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Ondrej Zajicek 2015-07-18 19:05:11 +02:00
parent 06e0d1b692
commit 6683d42d5b
1 changed files with 22 additions and 3 deletions
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doc/bird.sgml
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@ -1707,7 +1707,11 @@ using the following configuration parameters:
<cf/bgp_next_hop/ is used if it is directly reachable, otherwise the <cf/bgp_next_hop/ is used if it is directly reachable, otherwise the
neighbor IP address is used. Recursive mode means that the gateway is neighbor IP address is used. Recursive mode means that the gateway is
computed by an IGP routing table lookup for the IP address from computed by an IGP routing table lookup for the IP address from
<cf/bgp_next_hop/. Recursive mode is the behavior specified by the BGP <cf/bgp_next_hop/. Note that there is just one level of indirection in
recursive mode - the route obtained by the lookup must not be recursive
itself, to prevent mutually recursive routes.
Recursive mode is the behavior specified by the BGP
standard. Direct mode is simpler, does not require any routes in a standard. Direct mode is simpler, does not require any routes in a
routing table, and was used in older versions of BIRD, but does not routing table, and was used in older versions of BIRD, but does not
handle well nontrivial iBGP setups and multihop. Recursive mode is handle well nontrivial iBGP setups and multihop. Recursive mode is
@ -2081,7 +2085,6 @@ interfaces to be defined for them to work with.
<p><descrip> <p><descrip>
<tag>scan time <m/number/</tag> <tag>scan time <m/number/</tag>
Time in seconds between two scans of the network interface list. On Time in seconds between two scans of the network interface list. On
systems where we are notified about interface status changes systems where we are notified about interface status changes
asynchronously (such as newer versions of Linux), we need to scan the asynchronously (such as newer versions of Linux), we need to scan the
@ -2266,6 +2269,20 @@ these attributes:
The realm of the route. Can be used for traffic classification. The realm of the route. Can be used for traffic classification.
</descrip> </descrip>
<p>In Linux, there is also a plenty of obscure route attributes mostly focused
on tuning TCP performance of local connections. BIRD supports most of these
attributes, see Linux or iproute2 documentation for their meaning. Attributes
<cf/krt_lock_*/ and <cf/krt_feature_*/ have type bool, others have type int.
Supported attributes are:
<cf/krt_mtu/, <cf/krt_lock_mtu/, <cf/krt_window/, <cf/krt_lock_window/,
<cf/krt_rtt/, <cf/krt_lock_rtt/, <cf/krt_rttvar/, <cf/krt_lock_rttvar/,
<cf/krt_sstresh/, <cf/krt_lock_sstresh/, <cf/krt_cwnd/, <cf/krt_lock_cwnd/,
<cf/krt_advmss/, <cf/krt_lock_advmss/, <cf/krt_reordering/, <cf/krt_lock_reordering/,
<cf/krt_hoplimit/, <cf/krt_lock_hoplimit/, <cf/krt_rto_min/, <cf/krt_lock_rto_min/,
<cf/krt_initcwnd/, <cf/krt_initrwnd/, <cf/krt_quickack/,
<cf/krt_feature_ecn/, <cf/krt_feature_allfrag/
<sect1>Example <sect1>Example
<p>A simple configuration can look this way: <p>A simple configuration can look this way:
@ -3394,7 +3411,9 @@ of the protocol contains mainly a list of static routes:
<descrip> <descrip>
<tag>route <m/prefix/ via <m/ip/</tag> <tag>route <m/prefix/ via <m/ip/</tag>
Static route through a neighboring router. Static route through a neighboring router. For link-local next hops,
interface can be specified as a part of the address (e.g.,
<cf/via fe80::1234%eth0/).
<tag>route <m/prefix/ multipath via <m/ip/ [weight <m/num/] [via ...]</tag> <tag>route <m/prefix/ multipath via <m/ip/ [weight <m/num/] [via ...]</tag>
Static multipath route. Contains several nexthops (gateways), possibly Static multipath route. Contains several nexthops (gateways), possibly