From: Joseph Brunner (joe@affirmedsystems.com)
Date: Sun Nov 11 2007 - 04:45:17 ART
I didn't overlook anything ;)
My verification was to show the routes leaving the routing table one by one,
the first one leaving from R6' s connected 150.1.1.0/24 (f0/1) being
shutdown, the second from a s0/0 to r5 (where 150.1.3.0/24 is connected to
bb3.
Either route is enough to make the rip conditional default succeed,
Lack of BOTH routes in R6's routing table is enough to make rip stop default
originating to Sw1 via R6's f0/0
-Joe
_____
From: shiran guez [mailto:shiranp3@gmail.com]
Sent: Sunday, November 11, 2007 1:31 AM
To: Joseph Brunner
Cc: groupstudy
Subject: Re: RIP conditional route advertisement
your condition was only if one of the network is showing on the Routing
Table but you probebly overlooked that both networks are not in your routing
table from your verification
Verification
rack1r6(config)#int f0/1
rack1r6(config-if)#shut
rack1r6#sh ip route 150.1.1.0 <http://150.1.1.0/>
% Subnet not in table
rack1r6(config)#int s0/0
rack1r6(config-if)#shut
rack1r6(config-if)#^Z
rack1r6#sh ip route 150.1.3.0 <http://150.1.3.0/>
% Network not in table
can you show that the routes do apear on your routing table and you still do
not advertise the 0.0.0.0/0?
1) Make sure first the routes (150.1.3.0 <http://150.1.3.0/> or 150.1.1.0
<http://150.1.1.0/> ) are showing on your RIB
2) do clear ip route * on SW1 to reinitialize the build of the RIB
3) If you still do not see the default route on SW1 then do debug ip rip on
R6 to make sure it is sending i, after you verified step 1.
On Nov 11, 2007 6:38 AM, Joseph Brunner <joe@affirmedsystems.com> wrote:
From my own personal lab testing of the doc cd;
Task:
Router6 should advertise a rip default route ONLY to Switch1 and ONLY if
either 150.1.1.0/24 or 150.1.3.0/24 exist in the routing table.
rack1r6#sh run | b router rip
router rip
version 2
network 1.0.0.0 <http://1.0.0.0/>
network 150.1.0.0 <http://150.1.0.0/>
default-information originate route-map BBNETSCHECK
no auto-summary
route-map BBNETSCHECK permit 10
match ip address 10
set interface FastEthernet0/0
!
route-map BBNETSCHECK permit 20
match ip address 20
set interface FastEthernet0/0
access-list 10 permit 150.1.1.0 <http://150.1.1.0/> 0.0.0.255
<http://0.0.0.255/>
access-list 20 permit 150.1.3.0 <http://150.1.3.0/> 0.0.0.255
<http://0.0.0.255/>
Verification;
(see if the route is now on sw1)
rack1sw1#sh ip route 0.0.0.0 <http://0.0.0.0/>
Routing entry for 0.0.0.0/0, supernet
Known via "rip", distance 120, metric 1, candidate default path
Redistributing via ospf 1, rip
Last update from 1.1.16.6 <http://1.1.16.6/> on GigabitEthernet0/6,
00:00:02 ago
Routing Descriptor Blocks:
* 1.1.16.6 <http://1.1.16.6/> , from 1.1.16.6 <http://1.1.16.6/> , 00:00:02
ago, via GigabitEthernet0/6
Route metric is 1, traffic share count is 1
Verification
rack1r6(config)#int f0/1
rack1r6(config-if)#shut
rack1r6#sh ip route 150.1.1.0 <http://150.1.1.0/>
% Subnet not in table
(back on sw1, wait more than 30 seconds to be safe)
rack1sw1#sh ip route 0.0.0.0 <http://0.0.0.0/>
Routing entry for 0.0.0.0/0, supernet
Known via "rip", distance 120, metric 1, candidate default path
Redistributing via ospf 1, rip
Last update from 1.1.16.6 <http://1.1.16.6/> on GigabitEthernet0/6,
00:00:18 ago
Routing Descriptor Blocks:
* 1.1.16.6 <http://1.1.16.6/> , from 1.1.16.6 <http://1.1.16.6/> , 00:00:18
ago, via GigabitEthernet0/6
Route metric is 1, traffic share count is 1
(now shutdown the last interface towards BB3, 150.1.3.0/24 on router 6)
rack1r6(config)#int s0/0
rack1r6(config-if)#shut
rack1r6(config-if)#^Z
rack1r6#sh ip route 150.1.3.0 <http://150.1.3.0/>
% Network not in table
(Check on switch1; wait a while, past invalid then flush timer)
rack1sw1#sh ip route 0.0.0.0 <http://0.0.0.0/>
Routing entry for 0.0.0.0/0, supernet
Known via "rip", distance 120, metric 1, candidate default path
Redistributing via ospf 1, rip
Last update from 1.1.16.6 <http://1.1.16.6/> on GigabitEthernet0/6,
00:02:58 ago
Routing Descriptor Blocks:
* 1.1.16.6 <http://1.1.16.6/> , from 1.1.16.6 <http://1.1.16.6/> , 00:02:58
ago, via GigabitEthernet0/6
Route metric is 1, traffic share count is 1
rack1sw1#sh ip route 0.0.0.0 <http://0.0.0.0/>
Routing entry for 0.0.0.0/0 <http://0.0.0.0/0> , supernet
Known via "rip", distance 120, metric 4294967295 (inaccessible), candidate
default path
Redistributing via ospf 1, rip
Last update from 1.1.16.6 <http://1.1.16.6/> on GigabitEthernet0/6,
00:03:02 ago
Hold down timer expires in 0 secs
(Gone)
rack1sw1#sh ip route 0.0.0.0 <http://0.0.0.0/>
% Network not in table
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