Ok, try this
Ip- classless: allows a router to look for routes classlessly
(understands subnets) meaning it will do a longest bit match with routes
in your routing table but if after checking for subnets it doesn't find
one locally then it follows the default route.
With out this co
ip classless is used to tell the routing protocols which supports VLSM that
subnet should be sdvertised as part of the route. ip classfull on the other
hand
is used to restrict to use major class subnet mask.
Nadeem
==
Arnaldo Gomez wrote:
> Can someone give a gerneral explanation on these
subnet zero lets you do this:
ip address 192.168.1.1 255.255.255.252
ip classless lets you do this
ip address 192.168.1.1 255.255.0.0 and probably more importantly it
will allow a router to forward a packet via a default route even though
router is connected to a subnet of the major netwo
Well,
From
http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/12cgcr/np1_r
/1rprt2/1ripadr.htm#xtocid12 :
ip classless
At times the router might receive packets destined for a subnet of a network
that has no network default route. To have the Cisco IOS software forward
such packets
This is definitely a topic where you should search the archives. There
have been some excellent discussions in the past that have resulted in
some great explanations of each of these commands. It would be better
for you to read them than to have the original posters type them in all
over again.
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