commit 2fdd455cfd1f758b7aa2e6c8e3d185098b93908c
author Pradosh Mohapatra <pmohapat@cumulusnetworks.com> Sat Sep 07 07:02:36 2013 +0000
committer David Lamparter <equinox@opensourcerouting.org> Thu May 15 19:15:22 2014 +0200
tree 3b2d28c7b389228cc6c1e3809660c4f7f22c3f18
parent d92a2f39b46f1990052d2db046b47edf7bb21ebb

bgpd: add 'bgp bestpath as-path multipath-relax'

Compute multipath in BGP based on AS_PATH hop count match. If the knob
is turned on, it is not required to have an exact match of AS_PATHs
(provided other multipath conditions are met, of course).

Signed-off-by: Pradosh Mohapatra <pmohapat at cumulusnetworks.com>
Reviewed-by: Dinesh G Dutt <ddutt at cumulusnetworks.com>
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>

bgpd/bgp_vty.c

diff --git a/bgpd/bgp_vty.c b/bgpd/bgp_vty.c
index 0f28894..bfa1f20 100644
--- a/bgpd/bgp_vty.c
+++ b/bgpd/bgp_vty.c
@@ -1160,6 +1160,38 @@
   return CMD_SUCCESS;
 }
 
+/* "bgp bestpath as-path multipath-relax" configuration.  */
+DEFUN (bgp_bestpath_aspath_multipath_relax,
+       bgp_bestpath_aspath_multipath_relax_cmd,
+       "bgp bestpath as-path multipath-relax",
+       "BGP specific commands\n"
+       "Change the default bestpath selection\n"
+       "AS-path attribute\n"
+       "Allow load sharing across routes that have different AS paths (but same length)\n")
+{
+  struct bgp *bgp;
+
+  bgp = vty->index;
+  bgp_flag_set (bgp, BGP_FLAG_ASPATH_MULTIPATH_RELAX);
+  return CMD_SUCCESS;
+}
+
+DEFUN (no_bgp_bestpath_aspath_multipath_relax,
+       no_bgp_bestpath_aspath_multipath_relax_cmd,
+       "no bgp bestpath as-path multipath-relax",
+       NO_STR
+       "BGP specific commands\n"
+       "Change the default bestpath selection\n"
+       "AS-path attribute\n"
+       "Allow load sharing across routes that have different AS paths (but same length)\n")
+{
+  struct bgp *bgp;
+
+  bgp = vty->index;
+  bgp_flag_unset (bgp, BGP_FLAG_ASPATH_MULTIPATH_RELAX);
+  return CMD_SUCCESS;
+}
+
 /* "bgp log-neighbor-changes" configuration.  */
 DEFUN (bgp_log_neighbor_changes,
        bgp_log_neighbor_changes_cmd,
@@ -9172,6 +9204,10 @@
   install_element (BGP_NODE, &bgp_bestpath_aspath_confed_cmd);
   install_element (BGP_NODE, &no_bgp_bestpath_aspath_confed_cmd);
 
+  /* "bgp bestpath as-path multipath-relax" commands */
+  install_element (BGP_NODE, &bgp_bestpath_aspath_multipath_relax_cmd);
+  install_element (BGP_NODE, &no_bgp_bestpath_aspath_multipath_relax_cmd);
+
   /* "bgp log-neighbor-changes" commands */
   install_element (BGP_NODE, &bgp_log_neighbor_changes_cmd);
   install_element (BGP_NODE, &no_bgp_log_neighbor_changes_cmd);