From: michael robertson (michael_w_2ca@xxxxxxxx)
Date: Sun Feb 03 2002 - 03:01:56 GMT-3
Hi, Rodney,
I have read the link before. THank you for your link
anyway. But the problem for me is the question I
asked. I don't find the information for the question I
asked.
As the paper says that EIGRP and IGRP does't
understand 0.0.0.o, But If I use redistribute 0.0.0.0,
EIGRP process will consider 0.0.0.0 as an external
route ( in this case, will this be considered default
route). and also the white paper doesn't answer
exactly the other two questions.
Thank you for your help.
michael
--- Rodney Thomson <rodneyt101@hotmail.com> wrote:
> Hi Michael,
>
> Here is a very good whitepaper on what you are
> looking at, if you haven't
> seen it already.
>
> http://www.cisco.com/warp/public/105/default.html
>
> I hope this helps.
>
> Regards
>
> Rodney
>
> >Hi, Group,
> >
> >I have a question about default network about
> eigrp.
> >
> >Question 1:
> >
> >As Eigrp doesn't understand 0.0.0.0 default
> network,
> >so you have to explicitly specify a default
> network
> >with command ip default-network, In my case, The
> >topolody is as follows:
>
> R1-----R2-----R3---
>
>
> routing protocol is eigrp
> If I configure a loopback address in R3 with address
> 172.16.1.1 and say ip default-network 172.16.0.0 (
> should be classful for default network). When no
> auto-summary is on, I can't see default network in
> R2,
> what I see is a network 172.16.1.0 as follows:
>
> ---------------------------------
> 172.16.0.0/24 is subnetted, 1 subnets
> D 172.16.1.0 [90/1764352] via 192.168.1.246,
> 00:15:00, Serial0/1
>
> ----------------------------------
>
>
> My question here is that do you have to enable
> auto-summary in order to propogate a default network
> because it's classful.
>
> I can see in R3 it's marked as default gateway as
> follows:
>
> ----------------------------------
> * 172.16.0.0/24 is subnetted, 1 subnets
> C 172.16.1.0 is directly connected,
> FastEthernet1/1
>
> ----------------------------------
>
> Question 2:
> IF i don't use ip default network, I use 0.0.0.0
> instead in R3 and then redistribute this static
> route
> to EiGRP network, I have seen also in R2, 0.0.0.0 is
> marked as a default network, Can i do this way as a
> default network? I am not sure it's a standard way
> or
> not. But EIGRP doesn't understand 0.0.0.0, I
> redistribute here, I think it's OK, any comment?
>
> Question 3:
>
> If my routing protocol is RIP in the above scenario,
> I
> found that RIP doesn't understand 0.0.0.0 also, You
> have to redistribute. Is this againt Jeff's book
> page
> 751 's static default route case study.
>
> I have seen somewhere that you need to explicitly to
> redistribute 0.0.0.0 since a IOS version which I
> forget.
> Is it so??
>
>
> Any help will be appreciate as always
>
>
> Regards
>
> michael
>
>
>
>
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