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12. CONFIGURE LAYER 3 REDUNDANCY WITH VRRP

HOW TO CONFIGURE LAYER 3 REDUNDANCY WITH VRRP
 
Interface IP Address Configuration : 
  
R1 
 
Interface  IP Address   Subnet Mask 
S 0          3.3.3.2           255.0.0.0 
S 1          2.2.2.2           255.0.0.0 
E 0          20.1.1.1         255.0.0.0
 
R2 
 
Interface  IP Address   Subnet Mask 
S 0/2        3.3.3.1           255.0.0.0 
E 0/0       10.1.1.1          255.0.0.0 
 
R3 
 
Interface  IP Address   Subnet Mask 
S 1           2.2.2.1          255.0.0.0 
E 0/0     10.1.1.2         255.0.0.0 
 
SW1 
 
Ports   VLAN Assigned   Connected To 
FA 0/1  VLAN 1   R3 (10.1.1.2) 
FA 0/3  VLAN 1   R2 (10.1.1.1) 
FA 0/5  VLAN 1   PC 1 (10.1.1.3) 
 
Task 1 
 
Configure routing protocol (RIP) on R1, R2, and R3. 
Configure ports fa0/3, fa0/1 & fa0/5 as access ports on SW1 
Configure VRRP group 1 on R2 & R3, using the virtual ip address 10.1.1.10. 
 
R2 
 
Int fa 0/0 
Vrrp 1 ip 10.1.1.10 
Vrrp 1 priority 200 
Vrrp 1 timers advertise 4 
Vrrp 1 preempt 
 
R3 
 
Int e 0/0 
Vrrp 1 ip 10.1.1.10 
Vrrp 1 priority 100 
Vrrp 1 timers learn 
Vrrp 1 preempt 
 
 
Verification : 
 
R2#show vrrp brief 
 
The output displays that this router is master and virtual ip address is 10.1.1.10 
 
R3#show vrrp brief 
 
The output displays that this router is backup router 
 
From PC1: tracerrt 20.1.1.1
 
When packets sent to network 20.1.1.1 from PC1 (10.1.1.3), the packet first reaches 
10.1.1.1 (master) and finally reaches the destination.   
 
Shut down the interface Fa0/0 on router 2 and traceroute . 
 
R3#debug vrrp packets 
 
The output displays the transition of backup to master on R3. 
 
R3#show vrrp brief 
 
The output displays that R3 is master now. 
 
From PC1: tracert 20.1.1.1
 
When traceroute from PC1 to 20.1.1.1, the output displays that packet is reaching 
20.1.1.1 via 10.1.1.2.
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