-----------------
First of all you must configure BGP router with the :clicmd:`router bgp ASN`
-command. The AS number is an identifier for the autonomous system. The BGP
-protocol uses the AS number for detecting whether the BGP connection is
+command. The AS number is an identifier for the autonomous system. The AS
+identifier can either be a number or two numbers separated by a period. The
+BGP protocol uses the AS identifier for detecting whether the BGP connection is
internal or external.
.. clicmd:: router bgp ASN
If you do not want specific attributes, you can drop them using this command, and
let the BGP proceed by ignoring those attributes.
+.. clicmd:: neighbor <A.B.C.D|X:X::X:X|WORD> path-attribute treat-as-withdraw (1-255)...
+
+ Received BGP UPDATES that contain specified path attributes are treat-as-withdraw. If
+ there is an existing prefix in the BGP routing table, it will be removed.
+
.. clicmd:: neighbor <A.B.C.D|X:X::X:X|WORD> graceful-shutdown
Mark all routes from this neighbor as less preferred by setting ``graceful-shutdown``
Displaying Information about Peers
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-.. clicmd:: show bgp <afi> <safi> neighbors WORD bestpath-routes [json] [wide]
+.. clicmd:: show bgp <afi> <safi> neighbors WORD bestpath-routes [detail] [json] [wide]
For the given neighbor, WORD, that is specified list the routes selected
by BGP as having the best path.
+ If ``detail`` option is specified, the detailed version of all routes
+ will be displayed. The same format as ``show [ip] bgp [afi] [safi] PREFIX``
+ will be used, but for the whole table of received, advertised or filtered
+ prefixes.
+
+ If ``json`` option is specified, output is displayed in JSON format.
+
+ If ``wide`` option is specified, then the prefix table's width is increased
+ to fully display the prefix and the nexthop.
+
.. _bgp-peer-filtering:
Peer Filtering
.. clicmd:: neighbor PEER override-capability
-
Override the result of Capability Negotiation with local configuration.
Ignore remote peer's capability value.
+.. clicmd:: neighbor PEER capability software-version
+
+ Send the software version in the BGP OPEN message to the neighbor. This is
+ very useful in environments with a large amount of peers with different
+ versions of FRR or any other vendor.
+
+ Disabled by default.
+
.. _bgp-as-path-access-lists:
AS Path Access Lists
``7675:80`` can be used when AS 7675 wants to pass local policy value 80 to
neighboring peer.
-``internet``
- ``internet`` represents well-known communities value 0.
-
``graceful-shutdown``
``graceful-shutdown`` represents well-known communities value
``GRACEFUL_SHUTDOWN`` ``0xFFFF0000`` ``65535:0``. :rfc:`8326` implements
match community FILTER
-The communities value keyword ``internet`` has special meanings in standard
-community lists. In the below example ``internet`` matches all BGP routes even
-if the route does not have communities attribute at all. So community list
-``INTERNET`` is the same as ``FILTER`` in the previous example.
-
-.. code-block:: frr
-
- bgp community-list standard INTERNET deny 1:1
- bgp community-list standard INTERNET permit internet
-
-
The following configuration is an example of communities value deletion. With
this configuration the community values ``100:1`` and ``100:2`` are removed
from BGP updates. For communities value deletion, only ``permit``
there is no matched entry, deny will be returned. When `extcommunity` is
empty it matches to any routes.
- A special handling for ``internet`` community is applied. It matches
- any community.
-
.. clicmd:: bgp extcommunity-list expanded NAME permit|deny LINE
This command defines a new expanded extcommunity-list. `line` is a string
Set the BGP Input Queue limit for all peers when messaging parsing. Increase
this only if you have the memory to handle large queues of messages at once.
+.. clicmd:: bgp output-queue-limit (1-4294967295)
+
+ Set the BGP Output Queue limit for all peers when messaging parsing. Increase
+ this only if you have the memory to handle large queues of messages at once.
+
.. _bgp-displaying-bgp-information:
Displaying BGP Information
EVPN prefixes can also be filtered by EVPN route type.
+.. clicmd:: show bgp l2vpn evpn route [detail] [type <ead|1|macip|2|multicast|3|es|4|prefix|5>] self-originate [json]
+
+ Display self-originated EVPN prefixes which can also be filtered by EVPN route type.
+
.. clicmd:: show bgp vni <all|VNI> [vtep VTEP] [type <ead|1|macip|2|multicast|3>] [<detail|json>]
Display per-VNI EVPN routing table in bgp. Filter route-type, vtep, or VNI.
The ``terse`` option can be used in combination with the remote-as, neighbor,
failed and established filters, and with the ``wide`` option as well.
-.. clicmd:: show bgp [afi] [safi] [neighbor [PEER] [routes|advertised-routes|received-routes] [detail] [json]
+.. clicmd:: show bgp [afi] [safi] [neighbor [PEER] [routes|advertised-routes|received-routes] [<A.B.C.D/M|X:X::X:X/M> | detail] [json]
This command shows information on a specific BGP peer of the relevant
afi and safi selected.
The ``received-routes`` keyword displays all routes belonging to this
address-family (prior to inbound policy) that were received by this peer.
+ If a specific prefix is specified, the detailed version of that prefix will
+ be displayed.
+
If ``detail`` option is specified, the detailed version of all routes
will be displayed. The same format as ``show [ip] bgp [afi] [safi] PREFIX``
will be used, but for the whole table of received, advertised or filtered
If the ``json`` option is specified, output is displayed in JSON format.
-.. clicmd:: show [ip] bgp [afi] [safi] [all] neighbors A.B.C.D [advertised-routes|received-routes|filtered-routes] [detail] [json|wide]
+.. clicmd:: show [ip] bgp [afi] [safi] [all] self-originate [wide|json]
+
+ Display self-originated routes.
+
+ If ``wide`` option is specified, then the prefix table's width is increased
+ to fully display the prefix and the nexthop.
+
+ If the ``json`` option is specified, output is displayed in JSON format.
+
+.. clicmd:: show [ip] bgp [afi] [safi] [all] neighbors A.B.C.D [advertised-routes|received-routes|filtered-routes] [<A.B.C.D/M|X:X::X:X/M> | detail] [json|wide]
Display the routes advertised to a BGP neighbor or received routes
from neighbor or filtered routes received from neighbor based on the
if afi is specified, with ``all`` option, routes will be displayed for
each SAFI in the selcted AFI
+ If a specific prefix is specified, the detailed version of that prefix will
+ be displayed.
+
If ``detail`` option is specified, the detailed version of all routes
will be displayed. The same format as ``show [ip] bgp [afi] [safi] PREFIX``
will be used, but for the whole table of received, advertised or filtered
vpn_policy[AFI_IP].tovpn_sid: none
vpn_policy[AFI_IP6].tovpn_sid: 2001:db8:1:1::200
+AS-notation support
+-------------------
+
+By default, the ASN value output follows how the BGP ASN instance is
+expressed in the configuration. Three as-notation outputs are available:
+
+- plain output: both AS4B and AS2B use a single number.
+ ` router bgp 65536`.
+
+- dot output: AS4B values are using two numbers separated by a period.
+ `router bgp 1.1` means that the AS number is 65536.
+
+- dot+ output: AS2B and AS4B values are using two numbers separated by a
+ period. `router bgp 0.5` means that the AS number is 5.
+
+The below option permits forcing the as-notation output:
+
+.. clicmd:: router bgp ASN as-notation dot|dot+|plain
+
+ The chosen as-notation format will override the BGP ASN output.
.. _bgp-route-reflector:
projects / mirror_frr.git / blobdiff