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VRRP (Virtual Router Redundancy Protocol)

Written by Rene Molenaar on . Posted in Network Services

Scenario:

Internet traffic is becoming more and more important since the company you are working for is focused on e-commerce. Every minute that their webservers running webshops are unavailable is causing profit loss. The company decided need a scalable solution and get rid of the single router (NewJersey), so there is no single point of failure anymore. Up to you to start configuring!

Goal:

  • All IP addresses have been preconfigured as following:

    NewYork: F0/0: 192.168.1.1 /24
    NewYork: F0/1: 192.168.2.1 /24

    NewJersey: F0/0: 192.168.1.2 /24
    NewJersey F0/1: 192.168.2.2 /24

    L.A.: F0/0: 192.168.1.3 /24
    L.A.: F0/1: 192.168.2.3 /24

    HOST: F0/0: 192.168.1.200 /24

    IPS: F0/0: 192.168.2.254 /24
     
  • The ISP router has the following loopback interfaces, these are used to simulate the Internet.

    Loopback0: 172.16.1.1 /24
    Loopback1: 172.16.2.1 /24
    Loopback2: 172.16.3.1 /24
     
  • The host router has been configured with "no ip routing" which will turn it into an ordinary host.
  • OSPF has been configured on all routers except the host router for full connectivity.
  • Configure NewYork, Newjersey and L.A. for VRRP, use the group number "1".
  • The virtual IP Address should be 192.168.1.254 /24 .
  • Newjersey should be the master router, when it fails L.A. should take over.
  • Hello packets should be sent every 7 seconds.
  • Make sure the router with highest priority will always be the Master router.
  • Configure authentication for VRRP, use password "vault".
  • When the HSRP active router's F0/1 interface goes down, make sure it's no longer the master VRRP router.
  • Configure the virtual IP address of VRRP as default gateway on the Host Router.
  • Ensure you can ping the loopbacks of the ISP router from the Host router.
  • Ensure that whenever 2 out of 3 routers are down, the Host router still has connectivity to the ISP.

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IOS:

c3640-jk9s-mz.124-16.bin

Topology:

Virtual Router Redundancy Protocol (VRRP)

Video Solution:

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Comments (9)

  • avatar
    jagger

    Hi!

    One precision concerning this lab... Do i understand correct that to configure VRRP on CISCO firstly we should configure HSRP?

  • avatar
    jagger

    I've configured VRRP and i can ping ISP with 192.168.2.254, but can't ping with loopback ip addresses, is it normal?

  • avatar
    ReneMolenaar

    If you are able to ping the 192.168.2.254 IP address but not from a loopback you have some routing issues. See if the ISP router knows about the destination network where you are sending the ping from. If not you'll have to add some static routes or additional network commands for OSPF.

  • avatar
    jagger

    I see, thanks!

  • avatar
    shadi

    I think the command "ip ospf network point-to-point" should be issued on the loopbacks so that ospf will consider them as normal interface to be advertised with the exact subnet. it worked for me and ospf domain saw them as /24 networks.

  • avatar
    ReneMolenaar

    HSRP and VRRP are similar but two different protocols, You'll choose one of the two if you want a virtual gateway. HSRP is a Cisco proprietary protocol and VRRP is a standard. They are 90% similar but there are a couple of differences between them...

  • avatar
    vishuetc

    Thank You.. It was helpful !!!!

  • avatar
    mistborn_soother

    Very good lab.Thanks Rene
    But may I make a suggestion. If you want to see the host's pings fail as the master router's priority decrements and the backup takes over that role, then you should ensure that interface fa0/0 on New York, New jersey and LA are not forming adjacencies on those interfaces.In other words make them passive. I think this is a nice way to see how long it will take for the routers to fail over from the host's point of view.

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