From: Gary Duncanson (gary.duncanson@googlemail.com)
Date: Wed Jul 11 2007 - 13:36:20 ART
Yes Ivan,
Also default-information originate isn't available for eigrp. In cases where
is i.e OSPF, I understand the 'always' parameter has a bearing on if the
default is advertised based on if a default route is present on the router
or not.
I understand default-information originate etc to be concerned with
advertising a default route, whereas default information in seems to be
about allowing or denying default routes or external routes into an eigrp AS
router in a redistribution situation. The ACL on the end of the command
adding some granularity.
I understand it's a way of selecting (for example) the RIP routes leaned by
EIGRP when you redistribute. These being external.
With an ACL added to the end of the command determining the external (RIP)
route we don't want redistributing into that EIGRP AS on that router.
A filter in some sense.
----- Original Message -----
From: "Ivan" <ivan@iip.net>
To: <ccielab@groupstudy.com>; "Gary Duncanson"
<gary.duncanson@googlemail.com>
Cc: "Ben" <bmunyao@gmail.com>; <dayo@ademuyiwa.com>; <mmma@gawab.com>
Sent: Wednesday, July 11, 2007 4:25 PM
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
>> >>
>> >> _______________________________________________________________________
>> >>
>> >> >> > Subscription information may be found at:
>> >> >> > http://www.groupstudy.com/list/CCIELab.html
>> >> >
>> >> >_______________________________________________________________________
>> >> >Subscription information may be found at:
>> >> >http://www.groupstudy.com/list/CCIELab.html
>> >>
>> >> ---------------------------------------------
>> >> Free POP3 Email from www.Gawab.com
>> >> Sign up NOW and get your account @gawab.com!!
>> >
>> > _______________________________________________________________________
>> > Subscription information may be found at:
>> > http://www.groupstudy.com/list/CCIELab.html
>>
>> _______________________________________________________________________
>> Subscription information may be found at:
>> http://www.groupstudy.com/list/CCIELab.html
This archive was generated by hypermail 2.1.4 : Sat Aug 18 2007 - 08:17:40 ART