September 2010 - Bird-users

[OSPF] BIRD <> Mikrotik checksum
by Maciej Drobniuch 02 Sep '10

02 Sep '10

Hi! I have a problem with binding bird with mikrotik router os. The RouterOS says: Discarding packet: wrong checksum. In the bird manual we can find "The RFC says that a router should check the checksum of every LSA to detect hardware problems. BIRD does not do this to minimalize CPU utilization." Does the BIRD send checksum in OSPF That is my OSPF config: protocol ospf LandtechOSPF { tick 2; rfc1583compat yes; area 0.0.0.0 { stub no; interface "eth1" { hello 10; retransmit 5; cost 10; transmit delay 5; dead 40; dead count 40; wait 50; type broadcast; }; }; } Thanks for help! -- Pozdrawiam! Maciej Drobniuch

2 1

Checking if bgp_next_hop matches bgp neighbor
by Peter Lieven 02 Sep '10

02 Sep '10

Hi, just wondering what the correct way is to filter if the advertised bgp_next_hop matches the neighbor address in a filter. Would if from != bgp_next_hop then reject; do the trick, or do I have to define a function as inbound filter and pass the neighbor address as a parameter? Thanks, Peter # Kind Regards/Mit freundlichen Gruessen # # PEERING GmbH - Devision ECIX # Lindenallee 27, 14050 Berlin, Germany # # Geschaeftsfuehrer: Stefan Wahl, Peter Lieven # Amtsgericht Charlottenburg, HRB 97752B, USt-Id-Nr: DE2746301838 # # Web: http://www.ecix.de/ # Phone: +49 30 81495450 # Fax: +49 30 81495459

3 2

BGP configuration HELP
by Sami Halabi 01 Sep '10

01 Sep '10

Hi, I'm new to bird, and I need help in configuring my DUAL homed BGP. here is the infrastructure: AS100 is a transit i'm connected to - this transit allows only traffic that was originated by one of its peering AS's to flow over it (IE it doesn't allow traffic destinated to as400 which isn't a peering member, not even through any other memebr, for that reason I'm connected also to AS200), this connection has high bandwidth. AS200 is a member connected to AS100 also, and also to outside AS's (to the world), it should destinate traffic to me according to: 1) if this traffic originated by a member in AS100 or by itself to route throgh AS100, 2) otherwise to route directly through AS300. AS300 is my AS that is connected to AS100 and AS200. i need help in configuring BGP 200 and BGP 300 so that i can do the routing policy as described above. Thanks in advance for your help, Sami

1 0