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-rw-r--r--doc/bird.sgml46
1 files changed, 28 insertions, 18 deletions
diff --git a/doc/bird.sgml b/doc/bird.sgml
index a6fa4df..82ff630 100644
--- a/doc/bird.sgml
+++ b/doc/bird.sgml
@@ -272,7 +272,7 @@ protocol rip {
listen to IPv6 connections only. This is needed if you want to
run both bird and bird6 on the same port.
- <tag>timeformat route|protocol|base|log "<m/format1/" [<m/limit> "<m/format2/"]</tag>
+ <tag>timeformat route|protocol|base|log "<m/format1/" [<m/limit/ "<m/format2/"]</tag>
This option allows to specify a format of date/time used by
BIRD. The first argument specifies for which purpose such
format is used. <cf/route/ is a format used in 'show route'
@@ -280,8 +280,8 @@ protocol rip {
command output, <cf/base/ is used for other commands and
<cf/log/ is used in a log file.
- "<m/format1/" is a format string using <i/strftime(3)/
- notation (see <i/man strftime/ for details). <m/limit> and
+ "<m/format1/" is a format string using <it/strftime(3)/
+ notation (see <it/man strftime/ for details). <m/limit> and
"<m/format2/" allow to specify the second format string for
times in past deeper than <m/limit/ seconds. There are two
shorthands: <cf/iso long/ is a ISO 8601 date/time format
@@ -976,10 +976,13 @@ This allows to set routing policy and all the other parameters differently
for each neighbor using the following configuration parameters:
<descrip>
- <tag>local as <m/number/</tag> Define which AS we are part of. (Note that
- contrary to other IP routers, BIRD is able to act as a router located
- in multiple AS'es simultaneously, but in such cases you need to tweak
- the BGP paths manually in the filters to get consistent behavior.)
+ <tag>local <m/[ip]/] as <m/number/</tag> Define which AS we
+ are part of. (Note that contrary to other IP routers, BIRD is
+ able to act as a router located in multiple AS'es
+ simultaneously, but in such cases you need to tweak the BGP
+ paths manually in the filters to get consistent behavior.)
+ Optional <cf/ip/ argument specifies a source address,
+ equivalent to the <cf/source address/ option (see below).
This parameter is mandatory.
<tag>neighbor <m/ip/ as <m/number/</tag> Define neighboring router
@@ -988,16 +991,27 @@ for each neighbor using the following configuration parameters:
of your router's interfaces. In case the neighbor is in the same AS
as we are, we automatically switch to iBGP. This parameter is mandatory.
- <tag>multihop <m/number/ via <m/ip/</tag> Configure multihop BGP to a
- neighbor which is connected at most <m/number/ hops far and to which
- we should route via our direct neighbor with address <m/ip/.
+ <tag>multihop <m/[number]/]</tag> Configure multihop BGP
+ session to a neighbor that isn't directly connected.
+ Accurately, this option should be used if the configured
+ neighbor IP address does not match with any local network
+ subnets. Such IP address have to be reachable through system
+ routing table. For multihop BGP it is recommended to
+ explicitly configure <cf/source address/ to have it
+ stable. Optional <cf/number/ argument can be used to limit TTL
+ (the number of hops).
Default: switched off.
+ <tag>source address <m/ip/</tag> Define local address we
+ should use for next hop calculation and as a source address
+ for the BGP session. Default: the address of the local
+ end of the interface our neighbor is connected to.
+
<tag>next hop self</tag> Avoid calculation of the Next Hop
- attribute and always advertise our own source address (see
- below) as a next hop. This needs to be used only occasionally
- to circumvent misconfigurations of other routers.
- Default: disabled.
+ attribute and always advertise our own source address as a
+ next hop. This needs to be used only occasionally to
+ circumvent misconfigurations of other routers. Default:
+ disabled.
<tag>missing lladdr self|drop|ignore</tag>Next Hop attribute
in BGP-IPv6 sometimes contains just the global IPv6 address,
@@ -1015,10 +1029,6 @@ for each neighbor using the following configuration parameters:
that case default is <cf/drop/, because route servers usually
does not forward packets ifselves.
- <tag>source address <m/ip/</tag> Define local address we should use
- for next hop calculation. Default: the address of the local end
- of the interface our neighbor is connected to.
-
<tag>password <m/string/</tag> Use this password for MD5 authentication
of BGP sessions. Default: no authentication. Password has to be set by
external utility (e.g. setkey(8)) on BSD systems.