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Donatas Abraitis 247a75d5c6 bgpd: Reset BGP session only if it was a real BFD DOWN event 
Without this patch we always see a double-reset, e.g.:

```
2024/11/04 12:42:43.010 BGP: [VQY9X-CQZKG] bgp_peer_bfd_update_source: address [0.0.0.0->172.18.0.3] to [172.18.0.2->172.18.0.3]
2024/11/04 12:42:43.010 BGP: [X8BD9-8RKN4] bgp_peer_bfd_update_source: interface none to eth0
2024/11/04 12:42:43.010 BFD: [MSVDW-Y8Z5Q] ptm-del-dest: deregister peer [mhop:no peer:172.18.0.3 local:0.0.0.0 vrf:default cbit:0x00 minimum-ttl:255]
2024/11/04 12:42:43.010 BFD: [NYF5K-SE3NS] ptm-del-session: [mhop:no peer:172.18.0.3 local:0.0.0.0 vrf:default] refcount=0
2024/11/04 12:42:43.010 BFD: [NW21R-MRYNT] session-delete: mhop:no peer:172.18.0.3 local:0.0.0.0 vrf:default
2024/11/04 12:42:43.010 BGP: [P3D3N-3277A] 172.18.0.3 [FSM] Timer (routeadv timer expire)
2024/11/04 12:42:43.010 BFD: [YA0Q5-C0BPV] control-packet: no session found [mhop:no peer:172.18.0.3 local:172.18.0.2 port:11]
2024/11/04 12:42:43.010 BFD: [MSVDW-Y8Z5Q] ptm-add-dest: register peer [mhop:no peer:172.18.0.3 local:172.18.0.2 vrf:default cbit:0x00 minimum-ttl:255]
2024/11/04 12:42:43.011 BFD: [PSB4R-8T1TJ] session-new: mhop:no peer:172.18.0.3 local:172.18.0.2 vrf:default ifname:eth0
2024/11/04 12:42:43.011 BGP: [Q4BCV-6FHZ5] zclient_bfd_session_update: 172.18.0.2/32 -> 172.18.0.3/32 (interface eth0) VRF default(0) (CPI bit no): Down
2024/11/04 12:42:43.011 BGP: [MKVHZ-7MS3V] bfd_session_status_update: neighbor 172.18.0.3 vrf default(0) bfd state Up -> Down
2024/11/04 12:42:43.011 BGP: [HZN6M-XRM1G] %NOTIFICATION: sent to neighbor 172.18.0.3 6/10 (Cease/BFD Down) 0 bytes
2024/11/04 12:42:43.011 BGP: [QFMSE-NPSNN] zclient_bfd_session_update:   sessions updated: 1
2024/11/04 12:42:43.011 BGP: [ZWCSR-M7FG9] 172.18.0.3 [FSM] BGP_Stop (Established->Clearing), fd 22
```

Reset is due to the source address change.

With this patch, we reset the session only if it's a _REAL_ BFD down event, which
means we trigger session reset if BFD session is established earlier than BGP.

