From: Salah ElShekeil (salah.elshekeil@gmail.com)
Date: Wed Mar 25 2009 - 08:56:57 ART
route to NULL its a mechanism in the router itself to prevent it from
forwarding traffic that it doesn't have longer match for it,
Again from the beginning summarization in eigrp is in the interface level,
you can do it anywhere in the eigrp domain
when the summary is configured in eigrp all subnets that make this summary
are suppressed, like when you put the summary key word in bgp,
In some cases the route to null in eigrp makes a problem in your network
like the previous example,
in rip its different coz the rip will not install a route to null in the
routing table when you install the summary,
Try to lab it up it may help you,
sorry it may be not clear coz I typed it quickly
if you still need help don't hesitate do ping :)
HTH
Salah
On Wed, Mar 25, 2009 at 2:12 PM, marish shah <contactmarish@gmail.com>wrote:
> Dear Salah,
> Thanks for ur great help .OK now null route concept is
> clear for me .But I have some more Q .N I'm sure it will not bother you.
> Null0 we use for prevent routing loops.But in rip its doesn't generate null
> route so there we need to create manually or what ?
> And as you mention that in some cases we do not need null0 can u pl z
> explain me in which scenario we don't need null0.
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