May 2013 - Bird-users - Mailing Lists

[PATCH] Locking in BGP proto generates deadlocks with link-local addresses
by Fritz Grimpen 09 May '13

09 May '13

Hi. Today I have figured out that BIRD will generate a deadlock if you are using the same remote address on multiple BGP protocols: protocol bgp { neighbor fe80::1%tun1 as 1; local fe80::2 as 2; } protocol bgp { neighbor fe80::1%tun2 as 1; local fe80::2 as 3; } In this case, only one of these protocols will change it's state and the other will stuck in Idle state forever. Here is my patch: cat <<PATCH diff --git a/proto/bgp/bgp.c b/proto/bgp/bgp.c index 0f351b4..b1594b9 100644 --- a/proto/bgp/bgp.c +++ b/proto/bgp/bgp.c @@ -840,7 +840,6 @@ bgp_start(struct proto *P) lock->iface = p->cf->iface; lock->type = OBJLOCK_TCP; lock->port = BGP_PORT; - lock->iface = NULL; lock->hook = bgp_start_locked; lock->data = p; olock_acquire(lock); PATCH Fritz.

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ECMP on 2 x 1ge Linux hosts
by Bao Nguyen 08 May '13

08 May '13

I'm trying out OSPF ECMP on BIRD (with ECMP set and enabled on kernel) and on hosts A and host B are configured as below and connected via a switch, the dummy0 interface is used as the loopback address for two physical nics. host A eth1 - /30 - OSPF eth0 - /30 - OSPF dummy0 - /32 host B eth1 - /30 - OSPF eth0 - /30 - OSPF dummy0 - /32

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JUNOS and BIRD OSPF ptp netmask 0.0.0.0 mismatch problem
by Bao Nguyen 07 May '13

07 May '13

Hello all, I'm running BIRD 1.3.4 with JUNOS and I ran into the issue of "netmask 0.0.0.0" was seen by JUNOS as it's not being sent by BIRD on a OSPF point-to-point link per RFC spec but JUNOS perform strict check on it. There seemed to be quite a bit of discussions about this online [1][2] and I'm wondering if anyone got a better alternatives then switching to link broadcast mode? I also looked at BIRD code, it seemed like someone have applied a patch for a "ptp netmask" option on in April 17 to work around this issue but upgrading BIRD is not an option at this point. [1] https://kb.juniper.net/InfoCenter/index?page=content&enablesaml=yes&id=KB23… [2] http://forums.juniper.net/t5/Junos-and-Junosphere/ospf-point-to-point-inter… thanks, -bn 0216331C

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unnecessary and frequency kernel routing update
by Slawa Olhovchenkov 02 May '13

02 May '13

bird router got from BGP peer update don't change routing table: 26-04-2013 15:49:55 <TRACE> le2 > added [best] 209.142.140.0/24 via 10.90.90.92 on vlan1 and send unneeded routing update to kernel (old route is same): 26-04-2013 15:49:55 <TRACE> kernel1 < replaced 209.142.140.0/24 via 10.90.90.92 on vlan1

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BGP is not coming up: Error: Invalid next hop
by Timur Irmatov 01 May '13

01 May '13

Hi. We have a pretty simple BGP configuration with bird: protocol static static_isp { import all; route <net1>/22 via <gw>; route <net2>/23 via <gw>; } protocol bgp isp { disabled on; import none; export where proto = "static_isp"; local as <X>; neighbor <nei> as <Y>; } Initially, we configured network interface with wrong ip address, then after fixing this, bird gives us this error after reconfiguration (Error: Invalid next hop). What's the problem? We could tried restarting bird but this is production router (we have replaced Cisco router with this Linux box) and we woudn't want to do that unless this is really needed. -- Timur Irmatov

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