I have two site with distance of 10 km (sea between).
I use a primary link with BR350 (wifi bridge) and I have installed a redudancy link with adsl and DMVPN, the redudancy is provide by OSPF routing.
I use on main site a 4500 and 1811 (dmvpn), remote site 3550 (L3) and 1811 (dmvpn)
The link between sites use a vlan with interconnection network (for routing)
The problem is that the primary link (wifi bridge) sometimes lost the communication during 30 seconds, minuts or hours , problem with high boat in the bay (it's not a joke)
And in this case the ospf routing need 35 seconds to use the second link. but as the lost of the primary link sometime is few minuts, my routing is flapping, but it's normal.
Then I migrate to a second architecture with an OSPF cost equal.
It works, If I use traceroute I use sometime the primary link or primary , depend of source and destination IP addresses
I have configured the opsf maximum-path as 2 .
The problem is the same when one of links is lost the ospf need 35 seconds for adjacency. and all my trafic is lost during this phase.
My questions is how can I optimize the time to minimize the lost of packet. Do I need to use a lower ospf timer. use other routing ptotocol like eigrp, mixed dynamic routing and static
Optimize the load balancing on switch (3550 and 4500) with cef and destination per packet ?