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Re: quagga ospfd not happy, suspecting kernel tuning‏

  I'm getting these in my syslog:

  Feb 27 11:28:20 mouse ospfd[22629]: *** sendmsg in ospf_write failed to
  <localip>, id 0, off 0, len 68, interface vlan511, mtu 1500: No buffer space

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

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