Wednesday, March 31, 2010

OSPF elections

1. Router ID election
The router ID is used to specify a particular router in a area, which is in ip address format.. the parameter used for router ID election are
a. Manual ID - Statically assigned id.
b. Loopback Address - Dynamically assumed from configuration.
c. Highest Interface
Address - Dynamically assumed from configuration.

In these three parameter's first preference is given to Manual id(if any) else it will check for loopback address(if any) this is second preference else it'll go for last option of choosing highest interface address.

2. Master/slave or DR/BDR election.

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