December 2013 - Bird-users

IS-IS
by kveri new 01 Jun '15

01 Jun '15

Hello, I would like to implement IS-IS as a part of my master thesis. Are there any apparent problems which would prevent successful implementation, political and/or technical? Also I would like to hear opinions of the authors. Implementation timeframe is 2013 (if we live past 21th). Regards, Martin Čechvala Faculty of Informatics and Information Technologies Slovak Technical University

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OSFP LSA_MAXSEQNO problems
by Alexander V. Chernikov 23 Feb '14

23 Feb '14

Hello list! Currently bird performs LSA premature aging in very strange way which sometimes upsets quagga (up to SIGSEGV) and Cisco. Every time aging is done via setting seq number to LSA_MAXSEQNO. RFC 2328, on the opposite, shows us only 2 cases where MaxSequenceNumber is used in outgoing LSAs: 1) Self LSA originating with given seq num (very rare event) 2) [Premature] Aging of LSA from 1) because a) disappeared net and b) seq number increase (12.1.6) For all other cases seq number should be either increased or left intact. Bird, however, insist on setting LSA_MAXSEQNO while: 1) Receiving self-originating LSA which is not in local LSDB ( ospf_lsupd_receive ) which is not a special case according to 14.1 2) In all other places like handling if-down, external route disappear, etc... ( ospf_lsupd_flush_nlsa ) IT takes noticeable time (sometimes up to 5 seconds) for Cisco 65XX with ~40 neighbors to age given LSA (however it seems that problem is repeatable for ASR9k, too). And while such LSA is in database, every new update is ignored due to 13 step (8). (I've got full logs and pcap for given situation). Can we please consider applying attached patch to make it more compliant?

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[PATCH] Add the ability for a sysconfig file to determine extra parameters for bird
by Alex Bligh 06 Feb '14

06 Feb '14

On Ubuntu / Debian, you can use /etc/default/bird{,6} to specify parameters to be passed to the bird daemon. As far as I can tell, using the rpm spec file in the current srpm, you can't. I do NOT claim to be a Redhat expert, but a patch like this would seem to provide equivalent functionality. I am taking it /etc/sysconfig is the right place. Signed-off-by: Alex Bligh <alex(a)alex.org.uk> --- misc/bird.init | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/misc/bird.init b/misc/bird.init index 56842bf..7556dc5 100755 --- a/misc/bird.init +++ b/misc/bird.init @@ -22,6 +22,9 @@ BIRD4="yes" BIRD6="yes" +BIRD4ARGS= +BIRD6ARGS= + [ -f /etc/bird.conf ] || BIRD4="no" [ -f /usr/sbin/bird ] || BIRD4="no" [ "${NETWORKING}" = "yes" ] || BIRD4="no" @@ -30,6 +33,8 @@ BIRD6="yes" [ -f /usr/sbin/bird6 ] || BIRD6="no" [ "${NETWORKING_IPV6}" = "yes" ] || BIRD6="no" +[ -e /etc/sysconfig/bird ] && . /etc/sysconfig/bird + RETVAL=0 # See how we were called. @@ -38,7 +43,7 @@ case "$1" in if [ "$BIRD4" = "yes" ] then echo -n "Starting BIRD for IPv4: " - daemon bird + daemon bird ${BIRD4ARGS} RETVAL=$? echo [ $RETVAL -eq 0 ] && touch /var/lock/subsys/bird @@ -46,7 +51,7 @@ case "$1" in if [ "$BIRD6" = "yes" ] then echo -n "Starting BIRD for IPv6: " - daemon bird6 + daemon bird6 ${BIRD6ARGS} RETVAL=$? echo [ $RETVAL -eq 0 ] && touch /var/lock/subsys/bird6 -- 1.7.9.5

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Installation error
by Radoslaw Rams 01 Jan '14

01 Jan '14

Hello all, I have problem installing BIRD 1.3.11 (same problem with 1.4) on Debian (rel. 7.3). After installing libreadline6-dev library configuration passed with following result: BIRD was configured with the following options: Source directory: . Object directory: obj Iproute2 directory: /etc/iproute2 System configuration: ./sysdep/cf/linux.h Debugging: no Routing protocols: bgp ospf pipe rip static Client: yes But when I run make command I get error: .... ../../client/birdc.c:16:20: fatal error: curses.h: File or catalog not found compilation terminated. make[2] : *** [birdc.o] Error 1 make[2] : Leaving '/home/user/bird-1.4/obj/client' catalog make[1] : *** [subdir] Error 2 make[1] : Leaving '/home/user/bird-1.4/obj' catalog make: *** [all] Error 2 Best regards, Radoslaw

