OSPF Fast Hello

[Javier Lorenzo Prieto]

We are using BIRD to configure load balancing and redundancy between two sites. These sites are interconnected via two short-range RF links (each with 15 Mpbs effective throughput and delay of 5ms). Because we intend to send VoIP over these links and would like to avoid dropping calls in the event of interruptions in one of the links. Therefore, dynamic routes need to be updated very quickly.

            ---------
SITE 1 -- R1         R2 -- SITE 2
            ---------

Does BIRD allow setting the parameters as follows?
•	dead 2
•	hello 1

protocol ospf {
        import all;
        ecmp on;
        area 0.0.0.0 {
                interface "vlan200", "vlan201" {
                        cost 5;
                        check link on;
                        type broadcast;
                        hello 1;
                        retransmit 4;
                        wait 1;
                        dead 2;
                        authentication none;
                        };
                };
}


When we try this configuration, our routers never reach the point of creating adjacency. However, everything works OK when setting dead=3 and hello=1. Furthermore the parameters dead=2 and hello=1 do work when using QUAGGA.

Am I missing anything?

Thanks in advance for your help!

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