From: Brian Dennis (bdennis@internetworkexpert.com)
Date: Sun Mar 11 2007 - 15:47:05 ART
The question might also be referring to a route that originated in another
routing protocol and needs to be summarized prior to being redistributed
into RIP. See below:
R1 --- R2 --- R3 --- <REST OF THE NETWORK>
In this hypothetical case R1 and R2 are running RIP. R2 and R3 are running
OSPF. OSPF and RIP are being redistributed between each other. The task
asks for a particular subnet that originated from behind R3 to be to
summarized in R1's routing table (learned via RIP). Now they state that the
"ip summary-address rip" command can not be used on R2. So this leaves us
with one less option. Here are the common remaining options.
1) Use auto-summary
2) Use RIP version 1
3) Summarize the route prior to being redistributed into RIP (i.e. OSPF)
The confusing part of a task like this is that some people will
automatically "assume" that the route should ONLY be summarized in R1s
routing table but the task didn't say anything about where the summarization
had to occur. It just said that R1 should see the summarized route and you
can't use the "ip summary-address rip" command on R2. The point is to never
ASSUME anything! Ask the proctor if you are unsure about a particular
solution.
--Brian Dennis, CCIE4 #2210 (R&S/ISP-Dial/Security/SP) bdennis@internetworkexpert.com Internetwork Expert, Inc. http://www.InternetworkExpert.com Toll Free: 877-224-8987 Direct: 775-745-6404 (Outside the US and Canada)
On 3/10/07 11:11 PM, "huangyinxiao@gmail.com" <huangyinxiao@gmail.com> wrote:
> Hi everyone, > > Without using command "ip summary-address rip x.x.x.x", how can I give a > summary address from one rip router to another rip router? > > > Laurence > > _______________________________________________________________________ > Subscription information may be found at: > http://www.groupstudy.com/list/CCIELab.html
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