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Donald Sharp 82a843fa3d bgpd: allow bestpath to handle mutliple locally-originated paths 
Current code in bgp bestpath selection would accept the newest
locally originated path as the best path.  Making the selection
non-deterministic.  Modify the code to always come to the
same bestpath conclusion when you have multiple locally originated
paths in bestpath selection.

Before:

eva# conf
eva(config)# router bgp 323
eva(config-router)# address-family ipv4 uni
eva(config-router-af)# redistribute connected
eva(config-router-af)# network 192.168.161.0/24
eva(config-router-af)# do show bgp ipv4 uni 192.168.161.0
BGP routing table entry for 192.168.161.0/24
Paths: (2 available, best #1, table default)
  Not advertised to any peer
  Local
    0.0.0.0(eva) from 0.0.0.0 (192.168.161.245)
      Origin IGP, metric 0, weight 32768, valid, sourced, local, bestpath-from-AS Local, best (Origin)
      Last update: Wed Sep 16 15:03:03 2020
  Local
    0.0.0.0(eva) from 0.0.0.0 (192.168.161.245)
      Origin incomplete, metric 0, weight 32768, valid, sourced
      Last update: Wed Sep 16 15:02:52 2020
eva(config-router-af)# no redistribute connected
eva(config-router-af)# do show bgp ipv4 uni 192.168.161.0
BGP routing table entry for 192.168.161.0/24
Paths: (1 available, best #1, table default)
  Not advertised to any peer
  Local
    0.0.0.0(eva) from 0.0.0.0 (192.168.161.245)
      Origin IGP, metric 0, weight 32768, valid, sourced, local, bestpath-from-AS Local, best (First path received)
      Last update: Wed Sep 16 15:03:03 2020
eva(config-router-af)#  redistribute connected
eva(config-router-af)# do show bgp ipv4 uni 192.168.161.0
BGP routing table entry for 192.168.161.0/24
Paths: (2 available, best #2, table default)
  Not advertised to any peer
  Local
    0.0.0.0(eva) from 0.0.0.0 (192.168.161.245)
      Origin incomplete, metric 0, weight 32768, valid, sourced
      Last update: Wed Sep 16 15:03:32 2020
  Local
    0.0.0.0(eva) from 0.0.0.0 (192.168.161.245)
      Origin IGP, metric 0, weight 32768, valid, sourced, local, bestpath-from-AS Local, best (Origin)
      Last update: Wed Sep 16 15:03:03 2020
eva(config-router-af)#

Notice the route choosen depends on order received

Fixed behavior:

eva# conf
eva(config)# router bgp 323
eva(config-router)# address-family ipv4 uni
eva(config-router-af)# redistribute connected
eva(config-router-af)# network 192.168.161.0/24
eva(config-router-af)# do show bgp ipv4 uni 192.168.161.0
BGP routing table entry for 192.168.161.0/24
Paths: (2 available, best #1, table default)
  Not advertised to any peer
  Local
    0.0.0.0(eva) from 0.0.0.0 (192.168.161.245)
      Origin IGP, metric 0, weight 32768, valid, sourced, local, bestpath-from-AS Local, best (Origin)
      Last update: Wed Sep 16 15:03:03 2020
  Local
    0.0.0.0(eva) from 0.0.0.0 (192.168.161.245)
      Origin incomplete, metric 0, weight 32768, valid, sourced
      Last update: Wed Sep 16 15:02:52 2020
eva(config-router-af)# no redistribute connected
eva(config-router-af)# do show bgp ipv4 uni 192.168.161.0
BGP routing table entry for 192.168.161.0/24
Paths: (1 available, best #1, table default)
  Not advertised to any peer
  Local
    0.0.0.0(eva) from 0.0.0.0 (192.168.161.245)
      Origin IGP, metric 0, weight 32768, valid, sourced, local, bestpath-from-AS Local, best (First path received)
      Last update: Wed Sep 16 15:03:03 2020
eva(config-router-af)#  redistribute connected
eva(config-router-af)# do show bgp ipv4 uni 192.168.161.0
BGP routing table entry for 192.168.161.0/24
Paths: (2 available, best #2, table default)
  Not advertised to any peer
  Local
    0.0.0.0(eva) from 0.0.0.0 (192.168.161.245)
      Origin incomplete, metric 0, weight 32768, valid, sourced
      Last update: Wed Sep 16 15:03:32 2020
  Local
    0.0.0.0(eva) from 0.0.0.0 (192.168.161.245)
      Origin IGP, metric 0, weight 32768, valid, sourced, local, bestpath-from-AS Local, best (Origin)
      Last update: Wed Sep 16 15:03:03 2020
eva(config-router-af)#

