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1. Anuj Kumar
ciscobulls@gmail.com
CCNP SWITCH
PORTABLE STUDY GUIDE
&
PRACTICE WORK BOOK
ANUJ KUMAR
email:- ciscobulls@gmail.com
anuj_dev007@yahoo.com
networkbulls.com

2. Anuj Kumar
ciscobulls@gmail.com
VRRP
Virtual Router Redundancy Protocol
Feature: -
 Like HSRP, VRRP is a default gateway redundancy method.
 RFC 2338
 Similar in functionality to HSRP
 The virtual router, representing a group of routers, is known as a VRRP group.
 Cisco switches and routers support VRRP on Ethernet, Fast Ethernet, and Gigabit Ethernet interfaces, and on
MPLS VPNs and VLANs.
 The virtual router can use a physical IP address or a virtual IP address.
 VRRP group no range 0 to 255.
 VRRP router priority range from 1 to 254 (100 is the default priority of VRRP router)
 VRRP provides on redundant gateway address from a group of routers. The Active router is called Master router,
even all other router are in backup state. The master router has highest priority in the VRRP group.
 VRRP sends its advertisements to the multicast address 224.0.0.18.
 It using IP protocol 445.
 The advertisement interval timer (default 1 second, hold 3 second)
 Preempt is by default is enable, you can manually disable it.
 It uses two types authentication for advertisement.
Configuration of VRRP

3. Anuj Kumar
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R1(config)# int s0/0
R1(config-if)#ip address 10.1.1.2 255.255.255.0
R1(config-if)#no shutdown
R1(config-if)#int s0/1
R1(config-if)#ip address 11.1.1.2 255.255.255.0
R1(config-if)#no shutdown
R1(config-router)#network 10.1.1.0 0.0.0.255
R1(config-router)#network 11.1.1.0 0.0.0.255
R1(config-router)#no auto-summary
R1(config-router)#network 192.168.102.0
R1(config-router)#exit
R1(config-if)#int f0/0
R1(config-if)#ip address 192.168.102.1 255.255.255.0
R1(config-if)#no sh
R2(config)# int s0/0
R2(config-if)#ip address 10.1.1.1 255.255.255.0
R2(config-if)#no shutdown
R2(config-if)#int f0/0
R2(config-if)#ip address 192.168.101.2 255.255.255.0
R2(config-if)#no shutdown
R2(config-if)#router ei 100
R2(config-router)#network 192.168.101.0
R2(config-router)#network 10.1.1.0 255.255.255.0
R2(config-router)#no network 10.1.1.0 255.255.255.0
R2(config-router)#network 10.1.1.0 0.0.0.255
R2(config-router)#no auto-summary
R2(config)#int f0/0
R2(config-if)#vrrp 1 ip 192.168.101.1
*Mar 1 00:45:34.391: %VRRP-6-STATECHANGE: Fa0/0 Grp 1 state Init -> Backup
*Mar 1 00:45:38.003: %VRRP-6-STATECHANGE: Fa0/0 Grp 1 state Backup -> Master
*Mar 1 00:45:34.391: %VRRP-6-STATECHANGE: Fa0/0 Grp 1 state Init -> Backup
As we change priority manually
R2(config-if)#vrrp 1 priority 101
*Mar 1 00:51:36.235: %VRRP-6-STATECHANGE: Fa0/0 Grp 1 state Backup -> Master
Tracking
R2(config)#track 1 interface serial 0/0 line-protocol
R2(config)#int f0/0
R2(config-if)#vrrp 1 track 1
R3(config)# int f0/0
R3(config-if)#ip address 192.168.101.3 255.255.255.0
R3(config-if)#no shutdown
R3(config-if)#int s0/0
R3(config-if)#ip address 11.1.1.1 255.255.255.0

4. Anuj Kumar
ciscobulls@gmail.com
R3(config-if)#no shutdown
R3(config-if)#router ei 100
R3(config-router)#network 192.168.101.0
R3(config-router)#network 11.1.1.0 0.0.0.255
R3(config-router)#no auto-summary
R3(config)#int f0/0
R3(config-if)#vrrp 1 ip 192.168.101.1
*Mar 1 00:47:13.987: %VRRP-6-STATECHANGE: Fa0/0 Grp 1 state Init -> Backup
*Mar 1 00:47:17.599: %VRRP-6-STATECHANGE: Fa0/0 Grp 1 state Backup -> Master
Note: - first we implement VRRP, In VRRP which has highest router id it will become Master.
*Mar 1 00:51:35.711: %VRRP-6-STATECHANGE: Fa0/0 Grp 1 state Master -> Backup
Tacking
R3(config)#track 1 interface serial 0/0 line-protocol
R3(config)#interface f0/0
R3(config-if)#vrrp 1 track 1
Verifying Command: -
R2#sh vrrp
FastEthernet0/0 - Group 1
State is Master
Virtual IP address is 192.168.101.1
Virtual MAC address is 0000.5e00.0101
Advertisement interval is 1.000 sec
Preemption enabled
Priority is 101
Track object 1 state Up decrement 10
Master Router is 192.168.101.2 (local), priority is 101
Master Advertisement interval is 1.000 sec
Master Down interval is 3.605 sec
R3# sh vrrp
FastEthernet0/0 - Group 1
State is Backup
Virtual IP address is 192.168.101.1
Virtual MAC address is 0000.5e00.0101
Advertisement interval is 1.000 sec
Preemption enabled
Priority is 100
Track object 1 state Up decrement 10
Master Router is 192.168.101.2, priority is 101
Master Advertisement interval is 1.000 sec

5. Anuj Kumar
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Master Down interval is 3.609 sec (expires in 2.761 sec)
R2#sh vrrp brief
Interface Grp Pri Time Own Pre State Master addr Group addr
Fa0/0 1 101 3605 Y Master 192.168.101.2 192.168.101.1
R3#sh vrrp brief
Interface Grp Pri Time Own Pre State Master addr Group addr
Fa0/0 1 100 3609 Y Backup 192.168.101.2 192.168.101.1