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Diffstat (limited to 'doc/bird.sgml')
| -rw-r--r-- | doc/bird.sgml | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/doc/bird.sgml b/doc/bird.sgml index 4024f137..20738be3 100644 --- a/doc/bird.sgml +++ b/doc/bird.sgml @@ -1618,7 +1618,7 @@ kernel table. <p>Because the kernel protocol is partially integrated with the connected routing table, there are two limitations - it is not possible to connect more kernel protocols to the same routing table -and changing route attributes (even the kernel ones) in an export +and changing route destination/gateway in an export filter of a kernel protocol does not work. Both limitations can be overcome using another routing table and the pipe protocol. @@ -1653,6 +1653,16 @@ are translated to appropriate system (and OS-specific) route attributes. We support these attributes: <descrip> + <tag>int <cf/krt_source/</tag> The original source of the imported + kernel route. The value is system-dependent. On Linux, it is + a value of the protocol field of the route. See + /etc/iproute2/rt_protos for common values. On BSD, it is + based on STATIC and PROTOx flags. The attribute is read-only. + + <tag>int <cf/krt_metric/</tag> The kernel metric of + the route. When multiple same routes are in a kernel routing + table, the Linux kernel chooses one with lower metric. + <tag>ip <cf/krt_prefsrc/</tag> (Linux) The preferred source address. Used in source address selection for outgoing packets. Have to be one of IP addresses of the router. |