I'm getting these in my syslog: Feb 27 11:28:20 mouse ospfd: *** sendmsg in ospf_write failed to <localip>, id 0, off 0, len 68, interface vlan511, mtu 1500: No buffer space available You didn't say how many interfaces you are using, but I'm guessing you have a lot. quagga/ospfd seems to work fine out the box with reasonable numbers of interfaces. I would suggest doing ktrace. It may be that there is a raw socket (proto ospf is not UDP) and a packet is sent on each interface in quick succession and the raw socket needs bigger sendspace. I don't know if udp sendspace is reused for raw sockets.
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