Ticket: CM-31490
Found-by: Trey Aspelund <taspelund@nvidia.com>
Signed-off-by: Donald Sharp <sharpd@nvidia.com>
2020-10-06 10:34:32 -04:00
.github github: Add lost chapter witch issue template 2020-08-25 21:44:13 +03:00
alpine alpine: enable multi-arch builds 2020-06-24 16:33:18 -04:00
babeld vtysh: dynamically generate the list of daemons for commands 2020-10-02 15:06:27 +03:00
bfdd vtysh: dynamically generate the list of daemons for commands 2020-10-02 15:06:27 +03:00
bgpd bgpd: allow bestpath to handle mutliple locally-originated paths 2020-10-06 10:34:32 -04:00
debian Lower the debhelper depends for Debian Jessie and Ubuntu Xenial 2020-09-26 12:14:32 +02:00
doc doc: MSDP SA forwarding 2020-10-06 08:11:24 -04:00
docker docker: don't fail on chown /etc/frr 2020-06-10 00:20:04 -04:00
eigrpd vtysh: dynamically generate the list of daemons for commands 2020-10-02 15:06:27 +03:00
fpm *: Replace sizeof something to sizeof(something) 2020-03-08 21:44:53 +02:00
gdb bgpd: Convert binfo to path 2018-10-09 14:26:30 -04:00
grpc lib: don't ignore error messages generated during the commit apply phase 2020-08-14 21:37:14 -03:00
include Merge pull request #7155 from donaldsharp/TRAP 2020-09-23 16:06:37 -04:00
isisd Merge pull request #7124 from volta-networks/fix_ldp_sync_isis_nb 2020-10-05 13:04:15 -03:00
ldpd vtysh: dynamically generate the list of daemons for commands 2020-10-02 15:06:27 +03:00
lib Merge pull request #7238 from sworleys/Nexthop-Same-First-Remove 2020-10-06 08:33:35 -04:00
m4 build: find all future minor versions of python3 2020-07-09 06:47:31 +02:00
mlag zebra: Do not build mlag protobuf support if version 3 is not avail 2019-12-15 09:37:51 -05:00
nhrpd vtysh: dynamically generate the list of daemons for commands 2020-10-02 15:06:27 +03:00
ospf6d vtysh: dynamically generate the list of daemons for commands 2020-10-02 15:06:27 +03:00
ospfclient *: Replace s_addr 0 => INADDR_ANY 2020-02-06 09:00:12 +02:00
ospfd Merge pull request #7228 from idryzhov/vtysh-dynamic-daemons 2020-10-02 18:07:31 -04:00
pbrd vtysh: dynamically generate the list of daemons for commands 2020-10-02 15:06:27 +03:00
pimd pimd: MSDP SA forwarding 2020-10-06 08:11:24 -04:00
pkgsrc *: cleanup .gitignore files 2018-09-08 21:30:42 +02:00
python python: Make FRR build compatible with python 2.7 and 3.x 2020-08-19 19:38:28 +02:00
qpb build: add LLVM bitcode targets 2020-05-05 14:39:12 +02:00
redhat build, yang: bump libyang minimum required version to 1.0.184 2020-08-07 14:07:46 -03:00
ripd vtysh: dynamically generate the list of daemons for commands 2020-10-02 15:06:27 +03:00
ripngd vtysh: dynamically generate the list of daemons for commands 2020-10-02 15:06:27 +03:00
sharpd vtysh: dynamically generate the list of daemons for commands 2020-10-02 15:06:27 +03:00
snapcraft snapcraft: Update libyang version 2020-09-10 09:13:36 -04:00
staticd Merge pull request #6882 from vishaldhingra/static 2020-10-02 23:52:53 -04:00
tests Merge pull request #6904 from chiragshah6/yang_nb6 2020-10-05 21:53:39 +05:30
tools tools: fix vtysh failure error handling 2020-09-17 15:53:42 -04:00
vrrpd vtysh: dynamically generate the list of daemons for commands 2020-10-02 15:06:27 +03:00
vtysh Merge pull request #7225 from idryzhov/vtysh-fix-domainname 2020-10-02 18:15:26 -04:00
watchfrr watchfrr: add (network) namespace support 2020-07-22 12:56:04 +02:00
yang bgpd: move router bgp nb callback 2020-10-03 11:25:38 -07:00
zebra Merge pull request #7214 from donaldsharp/more_vrf_usefulness 2020-10-06 08:29:45 -04:00
.clang-format clang-format: add FOREACH_SAFI to the ForEachMacros list 2020-08-03 12:18:24 -03:00
.dir-locals.el tools: fix emacs configuration file 2019-11-04 11:45:52 -03:00
.dockerignore docker: Make docker image on CentOS 7 2019-11-26 19:29:30 +00:00
.git-blame-ignore-revs *: Give git a clue about our whitespace changes 2020-08-18 07:54:07 -04:00
.gitignore python: add graphviz callgraphs 2020-05-05 14:39:12 +02:00
bootstrap.sh autoreconf -i 2007-02-06 19:28:28 +00:00
buildtest.sh config: switch a few references to say FRR 2017-07-12 11:25:33 -05:00
changelog-auto.in debian: cleanly split off from dist tarball 2019-02-19 21:31:18 +01:00
config.version.in build: carry --with-pkg-extra-version into tarballs 2018-10-24 15:11:50 +02:00
configure.ac vtysh: respect --disable-daemon configure flags 2020-09-29 14:03:57 +03:00
COPYING *: make consistent & update GPLv2 file headers 2017-05-15 16:37:41 +02:00
COPYING-LGPLv2.1 build: remove LGPL v2.0, add LGPL v2.1 2016-11-15 17:19:38 +09:00
Makefile.am vtysh: dynamically generate the list of daemons for commands 2020-10-02 15:06:27 +03:00
README.md doc: Update Documentation to note Solaris Unsupported status 2020-09-21 10:02:20 -04:00
stamp-h.in Initial revision 2002-12-13 20:15:29 +00:00

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