bgpd: Add new configuration cli for eBGP and iBGP multipath.
There is support to configure this for each (AFI,SAFI), but
currently this configuration is only present for IPv4 unicast:
maximum-paths [ibgp] <1-255>
no maximum-paths [ibgp] [<1-255>]
* bgpd/Makefile.am
* Add bgp_mpath.h and bgp_mpath.c to build
* bgpd/bgp_mpath.h
* New file for bgp multipath declarations
* define BGP_DEFAULT_MAXPATHS
* bgpd/bgp_mpath.c
* bgp_maximum_paths_set(): Configure maximum paths for the given
afi, safi and bgp instance
* bgp_maximum_paths_unset(): Return maximum paths configuration to
the default setting for the given afi, safi and bgp instance
* bgpd/bgp_vty.c
* Define command strings for above CLI
* bgp_config_write_maxpaths(): Outputs configuration for the given
afi, safi and bgp instance
* Install command elements for IPv4 unicast
* bgpd/bgp_zebra.h
* bgp_config_write_maxpaths(): External declaration
* bgpd/bgpd.c
* bgp_create(): Initialize bgp instance to default maximum paths setting
* bgp_config_write_family(): Output maximum paths configuration
for the given address family
* bgp_config_write(): Output maximum paths configuration for
IPv4 unicast address family
* bgpd/bgpd.h
* struct bgp: Add storage for maximum paths configuration for
each afi, safi
diff --git a/bgpd/bgp_vty.c b/bgpd/bgp_vty.c
index e7e7dba..2c44efc 100644
--- a/bgpd/bgp_vty.c
+++ b/bgpd/bgp_vty.c
@@ -48,6 +48,7 @@
#include "bgpd/bgp_zebra.h"
#include "bgpd/bgp_table.h"
#include "bgpd/bgp_vty.h"
+#include "bgpd/bgp_mpath.h"
extern struct in_addr router_id_zebra;
@@ -650,6 +651,149 @@
return CMD_SUCCESS;
}
+/* Maximum-paths configuration */
+DEFUN (bgp_maxpaths,
+ bgp_maxpaths_cmd,
+ "maximum-paths <1-255>",
+ "Forward packets over multiple paths\n"
+ "Number of paths\n")
+{
+ struct bgp *bgp;
+ u_int16_t maxpaths;
+ int ret;
+
+ bgp = vty->index;
+
+ VTY_GET_INTEGER_RANGE ("maximum-paths", maxpaths, argv[0], 1, 255);
+
+ ret = bgp_maximum_paths_set (bgp, bgp_node_afi (vty), bgp_node_safi(vty),
+ BGP_PEER_EBGP, maxpaths);
+ if (ret < 0)
+ {
+ vty_out (vty,
+ "%% Failed to set maximum-paths %u for afi %u, safi %u%s",
+ maxpaths, bgp_node_afi (vty), bgp_node_safi(vty), VTY_NEWLINE);
+ return CMD_WARNING;
+ }
+
+ return CMD_SUCCESS;
+}
+
+DEFUN (bgp_maxpaths_ibgp,
+ bgp_maxpaths_ibgp_cmd,
+ "maximum-paths ibgp <1-255>",
+ "Forward packets over multiple paths\n"
+ "iBGP-multipath\n"
+ "Number of paths\n")
+{
+ struct bgp *bgp;
+ u_int16_t maxpaths;
+ int ret;
+
+ bgp = vty->index;
+
+ VTY_GET_INTEGER_RANGE ("maximum-paths", maxpaths, argv[0], 1, 255);
+
+ ret = bgp_maximum_paths_set (bgp, bgp_node_afi (vty), bgp_node_safi(vty),
+ BGP_PEER_IBGP, maxpaths);
+ if (ret < 0)
+ {
+ vty_out (vty,
+ "%% Failed to set maximum-paths ibgp %u for afi %u, safi %u%s",
+ maxpaths, bgp_node_afi (vty), bgp_node_safi(vty), VTY_NEWLINE);
+ return CMD_WARNING;
+ }
+
+ return CMD_SUCCESS;
+}
+
+DEFUN (no_bgp_maxpaths,
+ no_bgp_maxpaths_cmd,
+ "no maximum-paths",
