From: michael robertson (michael_w_2ca@xxxxxxxx)
Date: Sun Feb 03 2002 - 00:18:45 GMT-3
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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