BGP: Promiscuous ASN mode

Allow to specify just 'internal' or 'external' for remote neighbor
instead of specific ASN. In the second case that means BGP peers with
any non-local ASNs are accepted.

1 files changed, 7 insertions, 4 deletions

diff --git a/doc/bird.sgml b/doc/bird.sgml
index 52c9d6fd..9675caf0 100644
--- a/doc/bird.sgml
+++ b/doc/bird.sgml
@@ -2195,12 +2195,15 @@ using the following configuration parameters:
 	<cf/local 10.0.0.1; local as 65000;/ are valid). This parameter is
 	mandatory.
 
-	<tag><label id="bgp-neighbor">neighbor [<m/ip/] [port <m/number/] [as <m/number/]</tag>
+	<tag><label id="bgp-neighbor">neighbor [<m/ip/] [port <m/number/] [as <m/number/] [internal|external]</tag>
 	Define neighboring router this instance will be talking to and what AS
 	it is located in. In case the neighbor is in the same AS as we are, we
-	automatically switch to iBGP. Optionally, the remote port may also be
-	specified. Like <cf/local/ parameter, this parameter may also be used
-	multiple times with different sub-options. This parameter is mandatory.
+	automatically switch to IBGP. Alternatively, it is possible to specify
+	just <cf/internal/ or </cf/external/ instead of AS number, in that case
+	either local AS number, or any external AS number is accepted.
+	Optionally, the remote port may also be specified. Like <cf/local/
+	parameter, this parameter may also be used multiple times with different
+	sub-options. This parameter is mandatory.
 
 	<tag><label id="bgp-iface">interface <m/string/</tag>
 	Define interface we should use for link-local BGP IPv6 sessions.