From: Ben (bmunyao@gmail.com)
Date: Wed Jul 11 2007 - 08:43:38 ART
Here is another variation of the scenario. R1 is redistributing RIP to
eigrp10, and therefore advertising at least one D EX to R2.
10.1.1.1 10.1.2.1 10.1.2.2
10.1.3.1
----------(f0/0)R1(s0/0)-----------eigrp10-------------(s0/0)R2(f0/0)---eigrp20--
R1
int f0/0
ip add 10.1.1.1 255.255.255.0
int s0/0
ip add 10.1.2.1 255.255.255.0 <http://0.0.0.0/>
router eigrp 10
net 10.1.2.1 0.0.0.0
redistr connected metric 1 1 1 1 1
<http://0.0.0.0/>
R2
int f0/0
ip add 10.1.3.1 255.255.255.0
int s0/0
ip add 10.1.2.2 255.255.255.0
router eigrp 10
net 10.1.2.2 0.0.0.0
redistr eigrp 20
router eigrp 20
net 10.1.3.1 0.0.0.0
redistr eigrp 10
no default-information in
I suppose this should block 10.1.1.0/24 from eigrp20
Ben
On 7/11/07, Salau, Yemi <yemi.salau@siemens.com> wrote:
>
> Remember default-information command is not only meant for dafault
> routes, and there is nothing like no default-originate under eigrp process,
> on Cisco Routers anyway as of 12.4; maybe you're trying to say, no
> default-information out, that way, R2 will not redistribute EIGRP 10's D EX
> and default routes to EIGRP 20 neighbors.
>
> To control which of the D EX and default routes not to redistribute to
> EIGRP 20, use ACL to match those. Like I said before, Cisco brought in the
> acl option since 11.2 (generally released for public viewing :-))
>
> Many Thanks
>
> Yemi Salau
>
>
> ------------------------------
> *From:* Ben [mailto:bmunyao@gmail.com]
> *Sent:* Wednesday, July 11, 2007 11:32 AM
> *To:* Salau, Yemi
> *Cc:* dayo@ademuyiwa.com; Cisco certification
> *Subject:* Re: How is default-information command under router eigrp used?
>
>
> Yemi,
> Thanks for responding. Here's an attempt at putting your explanation into
> a scenario
>
>
> 10.1.1.1 10.1.2.1 10.1.2.2
> 10.1.3.1
>
> ----eigrp10------(f0/0)R1(s0/0)-----------eigrp10-------------(s0/0)R2(f0/0)---eigrp20--
>
> R1
> int f0/0
> ip add 10.1.1.1 255.255.255.0
> int s0/0
> ip add 10.1.2.1 255.255.255.0
> ip summary-add eigrp 100 0.0.0.0 0.0.0.0
> router eigrp 10
> net 10.1.2.1 0.0.0.0
> net 10.1.1.1 0.0.0.0
>
> R2
> int f0/0
> ip add 10.1.3.1 255.255.255.0
> int s0/0
> ip add 10.1.2.2 255.255.255.0
> router eigrp 10
> net 10.1.2.2 0.0.0.0
> redistr eigrp 20
> router eigrp 20
> net 10.1.3.1 0.0.0.0
> redistr eigrp 10
> no default-originate out
>
> R2 is receiving a default from R1 on process eigrp10, and redistributing
> to process eigrp20. Would the use of this command as indicated then prevent
> R2 from sending the default into eigrp20? If yes, how do ACLs fit in?
>
> Ben
>
>
> On 7/11/07, Salau, Yemi <yemi.salau@siemens.com> wrote:
> > Normally and by default, exterior routes are always accepted and default
> > information is passed between EIGRP processes when redistribution
> > occurs. i.e you have the command turned on: "default-information in" but
> > hidden in the IOS I believe.
> >
> > Let's say redistributing RIP or another EIGRP Process A into another
> > EIGRP Process B, by default all the external routes and default
> > information goes into the EIGRP Process B, but you can use this command
> > {"no default-information in/out"} to suppress or not accept exterior or
> > default routing information in incoming or outbound updates. In other
> > words, you can stop your EIGRP Process from receiving or sending out
> > exterior updates and default routes.
> >
> > Hope this helps ... :-)
> >
> > Many Thanks
> >
> > Yemi Salau
> >
> > -----Original Message-----
> > From: nobody@groupstudy.com [mailto: nobody@groupstudy.com] On Behalf Of
> > Ben
> > Sent: Wednesday, July 11, 2007 10:28 AM
> > To: dayo@ademuyiwa.com; Cisco certification
> > Subject: Re: How is default-information command under router eigrp used?
>
> >
> > Dayo,
> >
> > Thanks for responding.
> >
> > In eigrp, the syntax for this command is:
> >
> > router eigrp 100
> > default-information {allowed[in|out]|in|out [acl]}
> >
> > I'm having trouble figuring out how to use it, and scenarios that apply.
> >
> > Ben
> >
> >
> >
> > On 7/11/07, dayo@ademuyiwa.com < dayo@ademuyiwa.com> wrote:
> > >
> > > Do you mean default information originate?
> > >
> > > On 7/11/07, Ben <bmunyao@gmail.com > wrote:
> > > > Hi
> > > >
> > > > I cann't seem to make sense of how to use the "default-information"
> > > command
> > > > under EIGRP. Does anyone here have examples of its usage that might
> > help
> > > me
> > > > digest this command.
> > > >
> > > > TIA
> > > >
> > > > Ben
> > > >
> > > >
> > _______________________________________________________________________
> > > > Subscription information may be found at:
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> >
> > _______________________________________________________________________
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