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| author | Christian Poessinger <christian@poessinger.com> | 2019-12-19 17:34:49 +0100 |
|---|---|---|
| committer | Christian Poessinger <christian@poessinger.com> | 2019-12-19 17:34:49 +0100 |
| commit | 538e296e1f0ff2997e1e558114481490c2e6ff29 (patch) | |
| tree | c5db80cceff929b1134c5ded718e22834438a7b5 /docs | |
| parent | 5ec9ab00bc619afd5e1b1ecca74e8911dc8a35f8 (diff) | |
| download | vyos-documentation-538e296e1f0ff2997e1e558114481490c2e6ff29.tar.gz vyos-documentation-538e296e1f0ff2997e1e558114481490c2e6ff29.zip | |
bgp: add chapter on route selection
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/routing/bgp.rst | 30 |
1 files changed, 24 insertions, 6 deletions
diff --git a/docs/routing/bgp.rst b/docs/routing/bgp.rst index 9308c62d..d8860e15 100644 --- a/docs/routing/bgp.rst +++ b/docs/routing/bgp.rst @@ -161,16 +161,34 @@ ASN and Router ID .. cfgcmd:: set protocols bgp '<ASN>' -First of all you must configure BGP router with the :abbr:`ASN (Autonomous -System Number)`. The AS number is an identifier for the autonomous system. The -BGP protocol uses the AS number for detecting whether the BGP connection is -internal or external. + First of all you must configure BGP router with the :abbr:`ASN (Autonomous + System Number)`. The AS number is an identifier for the autonomous system. + The BGP protocol uses the AS number for detecting whether the BGP connection + is internal or external. .. cfgcmd:: set protocols bgp '<ASN>' parameters router-id -This command specifies the router-ID. If router ID is not specified it will use -the highest interface IP address. + This command specifies the router-ID. If router ID is not specified it will + use the highest interface IP address. +Route Selection +--------------- + +.. cfgcmd:: set protocols bgp '<ASN>' parameters bestpath as-path confed + + This command specifies that the length of confederation path sets and + sequences should should be taken into account during the BGP best path + decision process. + +.. cfgcmd:: set protocols bgp '<ASN>' parameters bestpath as-path multipath-relax + + This command specifies that BGP decision process should consider paths + of equal AS_PATH length candidates for multipath computation. Without + the knob, the entire AS_PATH must match for multipath computation. + +.. cfgcmd:: set protocols bgp '<ASN>' parameters bestpath as-path ignore + + Ignore AS_PATH length when selecting a route IPv4 ^^^^ |