From: SFeldberg@xxxxxxxxxxxxx
Date: Thu Nov 15 2001 - 11:21:53 GMT-3
I think the key to his problem lies in here:
"I've put ip default-network 170.10.0.0 on R4 All it did - it created
static route in running-config: ip route 170.10.0.0 255.255.0.0 170.10.10.0
It did not put any gateways of last resort on R4 or R1.
170.10.0.0 is classful- 170.10.10.0 is not- it appears that there is a /24
bit mask in use here. If the IGRP route was indeed classful
(170.10.0.0/16), there would have been no static route created, a
170.10.10.x address would have become the gateway of last resort and
170.10.0.0 would have become the candidate default route in the routing
table.
Steve
"Chua, Parry"
<Parry.Chua@co To: "Ryaboy Vadim" <VRyaboy@acuson
.com>
mpaq.com> cc: <ccielab@groupstudy.com>
Sent by: Subject: RE: default-network and i
grp (classic
nobody@groupst flsm/vlsm)
udy.com
11/15/2001
04:04 AM
Please respond
to "Chua,
Parry"
HI,
My understanding on the requirement on inject of default network into
IGRP are :
1. It has to be a classful n/w.
2. The n/w must know to IGRP.
Based on your topology, the configuration using one classful n/w, how
can we inject the same n/w as
the default n/w to IGRP ? May be someone can explain this better...
I have try out the ospf area range on 12.1 and it work for both area 0
and other. I.e. you will see the summary
of area 0 from other area and vice versa.
In your configuration, one problem is at the IGRP border router as well
as a OSPF other area router and has different subnet mask to the IGRP
n/w. One way to address this problem is to create a lo interface that
use
one of the available /26 subnet but share the same /24 subnet.
Redistribute and summary it to a single /24
and it will be avilable at IGRP n/w. But we all know that summaration
wlll create hole if not all address are used.
Parry Chua
-----Original Message-----
From: Ryaboy Vadim [mailto:VRyaboy@acuson.com]
Sent: Thursday, November 15, 2001 1:42 PM
To: Chua, Parry
Cc: 'ccielab@groupstudy.com'
Subject: RE: default-network and igrp (classic flsm/vlsm)
I thought if I use summarization - I don't need default network.
With summarization - there is a problem. OSPF don't summarize from area
0 to non-zero area.
I just wonder if I can solve it using default network not summarization
(on the side note my understanding is that summarization will not work
here as I explained - I tried it - did not work and I saw messages on
groupstudy confirming it).
So, question remains - can I use default network and if yes, how?
-----Original Message-----
From: Chua, Parry [SMTP:Parry.Chua@compaq.com]
Sent: Wednesday, November 14, 2001 9:39 PM
To: Ryaboy Vadim; ccielab@groupstudy.com
Subject: RE: default-network and igrp (classic flsm/vlsm)
The Cisco CCO has a description on default n/w :
http://www.cisco.com/warp/customer/105/default.html
Since you are using a class B 170.10.0.0 for your topology, you
can
redistribute the
ospf into IGRP. It all depends on how you configurae the OSPF, sinec
R2/R5 at area 0,
if R4/R5 at other area (eg 45), you can use area range to summaries /28
and /26 to two /24 and then redistribute into IGRP at R4.
Parry Chua
-----Original Message-----
From: Ryaboy Vadim [ mailto:VRyaboy@acuson.com]
Sent: Thursday, November 15, 2001 12:18 PM
To: 'ccielab@groupstudy.com'
Subject: default-network and igrp (classic flsm/vlsm)
Hello,
Here is the scenario:
R2 --- R5(E0) ---(E0) R4 (S0) --- (S1)R1
R4,R1 running igrp
R4- R5 - OSPF virtual link
R5-R2 - OSPF area 0
IGRP and OSPF mutually redistributed on R4. R1 (/24) don't see
R4 S1 170.10.15.1/24
R4 S0 170.10.15.1/24
R4 (e0) 170.10.11.65 / 26
R5 (e0) 170.10.11.66 / 26
R2 -- R5 Frame Relay network 170.10.10.32/28.
Classic FLSM/VLSM scenario. R1 (/24) don't see R2-R5 network .
One of few solutions (right?)- use ip classless (I have it on)
And use ip default-network.
I've put ip default-network 170.10.0.0 on R4
All it did - it created static route in running-config: ip route
170.10.0.0
255.255.0.0 170.10.10.0
It did not put any gateways of last resort on R4 or R1.
Can I use ip default-network to solve this problem?
And how.
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