RE: RIP not installing routes into RIP database

From: Kelvin Yeo (kelvinyeo@xtracommunication.com)
Date: Mon Mar 23 2009 - 17:34:05 ART

Hi,

Typo. I meant RIB(routing table) in this case, sorry.

 My confusion here was; shouldn't EIGRP and RIP maintain a different complete
instance of database, and such maintaince does not take account of AD. I know
that routes will prefer the better AD 90>120 but only if longest match occurs.
I don't think AD is reference for database compilation(this is where I need
clarification)

Thanks tharak.

Kelvin

-----Original Message-----
From: Tharak Abraham <tharakabraham@gmail.com>
Sent: ffd: , 24 d8 f, 2009 4:07 AM
To: Kelvin Yeo <kelvinyeo@xtracommunication.com>
Cc: robclav@gmail.com; Kelvin Yeo <kelvinyeo24@yahoo.com.sg>; Cisco
certification <ccielab@groupstudy.com>
Subject: Re: RIP not installing routes into RIP database

AD is what it matters when we take Rip and Eigrp in this instance.
Rip and Eigrp will have its own databases, but which one does the router
prefer and based on what?
B
120 or 90 (the lower the better).
B
As Rob mentioned and just to cross check the same, you can either increase the
AD of Eigrp above 120B or decrease the AD of Rip below 90 and see !
B
Dont mix up FIB and RIB concepts here as the former is for fast lookup or fast
switching and latter for normal cpu intensive routing table lookup !
B
BR,
Tharak.

On Mon, Mar 23, 2009 at 8:42 PM, Kelvin Yeo <kelvinyeo@xtracommunication.com>
wrote:
Hi Robclav,

Thanks for your response. My understanding is that rip database will install
routes when its received(except posion routes). AD is only compared before
installing into FIB if IOS have the same longest match prefix.

Correct me if im wrong...

Kelvin

-----Original Message-----
From: robclav@gmail.com
Sent: f B f B d: , 24 d8 B f B , 2009 3:26 AM
To: Kelvin Yeo <kelvinyeo24@yahoo.com.sg>; 'Cisco B certification'
<ccielab@groupstudy.com>
 Subject: Re: RIP not installing routes into RIP database

Hi Kelvin,
In order to see what is going on, try to modify RIP administrative distance
from 120 to 80 for instance. Then you will be able to see this route installed
at rip database instead of eigrp one.
 The question is, which one is the purpose for diferents AD? How this is
translated to the route exchange?which routes are installed at rip database?

I hope this help you,
Robclav

BlackBerry de movistar, allm donde estis esta tu oficin@

-----Original Message-----
From: "Kelvin Yeo" <kelvinyeo24@yahoo.com.sg>

Date: Tue, 24 Mar 2009 02:19:47
To: 'Cisco B certification'<ccielab@groupstudy.com>
 Subject: RIP not installing routes into RIP database

Hi Forum,

Quick and short question.

I have 2 routers with a serial connection. RIP and EIGRP process is enabled
on both routers. No filter-list or any list that will filter routes. 1
 loopback has been installed into Router A. RIP and EIGRP has 'network' to
this loopback.

router rip

B version 2

B network 1.0.0.0 B < this is the loopback

B network 192.168.1.0

B no auto-summary

router eigrp 10

B network 0.0.0.0

B no auto-summary

On router B, I can see router A's B loopback in EIGRP topology table, but I
do not see it in RIP database..and I missing some concept here because I
 don't understand this result.

>From B B's 'debug ip rip', I can see it is receiving the update but it just
doesn't install in the RIP database.

*Mar B 1 00:23:18.251: RIP: received v2 update from 192.168.1.1 on Serial1/0

*Mar B 1 00:23:18.251: B B B 1.1.1.0/24 via 0.0.0.0 in 1 hops

Anyone can feedback?

Rdgs,

Kelvin

Blogs and organic groups at http://www.ccie.net

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