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BLR-OIMS-RTR01
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Gi0/0
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MPLS
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Virtual IP address 10.1.2.1
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Gi0/0
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BLR-OIMS-RTR02
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GLBP step-by-step configuration.
On R1:
BLR-OIMS-RTR01 (config)#interface fa0/0
BLR-OIMS-RTR01 (config-if)#ip address 10.1.2.2 255.255.255.0
BLR-OIMS-RTR01 (config-if)#glbp 1 ip 10.1.2.1
BLR-OIMS-RTR01 (config-if)#glbp 1 priority 130
BLR-OIMS-RTR01 (config-if)#glbp 1 preempt
BLR-OIMS-RTR01 (config-if)#glbp 1 load-balancing round-robin
On R2:
BLR-OIMS-RTR02 (config)#interface fa0/0
BLR-OIMS-RTR02 (config-if)#ip address 10.1.2.3 255.255.255.0
BLR-OIMS-RTR02 (config-if)#glbp 1 ip 10.1.2.1
BLR-OIMS-RTR02 (config-if)#glbp 1 load-balancing round-robin
Explanation of the configuration above:
The glbp group number here is 1
The Router1 is configured to be the AVG and
it will act as the AVF for for the group and is responsible
for the virtual IP address because it has a higher priority which is 130.
The Router 2 is a member of the same GLBP group
and is designated as the AVF should the AVG fail. R2 priority is default
100.
When an ARP request to the virtual ip address
arrives at R1, it will respond with two different MAC address according
to round-robin method, as this case may be.
Then, two clients’s (PC 1 and PC2) traffic will go through
different routers. First, through R1 and the other will go through R2.
If router 1 becomes unavailable, client 1 does not lose access to
CONNECTION because router 2 assumes responsibility for forwarding packets
sent to the virtual MAC address of router 1 and for responding to packets
sent to its own virtual MAC address. This will enable router 2 as the AVG for
the group. Communication for the GLBP members will not be interrupted
despite the failure of a router in the GLBP group.
- See more at:
http://www.orbit-computer-solutions.com/How-To-Configure-GLBP-on-Cisco-Routers.php#sthash.EPy64l2N.dpuf
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