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Home > Archive > alt.certification.cisco > February 2004 > Default Routes and IP CLASSLESS
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Default Routes and IP CLASSLESS
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| DarksideMP 2004-02-25, 9:25 pm |
| Can anyone explain this concept to me more in detail and when you would use it?
Thanks
MP
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| Hansang Bae 2004-02-25, 11:25 pm |
| In article <20040225201815.16225.00000316@mb-m11.aol.com>,
darksidemp@aol.com says...
> Can anyone explain this concept to me more in detail and when you would use it?
Yes. It's been covered before. Checkout groups.google.com, advanced
search. Look in this group.
--
hsb
"Somehow I imagined this experience would be more rewarding" Calvin
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| Mike I 2004-02-25, 11:25 pm |
| When classless routing is in effect, if a router receives packets destined
for a subnet of a network that has no network default route, the router
forwards the packet to the best supernet route.
--minnoce944
"DarksideMP" <darksidemp@aol.com> wrote in message
news:20040225201815.16225.00000316@mb-m11.aol.com...
> Can anyone explain this concept to me more in detail and when you would
use it?
>
> Thanks
>
> MP
| |
| Bob by The Bay 2004-02-25, 11:25 pm |
| If the routing table doesn't contain a match to the destination address in a
packet or an appropriate summary address match, the packets with the
unmatched destinations will be dropped.
The purpose for the default route is to always provide an avenue of last
resort, to avoid the above dropped-packet scenario.
This is done with a command similar to:
ip route 0.0.0.0 0.0.0.0 192.168.1.1 220
where the 0.0.0.0 0.0.0.0 is the special pattern that designates 192.168.1.1
as a the default route.
My understanding is that since pattern matching for use of a default route
itself is classless, the command "ip classless" must also be present in
order for the default route to function properly.
I'm sure the above is over simplified, so I'm looking forward to seeing more
on this from other posters.
FWIW,
Robert
"DarksideMP" <darksidemp@aol.com> wrote in message
news:20040225201815.16225.00000316@mb-m11.aol.com...
> Can anyone explain this concept to me more in detail and when you would
use it?
>
> Thanks
>
> MP
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