- Bird-users - Mailing Lists

BGP keepalive_time
by Arvin Gan 08 Jun '18

08 Jun '18

Hi all, When I used bird, found a question that BGP session received OPEN message, hold_time is updated with min(config_hold_time, peer_hold_time), but keepalive_time is not updated if keepalive_time is not zero, that maybe cause keepalive_time is more than the updated hold_time after received OPEN message. Line 702 in packets.cc for bgp protocol : conn->keepalive_time = p->cf->keepalive_time ? : conn->hold_time / 3; RFC 4271: 4.4. KEEPALIVE Message Format BGP does not use any TCP-based, keep-alive mechanism to determine if peers are reachable. Instead, KEEPALIVE messages are exchanged between peers often enough not to cause the Hold Timer to expire. A reasonable maximum time between KEEPALIVE messages would be one third of the Hold Time interval. KEEPALIVE messages MUST NOT be sent more frequently than one per second. An implementation MAY adjust the rate at which it sends KEEPALIVE messages as a function of the Hold Time interval. Thanks Arvin

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dependent ospf areas
by Илья Шипицин 06 Jun '18

06 Jun '18

hello, we use BIRD with 2 ospf areas: external and internal. can someone give an advice how to implement dependent filters? i.e. "if there are no neighbors on internal, so do not export anything on external"? and "if there at least one neighbor on internal, export routes on external" thanks! Ilya Shipitsin

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BIRD router/route server functions
by Rae Ho (ITSC) 04 Jun '18

04 Jun '18

Dear All, I'm Rae of CUHK. We are exploring BIRD router/route server functions. Now I set up 2 BIRD routers to from BGP session between them, seems It can't form the peering (in active status). Questions: 1. Is there any pre-config need to be set up? (i.e. interface? Internal Subnet?) 2. Would you mind sending me some sample configurations? Rae

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BGP origin attribute
by Arvin Gan 01 Jun '18

01 Jun '18

Hi All, I notice the origin attribute in function bgp_update_attrs , if route source is BGP, I think it should set as ORIGIN_IGP, not INCOMPLETE, according to RFC or Cisco device . It seems there is mistake on Line 1443 in attrs.c . Line 1443: bgp_set_attr_u32(&attrs, pool, BA_ORIGIN, 0, src ? ORIGIN_INCOMPLETE : ORIGIN_IGP); ð bgp_set_attr_u32(&attrs, pool, BA_ORIGIN, 0, src ? ORIGIN_IGP : ORIGIN_INCOMPLETE ); // correct? Thanks Arvin

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bgp_next_hop check?
by Job Snijders 29 May '18

29 May '18

Dear BIRD devs, On https://gitlab.labs.nic.cz/labs/bird/wikis/BGP_filtering I see the following curious snippet: function xx() { ... if bgp_next_hop != from then return false; ... } What in the above example does "from" mean? Is "from" some kind of magic keyword that expands into something? Kind regards, Job

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Static route bgp_next_hop attribute.
by oldnick nsp 29 May '18

29 May '18

Hi all! I'm trying to use Bird to announce route with predefined bgp next hop and to avoid filter manipulation on this route to set next-hop on it. My goal is to put route configuration into separate include file with fewer lines as possible. Relevant part of my config is as follows: protocol bgp 'test_nbr' { local as 65001; neighbor 10.0.0.2 as 65002; hold time 30; multihop 5; import all; export all; next hop keep; } protocol static test { route 192.168.0.1/32 blackhole { bgp_next_hop = 172.16.0.1; }; } I can see that route has bgp_next_hop attribute with command "show route all": bird> show route all 192.168.0.1/32 blackhole [test 07:05:07] * (200) Type: static unicast univ BGP.next_hop: 172.16.0.1 But when neighbor receives this announce, it still gets the peer address as a next-hop. This is debug output at neighbor side: *May 29 14:05:02.327: BGP(0): 10.0.0.1 rcvd UPDATE w/ attr: nexthop 10.0.0.1, origin i, merged path 65001, AS_PATH *May 29 14:05:02.331: BGP(0): 10.0.0.1 rcvd 192.168.0.1/32 So, the question is: is there any way to keep bgp_next_hop attribute from static route into protocol bgp announces? -- Regards, Sergey

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BGP Monitoring Protocol (BMP) support in Bird?
by Emerson Barea 29 May '18

29 May '18

Hi, is there BGP Monitoring Protocol support in Bird? I didn't get this information in Bird docs. Thank you. Tocha.

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bird-2.0.2: centos 7 rpm ?
by Илья Шипицин 28 May '18

28 May '18

hi, I wonder if there's official centos 7 repo. if there's no such a repo, what do you think about fedora copr ? I can maintain such a repo

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BGP Monitoring Protocol (BMP) support in Bird?
by Emerson Barea 24 May '18

24 May '18

Hi, is there BGP Monitoring Protocol support in Bird? I didn't get this information in Bird docs. Thank you. Tocha.

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Recall: [bird-support #899727] RFC 3107 - Carrying Label Information in BGP - Config Support
by Thiruvazhiyan Lakshmanan 23 May '18

23 May '18

Thiruvazhiyan Lakshmanan would like to recall the message, "[bird-support #899727] RFC 3107 - Carrying Label Information in BGP - Config Support ". ============================================================================================================================ Disclaimer: This message and the information contained herein is proprietary and confidential and subject to the Tech Mahindra policy statement, you may review the policy at http://www.techmahindra.com/Disclaimer.html <http://www.techmahindra.com/Disclaimer.html> externally http://tim.techmahindra.com/tim/disclaimer.html <http://tim.techmahindra.com/tim/disclaimer.html> internally within TechMahindra. ============================================================================================================================

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