OSPF Neighbors inactivity on 8.0-STABLE

[Andrew Rikhlivsky]

I have a few NASes based on FreeBSD 7.2-RELEASE and quagga 0.99.14 and 
they all have the same
configuration with little changes.

When I add to network a test server based on FreeBSD 8.0-STABLE
with quagga 0.99.15, other servers doesn't receive HELLO packets from him.

On nas9# tcpdump -i vr0 proto ospf

13:24:04.591907 IP 193.62.62.14>  OSPF-ALL.MCAST.NET: OSPFv2,
Hello, length 44
13:24:09.594136 IP 193.62.62.14>  OSPF-ALL.MCAST.NET: OSPFv2,
Hello, length 44
13:24:14.596375 IP 193.62.62.14a>  OSPF-ALL.MCAST.NET: OSPFv2,
Hello, length 44
13:24:19.598678 IP 193.62.62.14>  OSPF-ALL.MCAST.NET: OSPFv2,
Hello, length 44
13:24:24.600867 IP 193.62.62.14>  OSPF-ALL.MCAST.NET: OSPFv2,
Hello, length 44
13:24:29.603050 IP 193.62.62.14>  OSPF-ALL.MCAST.NET: OSPFv2,
Hello, length 44
13:24:34.605322 IP 193.62.62.14>  OSPF-ALL.MCAST.NET: OSPFv2,
Hello, length 44
13:24:39.607564 IP 193.62.62.14>  OSPF-ALL.MCAST.NET: OSPFv2,
Hello, length 44
13:24:44.609799 IP 193.62.62.14>  OSPF-ALL.MCAST.NET: OSPFv2,
Hello, length 44

# uname -a
FreeBSD localhost 8.0-STABLE FreeBSD 8.0-STABLE #0: Fri Feb 19 19:33:17 
UTC 2010     root at localhost:/usr/obj/usr/src/sys/nas9  i386
# ospfd -v
ospfd version 0.99.15


Counter of multicast packets on switch port constantly increasing.
What the reason of inaccessibility other servers over multicast?