doc: add "enforce-first-as" to BGP doc

With the deprecation of the global "bgp enforce-first-as" command back in #2259 the newly introduced option to enable that setting on a specific peer was not documented. This commit adds the necessary documentation and states the command's default. Signed-off-by: Manuel Schweizer <[email protected]> (cherry picked from commit 3acc6ae)
FRRouting · Oct 19, 2023 · 8d2a5e5 · 8d2a5e5
1 parent dce179f
commit 8d2a5e5
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diff --git a/doc/user/bgp.rst b/doc/user/bgp.rst
@@ -1504,6 +1504,13 @@ Configuring Peers
    value is carried encoded as uint32. To enable backward compatibility we
    need to disable IEEE floating-point encoding option per-peer.
 
+.. clicmd:: neighbor PEER enforce-first-as
+
+   Discard updates received from the specified (eBGP) peer if the AS_PATH
+   attribute does not contain the PEER's ASN as the first AS_PATH segment.
+
+   Default: disabled.
+
 .. clicmd:: neighbor PEER extended-optional-parameters
 
    Force Extended Optional Parameters Length format to be used for OPEN messages.