lowering OSPF memory requirements

29 Aug 2003

      Hi all,

I am trying to use bird's OSPF implementation in a memory contrained linux
environment.  I have only 2 MB of RAM.  Can you give me some tips on how to
reduce the memory footprint of bird running OSPF?  It is currently using about
1 MB, and I would like to try to cut that by 200 KB or so..

FYI, I am running this on a wireless network.  Below I have pasted in my
bird.conf file.  The 8 wlan0wdsX interfaces are point-to-point wireless links
(/30 IP networks) that connect repeaters together.  Only the ones with cost
less than 1000 are connected.  These boxes have 1 ethernet and 1 wlan.

Thanks,

Jack

log stderr all;

debug protocols all;

protocol static {
        route 0.0.0.0/0 via 10.96.127.82;
        export all;
}

protocol kernel {
        persist;
        scan time 20;
        export all;
}

protocol direct {
        interface "eth0";
        interface "wlan0";
        interface "wlan0wds0";
        interface "wlan0wds1";
        interface "wlan0wds2";
        interface "wlan0wds3";
        interface "wlan0wds4";
        interface "wlan0wds5";
        interface "wlan0wds6";
        interface "wlan0wds7";
}

protocol device {
        scan time 10;
}

protocol ospf {
  export all;
  import all;
  area 0.0.0.0 {
    tick 8;
    interface "eth0" {
      cost 1;
      hello 15;
      priority 100;
      retransmit 7;
      authentication simple;
      password "asdfasdf";
    };
    interface "wlan0" {
      cost 5;
      hello 15;
      priority 100;
      retransmit 7;
      authentication simple;
      password "asdfasdf";
    };
    interface "wlan0wds0" {
      cost 44;
      hello 15;
      priority 100;
      retransmit 7;
      authentication simple;
      password "asdfasdf";
    };
    interface "wlan0wds1" {
      cost 1000;
      hello 15;
      priority 100;
      retransmit 7;
      authentication simple;
      password "asdfasdf";
    };
    interface "wlan0wds2" {
      cost 1000;
      hello 15;
      priority 100;
      retransmit 7;
      authentication simple;
      password "asdfasdf";
    };
    interface "wlan0wds3" {
      cost 1000;
      hello 15;
      priority 100;
      retransmit 7;
      authentication simple;
      password "asdfasdf";
    };
    interface "wlan0wds4" {
      cost 1000;
      hello 15;
      priority 100;
      retransmit 7;
      authentication simple;
      password "asdfasdf";
    };
    interface "wlan0wds5" {
      cost 1000;
      hello 15;
      priority 100;
      retransmit 7;
      authentication simple;
      password "asdfasdf";
    };
    interface "wlan0wds6" {
      cost 1000;
      hello 15;
      priority 100;
      retransmit 7;
      authentication simple;
      password "asdfasdf";
    };
    interface "wlan0wds7" {
      cost 47;
      hello 15;
      priority 100;
      retransmit 7;
      authentication simple;
      password "asdfasdf";
    };
  };
}

lowering OSPF memory requirements

Jack Culpepper