Unanswered Question
Mar 31st, 2009

Can anyone explain to me what are the keepalives for? Do keepalives work on layer 2 or are they used on layer 3 routing protocols like EIGRP and OSPF. I am asking because OSFP for example uses dead intervals so what would be the point of having keepalives?

I have this problem too.
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bsudol79p Tue, 03/31/2009 - 12:07

OK, so if I disable the keepalives on both interfaces on the routers that will still keep the connection alive correct? And I can just let the OSFP handle the connection with Hello packets?

lamav Tue, 03/31/2009 - 11:58

OSPF uses keepalives to track the health of its neighbor.

If it does not receive keepalives for a certain time interval (dead interval), it declares the neighbor dead.

A Hello of 10 seconds and a dead interval of 30 seconds means that an OSPF neighbor will expect to receive a Hello every 10 seconds. If it doesnt receive any hellos after 30 seconds, it declares the neighbor dead.


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