Thursday, August 16, 2012

Some info about OSPF

OSPF uses hello protocol


In OSPF Hello messages are sent every 10(some people tune it,make it even 2 seconds) seconds on broadcast/point to point networks and every 30 seconds on NBMA(Non Broadcast Multi Access such as Frame Relay) Networks

Hello message contains information such as

Router ID(name of the router)

Hello and Dead Timers(how often they are saying and this has to match between the neighbours)

Network Mask(subnet mask and this has to match between the neighbours)

Area ID(the area they are in and this has to match between the neighbours)

Neighbours(they have to match)

Router Priority

DR/BDR IP Adress

Authentication Password(this has to match)

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