[j-nsp] OSPF problem

[José Esteves]

	Router A	Router B	Router C
__________|_____________|______________|__________
       |                 |                       |                    |
      Router D	Router E	Router F	Router G

Router A is the DR, JunoM20	
Router B is the BDR, JunoM20
Router C,D,E,F,G in 2WAY/DROUTER. Cisco Routers

Since I upgrade the Junos to the JunoOS 6.3R1.3, my OSPF are very instable.

On the BDR I've got the following messages:
RPD_OSPF_NBRUP: OSPF neighbor (ge-1/2/0.0) state changed from Exchange to
Full due to DBD exchange complete
RPD_OSPF_NBRUP: OSPF neighbor (ge-1/2/0.0) state changed from Init to
ExStart due to Two way communication established
RPD_OSPF_NBRDOWN: OSPF neighbor (ge-1/2/0.0) state changed from Full to Down
due to NBR declared dead on inactivity

On the routers C,D,E,F,G I've got the following message:
%OSPF-5-ADJCHG: Process 13156 Nbr 213.228.138.245 on FastEthernet0/0 from
2WAY to DOWN Neighbor Down: Dead timer expired

This is causing momentary loose of communications of 2 to 4 seconds.

With JunoOS 5.1R2.4 this behavior didn't happen. Could be something with
JunoOS 6.3R1.3?

Can anybody help me on this?

Regards,
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