diff options
Diffstat (limited to 'doc/bird.sgml')
| -rw-r--r-- | doc/bird.sgml | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/doc/bird.sgml b/doc/bird.sgml index 5ceb8ab9..b3f6a85c 100644 --- a/doc/bird.sgml +++ b/doc/bird.sgml @@ -1033,10 +1033,23 @@ incompatible with each other (that is to prevent you from shooting in the foot). <cf><m/P/.len</cf> returns the length of path <m/P/. - <cf>prepend(<m/P/,<m/A/)</cf> prepends ASN <m/A/ to path <m/P/ and returns the result. + <cf>prepend(<m/P/,<m/A/)</cf> prepends ASN <m/A/ to path + <m/P/ and returns the result. + + <cf>delete(<m/P/,<m/A/)</cf> deletes all instances of ASN + <m/A/ from from path <m/P/ and returns the result. + <m/A/ may also be an integer set, in that case the + operator deletes all ASNs from path <m/P/ that are also + members of set <m/A/. + + <cf>filter(<m/P/,<m/A/)</cf> deletes all ASNs from path + <m/P/ that are not members of integer set <m/A/. + I.e., <cf/filter/ do the same as <cf/delete/ with inverted + set <m/A/. + Statement <cf><m/P/ = prepend(<m/P/, <m/A/);</cf> can be shortened to <cf><m/P/.prepend(<m/A/);</cf> if <m/P/ is appropriate route attribute - (for example <cf/bgp_path/). + (for example <cf/bgp_path/). Similarly for <cf/delete/ and <cf/filter/. <tag/bgpmask/ BGP masks are patterns used for BGP path matching @@ -1169,7 +1182,7 @@ undefined value is regarded as empty clist for most purposes. Preference of the route. Valid values are 0-65535. (See the chapter about routing tables.) <tag><m/ip/ from</tag> - The router which the route has originated from. Read-only. + The router which the route has originated from. <tag><m/ip/ gw</tag> Next hop packets routed using this route should be forwarded to. |