From: Kenneth Wygand (KWygand@customonline.com)
Date: Wed Oct 01 2003 - 15:12:59 GMT-3
You can advertise the network as a default route if you enter the "ip
default-network x.x.x.x" command twice - once for the network with the
"unnatural" mask and then once again for the natural mask. For example,
if I have an ethernet address of:
10.1.2.3/24
I can make this my default network by entering:
IP default-network 10.1.2.0
This will put a route in your routing table for the classful address of
10.0.0.0 to the next hop of 10.1.2.3.
Then add a default route to the classful address:
IP default-network 10.0.0.0
Now you will have a default route to 10.1.2.3 even though it's not
classful on the interface.
Hope this helps,
Kenneth E. Wygand
Systems Engineer, Project Services
CISSP #37102, CCNP, CCDP, MCP 2000, CNA 5.1, Network+, A+
Custom Computer Specialists, Inc.
"It's not just about ending up where you want to be, it's about making
the most of the trip there."
-Anonymous
-----Original Message-----
From: A Paradela [mailto:aparadela@earthlink.net]
Sent: Wednesday, October 01, 2003 1:29 PM
To: 'A Paradela'; 'Marco Umer'; 'Lab'
Subject: RE: Eigrp - default-information
Just found (once again) that networks used for default routes in EIGRP
must
be classfull (natural mask), just like RIP.
R3
int lo1
ip addr 131.131.1.1 255.255.0.0
router eigrp 1
network 131.131.0.0
ip default-network 131.131.0.0
R6
show ip route eigrp
* - candidate default
D* 131.131.0.0/16 [90/304128] via 133.5.50.7, 00:00:17, TokenRing0
Changing the mask to anything else makes it fail (does not show up on
the
other routers as a default route...) Also tried other classes, same
thing.
AP
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of A
Paradela
Sent: Wednesday, October 01, 2003 11:33 AM
To: 'Marco Umer'; 'Lab'
Subject: RE: Eigrp - default-information
I'm also having trouble with eigrp's DIO mechanism. Here's the config:
R3
ip route 0.0.0.0 0.0.0.0 nul0
router eigrp 5
no auto
network 1.1.1.0 0.0.0.255
R6
router eigrp
no auto
network 1.1.1.0 0.0.0.255
No default route shows up on R6 unless I add "network 0.0.0.0" on R3,
which
then brings in every other interface into EIGRP (no good) I've also
tried
"network 0.0.0.0 0.0.0.0" but same thing.
Per
http://www.cisco.com/univercd/cc/td/doc/product/software/ios123/123cgcr/
iprr
p_r/ip2_c1g.htm#1038093 and the fact that the "default-information
in/out"
cmd does not show up on the configs, I would think it should work, but
does
not. Also tried using "ip default-network" on R6
Any ideas? Thanks, AP
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Marco Umer
Sent: Tuesday, September 30, 2003 6:04 PM
To: Lab
Subject: Eigrp - default-information
Hi all,
There is something the I really don't understand about Eigrp and
default-information command, I am trying to block the default with this
command (I have tried other cases but ... failed)
Quite easy configuration:
router eigrp 2
network 172.16.100.0 0.0.0.255
network 192.168.1.0
default-information in 1
no auto-summary
access-list 1 deny 0.0.0.0 log
If I look at the show ip protocol it seems ok
sh ip protocols
Routing Protocol is "eigrp 2"
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Default networks flagged in outgoing updates
Default networks accepted from incoming updates, if matching access
list 1
Also the show access-list shows matches
#sh access-lists
Standard IP access list 1
deny 0.0.0.0 log (8 matches)
But if I look at the routing table I find the default and the other
external
#sh ip route eigrp
172.16.0.0/16 is variably subnetted, 5 subnets, 5 masks
D EX 172.16.2.0/24 [170/21441536] via 172.16.100.2, 00:10:55,
Serial1/0:1
D 192.168.2.0/24 [90/20640000] via 172.16.100.2, 00:58:24,
Serial1/0:1
D EX 192.168.33.0/24 [170/21441536] via 172.16.100.2, 00:10:55,
Serial1/0:1
D*EX 0.0.0.0/0 [170/21441536] via 172.16.100.2, 00:09:10, Serial1/0:1
Do you have any idea what it wrong, I searched a lot for
default-information
but it is a quite hard search because it is spitted in default and
information ... it matches everything.
Thank you in advance
Marci Umer
***Get your CCIE and a FREE vacation: Shop.GroupStudy.com***
This archive was generated by hypermail 2.1.4 : Mon Nov 24 2003 - 07:52:54 GMT-3