Solved

RIP V2 MD5 authentication

Posted on 2012-03-29
10
497 Views
Last Modified: 2014-08-09
Hi, I want to implement RIP V2 MD5 authentication in an existing network. RIP V2 is up and running already. If I turn on MD5 authenticattion on a router or switch, will it lose connectivity with the rest of the network until I can turn on authentication on the rest of the network devices.
0
Comment
Question by:rajaroraus
10 Comments
 
LVL 2

Expert Comment

by:FostWare
ID: 37782777
It may seem a stupid question, why are you using RIP in particular?
0
 
LVL 13

Expert Comment

by:Sandy
ID: 37782780
no this will not loose the connectivity until unless you configured it for auth required mode.
0
 
LVL 11

Expert Comment

by:Khandakar Ashfaqur Rahman
ID: 37783101
It won't lose the connection immediately .But after you enable MD5 into router it'll generate error "Invalid Authentication".If you debug then you can see this error.
#debug ip rip
After few seconds routes will become down and it'll show : Routes are possibly down.Then  after few moments routes will be deleted by flush timers.
0
 

Author Comment

by:rajaroraus
ID: 37783302
so rigan123, you're saying that it will loose connectivity?(few Seconds)?
0
Microsoft Certification Exam 74-409

Veeam® is happy to provide the Microsoft community with a study guide prepared by MVP and MCT, Orin Thomas. This guide will take you through each of the exam objectives, helping you to prepare for and pass the examination.

 
LVL 11

Expert Comment

by:Khandakar Ashfaqur Rahman
ID: 37783575
It'll live few moments.Then after few moments it'll become down completely.Because flush timers will update "Invalid Authentication" error.Your existing routes will be deleted too.
0
 

Author Comment

by:rajaroraus
ID: 37783651
so how would you recommend doing this?
0
 
LVL 11

Accepted Solution

by:
Khandakar Ashfaqur Rahman earned 250 total points
ID: 37785085
You need to configure all the routers MD5 at the same time.At first, write down all of your router's new configuration and double check that configuration is ok.You can use Cisco Packet Tracer software to verify your configuration.
http://www.ccna4u.org/2010/11/packet-tracer-version-531-software.html
Then configure remote router first.Then step by step configure other routers.
0
 
LVL 15

Assisted Solution

by:Nayyar HH (CCIE RS)
Nayyar HH (CCIE RS) earned 250 total points
ID: 37787467
RIP authentication is configured on a per interface basis; changes you make will only after that link, so if you have redundant paths in your network you should be OK.

Another option to consider is to increase the flush time; This is the amount of time (in seconds) that must pass before a route is removed from the routing table

Command

timers basic update invalid holddown flush [sleeptime]

I also support the practise of configuring devices further downstream first and working backwards

In addition use the "reload in" command to reload the box should things go wrong;
0

Featured Post

VMware Disaster Recovery and Data Protection

In this expert guide, you’ll learn about the components of a Modern Data Center. You will use cases for the value-added capabilities of Veeam®, including combining backup and replication for VMware disaster recovery and using replication for data center migration.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

We recently endured a series of broadcast storms that caused our ISP to shut us down for brief periods of time. After going through a multitude of tests, we determined that the issue was related to Intel NIC drivers on some new HP desktop computers …
This is the first one of a series of articles I’ll be writing to address technical issues that are always referred to as network problems. The network boundaries have changed, therefore having an understanding of how each piece in the network  puzzl…
Viewers will learn how to properly install and use Secure Shell (SSH) to work on projects or homework remotely. Download Secure Shell: Follow basic installation instructions: Open Secure Shell and use "Quick Connect" to enter credentials includi…
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…

911 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

18 Experts available now in Live!

Get 1:1 Help Now