+ NO_STR
+ "Forward packets over multiple paths\n"
+ "Number of paths\n")
+{
+ struct bgp *bgp;
+ int ret;
+
+ bgp = vty->index;
+
+ ret = bgp_maximum_paths_unset (bgp, bgp_node_afi (vty), bgp_node_safi(vty),
+ BGP_PEER_EBGP);
+ if (ret < 0)
+ {
+ vty_out (vty,
+ "%% Failed to unset maximum-paths for afi %u, safi %u%s",
+ bgp_node_afi (vty), bgp_node_safi(vty), VTY_NEWLINE);
+ return CMD_WARNING;
+ }
+
+ return CMD_SUCCESS;
+}
+
+ALIAS (no_bgp_maxpaths,
+ no_bgp_maxpaths_arg_cmd,
+ "no maximum-paths <1-255>",
+ NO_STR
+ "Forward packets over multiple paths\n"
+ "Number of paths\n")
+
+DEFUN (no_bgp_maxpaths_ibgp,
+ no_bgp_maxpaths_ibgp_cmd,
+ "no maximum-paths ibgp",
+ NO_STR
+ "Forward packets over multiple paths\n"
+ "iBGP-multipath\n"
+ "Number of paths\n")
+{
+ struct bgp *bgp;
+ int ret;
+
+ bgp = vty->index;
+
+ ret = bgp_maximum_paths_unset (bgp, bgp_node_afi (vty), bgp_node_safi(vty),
+ BGP_PEER_IBGP);
+ if (ret < 0)
+ {
+ vty_out (vty,
+ "%% Failed to unset maximum-paths ibgp for afi %u, safi %u%s",
+ bgp_node_afi (vty), bgp_node_safi(vty), VTY_NEWLINE);
+ return CMD_WARNING;
+ }
+
+ return CMD_SUCCESS;
+}
+
+ALIAS (no_bgp_maxpaths_ibgp,
+ no_bgp_maxpaths_ibgp_arg_cmd,
+ "no maximum-paths ibgp <1-255>",
+ NO_STR
+ "Forward packets over multiple paths\n"
+ "iBGP-multipath\n"
+ "Number of paths\n")
+
+int
+bgp_config_write_maxpaths (struct vty *vty, struct bgp *bgp, afi_t afi,
+ safi_t safi, int *write)
+{
+ if (bgp->maxpaths[afi][safi].maxpaths_ebgp != BGP_DEFAULT_MAXPATHS)
+ {
+ bgp_config_write_family_header (vty, afi, safi, write);
+ vty_out (vty, " maximum-paths %d%s",
+ bgp->maxpaths[afi][safi].maxpaths_ebgp, VTY_NEWLINE);
+ }
+
+ if (bgp->maxpaths[afi][safi].maxpaths_ibgp != BGP_DEFAULT_MAXPATHS)
+ {
+ bgp_config_write_family_header (vty, afi, safi, write);
+ vty_out (vty, " maximum-paths ibgp %d%s",
+ bgp->maxpaths[afi][safi].maxpaths_ibgp, VTY_NEWLINE);
+ }
+
+ return 0;
+}
+
/* BGP timers. */
DEFUN (bgp_timers,
@@ -9062,6 +9206,20 @@
install_element (BGP_NODE, &bgp_confederation_peers_cmd);
install_element (BGP_NODE, &no_bgp_confederation_peers_cmd);
+ /* "maximum-paths" commands. */
+ install_element (BGP_NODE, &bgp_maxpaths_cmd);
+ install_element (BGP_NODE, &no_bgp_maxpaths_cmd);
+ install_element (BGP_NODE, &no_bgp_maxpaths_arg_cmd);
+ install_element (BGP_IPV4_NODE, &bgp_maxpaths_cmd);
+ install_element (BGP_IPV4_NODE, &no_bgp_maxpaths_cmd);
+ install_element (BGP_IPV4_NODE, &no_bgp_maxpaths_arg_cmd);
+ install_element (BGP_NODE, &bgp_maxpaths_ibgp_cmd);
+ install_element (BGP_NODE, &no_bgp_maxpaths_ibgp_cmd);
+ install_element (BGP_NODE, &no_bgp_maxpaths_ibgp_arg_cmd);
+ install_element (BGP_IPV4_NODE, &bgp_maxpaths_ibgp_cmd);
+ install_element (BGP_IPV4_NODE, &no_bgp_maxpaths_ibgp_cmd);
+ install_element (BGP_IPV4_NODE, &no_bgp_maxpaths_ibgp_arg_cmd);
+
/* "timers bgp" commands. */
install_element (BGP_NODE, &bgp_timers_cmd);
install_element (BGP_NODE, &no_bgp_timers_cmd);