Signed-off-by: Donatas Abraitis <donatas@opensourcerouting.org>
2024-11-05 20:07:30 +02:00
.github ci: do apt-get update before installing required modules 2024-06-08 17:29:19 -04:00
alpine docker: Set ABUILD_APK_INDEX_OPTS for frr build 2024-06-14 16:33:32 +03:00
babeld babeld: changes for code maintainability 2024-09-06 07:02:51 +05:30
bfdd bfdd, doc, yang: change bfd timer and multiplier values 2024-10-08 10:32:16 +02:00
bgpd bgpd: Reset BGP session only if it was a real BFD DOWN event 2024-11-05 20:07:30 +02:00
debian debian, redhat: frr dev 10.3 package housekeeping 2024-10-10 15:44:30 -05:00
doc doc: Fix misspelling SRv6 formats command 2024-11-03 08:00:04 +01:00
docker docker: Set ABUILD_APK_INDEX_OPTS for libyang 2024-06-14 11:37:23 +03:00
eigrpd *: Modify agentx to be allowed to be called 2024-05-10 10:16:29 -04:00
fpm fpm: Allow max fpm message size to float based on ecmp 2024-10-11 09:37:37 -04:00
gdb lib: add simplified native msg support 2023-12-26 08:34:56 -05:00
grpc build: throw in a few more XREF_SETUP 2024-05-09 18:02:49 +02:00
include build: include our own copy of if.h and dependencies 2024-04-26 17:11:53 +02:00
isisd Merge pull request #17190 from baozhen-H3C/202410180176 2024-10-29 10:08:28 -04:00
ldpd ldpd: free previous config if it wasn't applied 2024-10-16 13:30:25 +02:00
lib Merge pull request #17312 from donaldsharp/remove_in6addr_cmp 2024-11-01 18:06:04 +02:00
m4 build: add recursion limit for AX_RECURSIVE_EVAL 2024-01-27 19:01:19 +01:00
mgmtd lib: add flag to have libyang load internal ietf-yang-library module 2024-10-07 03:32:44 +00:00
mlag build: throw in a few more XREF_SETUP 2024-05-09 18:02:49 +02:00
nhrpd Merge pull request #16788 from LabNConsulting/jmuthii/nhrpd-retry-resolution 2024-09-24 11:07:21 -05:00
ospf6d Merge pull request #16908 from donaldsharp/ospf6_snmp_special 2024-09-24 13:39:57 -05:00
ospfclient tools, ospfclient: add a config option to skip installing python scripts 2024-08-22 13:46:30 -05:00
ospfd Merge pull request #17194 from LabNConsulting/aceelindem/ospf-ls-refresh-interval-fix 2024-11-01 11:37:32 -04:00
pathd *: Create termtable specific temp memory 2024-09-01 13:07:46 -04:00
pbrd lib: common debug status output 2024-08-27 09:53:02 -04:00
pceplib Merge pull request #15215 from donaldsharp/pceplib_fixup 2024-01-25 09:59:59 +02:00
pimd Merge pull request #17216 from Jafaral/fix-bsr 2024-10-27 21:11:23 +02:00
pkgsrc build: homologize path handling 2024-01-27 19:02:52 +01:00
python vtysh: fix find and list commands 2024-10-22 20:43:59 +02:00
qpb *: add XREF_SETUP() to libraries and utilites 2024-05-02 23:03:08 +02:00
redhat debian, redhat: frr dev 10.3 package housekeeping 2024-10-10 15:44:30 -05:00
ripd ripd: fix show run output for distribute-list 2024-08-08 01:25:02 +03:00
ripngd ripngd: adjust header for display command 2024-07-05 09:31:39 +08:00
sharpd sharpd: Allow sharpd to watch nexthops in the mrib 2024-10-28 14:10:06 -04:00
snapcraft bfdd: remove control socket obsolete code 2024-07-25 10:37:11 -03:00
staticd *: Fix up improper handling of nexthops for nexthop tracking 2024-10-15 11:57:23 -04:00
tests tests: Remove unnecessary fields from expected JSON 2024-11-01 16:46:41 +00:00
tools tools/gcc-plugins: don't crash on array parameters 2024-10-15 13:35:24 +02:00
vrrpd vrrpd: iterate over all ancillary messages 2024-10-07 13:05:10 -03:00
vtysh vtysh: make clang-SA happy about reusing stdin 2024-10-16 13:30:25 +02:00
watchfrr build: homologize path handling 2024-01-27 19:02:52 +01:00
yang isisd: fix change flex-algorithm number from uint32 to uint8 2024-10-25 22:17:29 +02:00
zebra Merge pull request #16960 from donaldsharp/zebra_nhg_startup_issue 2024-11-04 11:49:30 -05:00
.clang-format *: Modify clang-format column limit to 100 2024-09-26 09:58:32 -04:00
.dockerignore docker: Make docker image on CentOS 7 2019-11-26 19:29:30 +00:00
.flake8 style: add format checker config that matches FRR style standards 2023-04-18 05:18:26 -04:00
.git-blame-ignore-revs tools: Add black formatting commit to .git-blame-ignore-revs 2024-04-28 12:50:51 +03:00
.gitignore python: add tool to expand typesafe definitions 2024-04-29 17:37:49 +02:00
.isort.cfg style: add format checker config that matches FRR style standards 2023-04-18 05:18:26 -04:00
.pylintrc style: add format checker config that matches FRR style standards 2023-04-18 05:18:26 -04:00
.travis.yml lib: libyang2 add missed conversion 2021-05-17 22:13:59 -04:00
bootstrap.sh build: turn on automake warnings (& symlinks) 2021-04-21 15:42:37 +02:00
buildtest.sh build: update packaging & docs for dir changes 2024-01-27 19:01:19 +01:00
config.version.in build: carry --with-pkg-extra-version into tarballs 2018-10-24 15:11:50 +02:00
configure.ac build: FRR 10.3 development version 2024-10-08 13:06:40 -05:00
COPYING *: sort out & explain licenses used in FRR 2023-02-09 12:46:13 +01:00
Makefile.am build: homologize path handling 2024-01-27 19:02:52 +01:00
README.md doc: Fix the link that points to Slack invitation in README 2022-03-24 13:13:37 +02:00
stamp-h.in Initial revision 2002-12-13 20:15:29 +00:00
version.h build: make builddir include path consistent 2021-04-21 15:42:33 +02:00

README.md

Icon

FRRouting

FRR is free software that implements and manages various IPv4 and IPv6 routing protocols. It runs on nearly all distributions of Linux and BSD and supports all modern CPU architectures.

FRR currently supports the following protocols:

  • BGP
  • OSPFv2
  • OSPFv3
  • RIPv1
  • RIPv2
  • RIPng
  • IS-IS
  • PIM-SM/MSDP
  • LDP
  • BFD
  • Babel
  • PBR
  • OpenFabric
  • VRRP
  • EIGRP (alpha)
  • NHRP (alpha)

Installation & Use

For source tarballs, see the releases page.

For Debian and its derivatives, use the APT repository at https://deb.frrouting.org/.

Instructions on building and installing from source for supported platforms may be found in the developer docs.

Once installed, please refer to the user guide for instructions on use.

Community

The FRRouting email list server is located here and offers the following public lists:

Topic List
Development dev@lists.frrouting.org
Users & Operators frog@lists.frrouting.org
Announcements announce@lists.frrouting.org

For chat, we currently use Slack. You can join by clicking the "Slack" link under the Participate section of our website.

Contributing

FRR maintains developer's documentation which contains the project workflow and expectations for contributors. Some technical documentation on project internals is also available.

We welcome and appreciate all contributions, no matter how small!

Security

To report security issues, please use our security mailing list:

security [at] lists.frrouting.org