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RIP + Default Route

 
 
Joey Kinney
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      10-21-2005
It's been a while since I've done any router config's so if my question is
stupid, I apologize, but I do need some advice. I am configuring a Cat 3550
for L3 routing. I have created my VLAN's and want to use RIP since the
other L3 switch I'm connecting to will only do RIP or OSPF. I have 3 Cat
3550's and 1 ProCurve 3400 that will be managing my WAN. I have a 2651XM
that connects my HP 3400 from the WAN to my single gateway to the web. I
know RIP v2 won't propogate default routes (ie; 0.0.0.0 0.0.0.0 10.40.10.2)
so how can i configure my routers to recognize the single exit point from my
WAN to the web?? Thanks in advance!!

joey



 
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Joe Beasley
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      10-21-2005
use OSPF to propagate the default route.


SDF Public Access UNIX System - http://sdf.lonestar.org
 
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Marco Matarazzo
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      10-21-2005
"Joey Kinney" <> wrote in comp.dcom.sys.cisco:

> WAN to my single gateway to the web. I know RIP v2 won't propogate
> default routes (ie; 0.0.0.0 0.0.0.0 10.40.10.2) so how can i configure
> my routers to recognize the single exit point from my WAN to the web??


Originating and propagating a default route works well here:

router rip
version 2
timers basic 3 10 0 10
passive-interface default
network x.0.0.0
neighbor x.y.w.z
neighbor z.y.v.w
default-information originate
no auto-summary

the key here is the "default-information originate".

--
Ciao!
]\/[arco
 
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Merv
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      10-21-2005


There are a number of ways to have RIP advertise a default route.

see
http://www.cisco.com/en/US/tech/tk36...80094374.shtml


RIP advertises a route to 0.0.0.0 if a gateway of last resort is
selected using the ip default-network command. This network specified
in the ip default-network command need not be explicitly advertised
under RIP

In earlier versions of RIP, the default route created using the ip
route 0.0.0.0 0.0.0.0 was automatically advertised by RIP routers. In
Cisco IOS Software Release 12.0T and later, RIP does not advertise the
default route if the route is not learned via RIP. It may be necessary
to redistribute the route into RIP.

================================================== ===========================================

router rip
redistribute static
network 192.168.1.0

ip route 0.0.0.0 0.0.0.0 Null0

*Mar 1 00:06:31.681: RIP: build update entries
*Mar 1 00:06:31.681: subnet 0.0.0.0 metric 1
*Mar 1 00:06:59.547: RIP: sending v1 update to 255.255.255.255 via
FastEthernet1/0 (192.168.1.1)

================================================== ===============================================

router rip
network 192.168.1.0

ip default-network 192.168.2.0


MERV1#debug ip rip
RIP protocol debugging is on
MERV1#
*Mar 1 00:15:45.717: RIP: sending v1 update to 255.255.255.255 via
FastEthernet
1/0 (192.168.1.1)
*Mar 1 00:15:45.717: RIP: build update entries
*Mar 1 00:15:45.717: subnet 0.0.0.0 metric 1

================================================== ==============================================

router rip
network 192.168.1.0
default-information originate


*Mar 1 00:18:06.220: RIP: sending v1 update to 255.255.255.255 via
FastEthernet
1/0 (192.168.1.1)
*Mar 1 00:18:06.220: RIP: build update entries
*Mar 1 00:18:06.220: subnet 0.0.0.0 metric 1

 
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