default unlike IGRP.
2: Default routes refer to static routes--not dynamic routes used in RIP,
EIGRP, IGRP, etc.
3: The command "ip route 0.0.0.0 0.0.0.0 w.x.y.z" enables a default
route--not "ip classless"
By the way, this is thepuffer's friend ( not the puffer ) responding to
this. I just couldn't resist. Also, I hope I didn't make any major mistakes
in my claims. If so I will be really bummed.
----- Original Message -----
From: "whatshakin" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Wednesday, August 23, 2000 12:27 AM
Subject: Re: ip classless ?
> 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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> ___________________________________
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