From: Antonio Soares (amsoares@netcabo.pt)
Date: Wed Jul 11 2007 - 17:57:12 ART
Yes, i've confirmed that these commands only work for the *D or *D EX
candidates default routes generated by the "ip default-network x.x.x.x"
command.
Thanks.
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of Ivan
Sent: quarta-feira, 11 de Julho de 2007 16:25
To: ccielab@groupstudy.com; Gary Duncanson
Cc: Ben; dayo@ademuyiwa.com; mmma@gawab.com
Subject: Re: How is default-information command under router eigrp used?
"no default-information originate" doesn't affect on the 0.0.0.0 any way.
This
command used to permit or deny "default route" wich marked "*". Such route
can be created
ip default-network x.x.x.x
So try this on a lab:
R1:
R1(config)#int lo 0
R1(config-if)#ip address 1.1.1.1 255.255.255.0
R1(config)#ip default-network 192.192.192.0
R1(config)#ip route 192.192.192.0 255.255.255.0 1.1.1.100
R1#sh ip route | i Gate|S\*
Gateway of last resort is 1.1.1.100 to network 192.192.192.0
S* 192.192.192.0/24 [1/0] via 1.1.1.100
R1 --- (eigrp) --- R2
R1 redistribute static
R2:
R2#sh ip route | i Gate|\*
ia - IS-IS inter area, * - candidate default, U - per-user static
route
Gateway of last resort is 192.168.12.1 to network 192.192.192.0
D*EX 192.192.192.0/24 [170/156160] via 192.168.12.1, 00:02:34,
FastEthernet0/0
^^^
"*" means - use this route as default.
R2#conf t
R2(config)#router eigrp 100
R2(config-router)#no default-information in
R2#clear ip eigrp neighbors
*Jul 11 19:23:45.427: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor
192.168.12.1 (FastEthernet0/0) is down: manually cleared
*Jul 11 19:23:45.823: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor
192.168.12.1 (FastEthernet0/0) is up: new adjacency
R2#sh ip route | i Gate|\*
ia - IS-IS inter area, * - candidate default, U - per-user static
route
Gateway of last resort is not set
^^^
Here we see that default route is disappear.
On Wednesday 11 July 2007 14:41, Gary Duncanson wrote:
> Ben,
>
> I haven't played with this myself.
>
> Perhaps it's used when you want to control the default you will learn from
> a peer in the same AS. From the terminology in the command reference it
> seems to allude to uses when you have two diifferent EIGRP AS's and want
> some measure of control.
>
> default-information
> To control the candidate default routing information between IGRP or EIGRP
> processes, use the default-information command in router configuration
> mode. To suppress IGRP or EIGRP candidate information in incoming or
> outbound updates, use the no default-information in command.
>
> default-information {in | out} {access-list-number | name}
>
> no default-information {in | out}
>
> ----- Original Message -----
> From: "Ben" <bmunyao@gmail.com>
> To: "Mohamed M Moustafa" <mmma@gawab.com>
> Cc: <dayo@ademuyiwa.com>; "Cisco certification" <ccielab@groupstudy.com>
> Sent: Wednesday, July 11, 2007 11:16 AM
> Subject: Re: How is default-information command under router eigrp used?
>
> > Thank you Mohamed.
> >
> > You are quite right that eigrp does not use "default-information
> > originate"
> > command. Instead you redistribute a static default, or use the interface
> > "ip
> > summary-add eigrp 100 0.0.0.0 0.0.0.0" command.
> >
> > The command I'm struggling with is "default-information in|out acl".
> >
> > Here is a scenario:
> >
> >
> > 10.1.1.1 10.1.2.1 10.1.2.2
> >
----eigrp--------(f0/0)R1(s0/0)-----------eigrp----------------(s0/0)R2--
> >--------rip----------
> >
> > 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 100
> > net 10.1.2.1 0.0.0.0
> > net 10.1.1.1 0.0.0.0
> >
> > R2
> > int s0/0
> > ip add 10.1.2.2 255.255.255.0
> > router eigrp 100
> > net 10.1.2.2 0.0.0.0
> >
> > In the above scenario R2 will accept the default route from R1. What
> > circumstance would require us to use the "default-information in acl"
> > command then?
> >
> > Ben
> >
> > On 7/11/07, Mohamed M Moustafa <mmma@gawab.com> wrote:
> >> Hi,
> >>
> >> EIGRP don't utilize the default-information originate command, to
> >> advertise
> >> default information --> add the default route statically and the do
> >> redistribution.
> >>
> >> Normally, exterior/default routes are always accepted and default
> >> information is passed between EIGRP processes when redistribution
> >> occurs. when doing so, we still need to confirm the following command
to
> >> either allow the sending or receiving of a default route (allowed by
> >> default):
> >>
> >> Router(config-router)#default-information ?
> >> allowed Allow default information
> >> in Accept default routing information
> >> out Output default routing information
> >>
> >>
> >> HTH,
> >> Mohammed Mahmoud.
> >>
> >> Ben <bmunyao@gmail.com> wrote on 11 Jul 2007, 12:27 PM:
> >> 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
> >>
> >> _______________________________________________________________________
> >>
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