This patch adds support for allowing BGP to create and bring up neighbor

sessions dynamically. The operator configures a range of neighbor addresses
to which peering is allowed. The ranges are configured as subnets and
multiple ranges are allowed. Each range is associated with a peer-group
so that additional parameters can be configured.

BGP neighbor sessions are dynamically created when connections are initiated
by remote neighbors whose addresses fall within a configured range. The
sessions are deleted when the BGP connection terminates.

A limit on the number of neighbors allowed from each range of addresses
can be specified.

IPv4 and IPv6 peering is supported. Over the peering, any of the address
families configured for the peer-group can be negotiated.

1 files changed, 9 insertions, 0 deletions

diff --git a/lib/command.h b/lib/command.h
index de09c7d947..9a54821173 100644
--- a/lib/command.h
+++ b/lib/command.h
@@ -508,6 +508,15 @@ struct cmd_token
 #define NEIGHBOR_ADDR_STR2 "Neighbor address\nNeighbor tag\n"
 #endif /* HAVE_IPV6 */
 
+/* Dynamic neighbor (listen range) configuration */
+#ifdef HAVE_IPV6
+#define LISTEN_RANGE_CMD      "bgp listen range (A.B.C.D/M|X:X::X:X/M) "
+#define LISTEN_RANGE_ADDR_STR "Neighbor address\nNeighbor IPv6 address\n"
+#else
+#define LISTEN_RANGE_CMD      "bgp listen range A.B.C.D/M "
+#define LISTEN_RANGE_ADDR_STR "Neighbor address\n"
+#endif /* HAVE_IPV6 */
+
 /* Prototypes. */
 extern void install_node (struct cmd_node *, int (*) (struct vty *));
 extern void install_default (enum node_type);