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feature request: ecmp hash algorithm
by k simon 31 Dec '13

31 Dec '13

Hi,list, I planed use bird box as a load balancer, but I did'nt know bird's ecmp implemention weather support per-connection or per-packet.(I used FREEBSD platform.) And now, bird cannot config ECMP hash algorithm FTOS 9.2(0.0)/9.2(0.2) Configuration Guide for the S4820T System , such as SIP, DIP ,SIP XOR DIP, port etc, base on tulple. Support it will be cool. thanks Simon

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Blackhole for DDoS mitigation
by Andre Nathan 30 Dec '13

30 Dec '13

Hello Let's say I'm facing a DDoS attack against one of my IP addresses. The attack is against a single IP, but it's flooding my network and taking it dow, so I'd like to blackhole it in my Bird router to mitigate the effects of the attack. Is this configuration enough to blackhole an address, say a.b.c.d? protocol static blackhole { table master; route a.b.c.d/32 blackhole; import all; } Thank you, Andre

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System requirements for BIRD
by Tigran Zakoyan 23 Dec '13

23 Dec '13

Dear collegues, I failed to find anything regarding the subject. Could somebody give some prompts on it? Particularily, is a config like CPU: intel ATOM D2550 Dual Core 1.86G 4 thread DDR3 4Gb (or 8Gb) suitable for a 3 GBIT interface BGP router with 2 full view uplinks? I am intending to use something like this: http://www.aliexpress.com/item/2013-New-fanless-network-1U-server-with-inte… Thanks to the dev team, and kind regards. Tigran Zakoyan.

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netflix uses bird
by Allan Pinto 22 Dec '13

22 Dec '13

https://signup.netflix.com/openconnect/software got it off hacker news, thats cloudflare and netflix now -- Thanx and regd's. Allan. http://tamahatta.com

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bgppath.filter question - modifying AS_PATH
by Javor Kliachev 18 Dec '13

18 Dec '13

Hello, We use BIRD as Route Server. According your documentation we would like to know how given AS_PATH can be modified for example: To delete ALL ASNs from given AS_PATH except one AS predefined in int set. Here is my example config: function filter_bgp_as_path() int set remove_as; { remove_as = [ 50 ]; bgp_path.filter(remove_as); return true; } table T65533 protocol pipe P65533 from PIPES { description "TEST"; peer table T65533; export all; } protocol bgp R65533x1 from PEERS { source address 10.0.0.200; description "TEST"; neighbor 10.79.2.2 as 65533; multihop; import none; export where filter_bgp_as_path(); table T65533; passive off; } After running "birdc configure" I see in bird.log to return the following error: 17-12-2013 14:44:47 <ERR> filters, line 8: Can't add/delete to non-(e)clist 17-12-2013 14:44:47 <ERR> filters, line 8: Can't add/delete to non-(e)clist 17-12-2013 14:44:47 <ERR> filters, line 8: Can't add/delete to non-(e)clist Could you please point me in the right direction ? Is it possible at all to modify AS_PATH attribute? Thanks in advance! Best~ -- --- Find out about our new Cloud service - Cloudware.bg <http://cloudware.bg/?utm_source=email&utm_medium=signature&utm_content=link…> Access anywhere. Manage it yourself. Pay as you go. ------------------------------------------------------------------------ *Javor Kliachev* IP Engineer Neterra Ltd. Telephone: +359 2 975 16 16 Fax: +359 2 975 34 36 www.neterra.net <http://www.neterra.net>

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Multiple OSPF adjacencies on same interface...
by Kristoffer Egefelt 16 Dec '13

16 Dec '13

Hi, Is this not supported? I’m trying to use a bonded interface on linux to connect to two routers, one router on each physical link, each with a /31 subnet. Only one of the routers (Force10 S4810) forms adjacency with the linux host (whichever comes first), the other gets stuck in EXSTART until I shut/no shut the link, then Bird creates adjacency with both routers. Quagga works as expected, but I’d rather use Bird due to better filtering etc. Any ideas ? Thanks Regards Kristoffer

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