diff options
Diffstat (limited to '')
| -rw-r--r-- | doc/user/bgp.rst | 113 |
1 files changed, 101 insertions, 12 deletions
diff --git a/doc/user/bgp.rst b/doc/user/bgp.rst index 99d2a8c..150a915 100644 --- a/doc/user/bgp.rst +++ b/doc/user/bgp.rst @@ -589,26 +589,52 @@ Route Flap Dampening .. clicmd:: bgp dampening (1-45) (1-20000) (1-50000) (1-255) - This command enables BGP route-flap dampening and specifies dampening parameters. + This command enables (with optionally specified dampening parameters) or + disables route-flap dampening for all routes of a BGP instance. + +.. clicmd:: neighbor PEER dampening [(1-45) [(1-20000) (1-20000) (1-255)]] + + This command enables (with optionally specified dampening parameters) or + disables route-flap dampening for all routes learned from a BGP peer. + +.. clicmd:: neighbor GROUP dampening [(1-45) [(1-20000) (1-20000) (1-255)]] + + This command enables (with optionally specified dampening parameters) or + disables route-flap dampening for all routes learned from peers of a peer + group. half-life - Half-life time for the penalty + Half-life time for the penalty in minutes (default value: 15). reuse-threshold - Value to start reusing a route + Value to start reusing a route (default value: 750). suppress-threshold - Value to start suppressing a route + Value to start suppressing a route (default value: 2000). max-suppress - Maximum duration to suppress a stable route + Maximum duration to suppress a stable route in minutes (default value: + 60). The route-flap damping algorithm is compatible with :rfc:`2439`. The use of - this command is not recommended nowadays. + these commands is not recommended nowadays. At the moment, route-flap dampening is not working per VRF and is working only for IPv4 unicast and multicast. + With different parameter sets configurable for BGP instances, peer groups and + peers, the active dampening profile for a route is chosen on the fly, + allowing for various changes in configuration (i.e. peer group memberships) + during runtime. The parameter sets are taking precedence in the following + order: + + 1. Peer + 2. Peer group + 3. BGP instance + + The negating commands do not allow to exclude a peer/peer group from a peer + group/BGP instances configuration. + .. seealso:: https://www.ripe.net/publications/docs/ripe-378 @@ -1064,7 +1090,7 @@ BGP GR Global Mode Commands This command will enable BGP graceful restart functionality at the global level. -.. clicmd:: bgp graceful-restart disable +.. clicmd:: bgp graceful-restart-disable This command will disable both the functionality graceful restart and helper mode. @@ -1334,7 +1360,14 @@ OSPFv3 into ``address-family ipv4 unicast`` as OSPFv3 supports IPv6. .. clicmd:: redistribute <babel|connected|eigrp|isis|kernel|openfabric|ospf|ospf6|rip|ripng|sharp|static> [metric (0-4294967295)] [route-map WORD] -Redistribute routes from other protocols into BGP. + Redistribute routes from other protocols into BGP. + + Note - When redistributing a static route, or any better Admin Distance route, + into BGP for which the same path is learned dynamically from another BGP + speaker, if the redistribute path is more preferred from a BGP Best Path + standpoint than the dynamically learned path, then BGP will not export + the best path to Zebra(RIB) for installation into the routing table, + unless BGP receives the path before the static route is created. .. clicmd:: redistribute <table|table-direct> (1-65535)] [metric (0-4294967295)] [route-map WORD] @@ -1565,6 +1598,15 @@ Configuring Peers value is carried encoded as uint32. To enable backward compatibility we need to disable IEEE floating-point encoding option per-peer. +.. clicmd:: neighbor PEER extended-link-bandwidth + + By default bandwidth in extended communities is carried encoded as IEEE + floating-point format, and is limited to maximum of 25 Gbps. + + Enabling this parameter, you can use the bandwidth of to 4294967295 Mbps. + + This is disabled by default. + .. clicmd:: neighbor PEER enforce-first-as Discard updates received from the specified (eBGP) peer if the AS_PATH @@ -1785,6 +1827,17 @@ Configuring Peers Do not accept additional paths from this neighbor. +.. clicmd:: neighbor <A.B.C.D|X:X::X:X|WORD> addpath-rx-paths-limit (1-65535) + + Limit the maximum number of paths a BGP speaker can receive from a peer, optimizing + the transmission of BGP routes by selectively relaying pertinent routes instead of + the entire set. + + If this command is configured, the sender will only send the number of paths specified + in PATHS-LIMIT capability. + + To exchange this limit, both peers must support the PATHS-LIMIT capability. + .. clicmd:: neighbor PEER ttl-security hops NUMBER This command enforces Generalized TTL Security Mechanism (GTSM), as @@ -1810,7 +1863,7 @@ Configuring Peers This includes changing graceful-restart (LLGR also) timers, enabling/disabling add-path, and other supported capabilities. -.. clicmd:: neighbor PEER capability fqdn +.. clicmd:: neighbor PEER capability fqdn Allow BGP to negotiate the FQDN Capability with its peers. @@ -1819,7 +1872,7 @@ Configuring Peers This capability is activated by default. The ``no neighbor PEER capability fqdn`` avoid negotiation of that capability. This is useful for peers who - are not supporting this capability or supporting BGP Capabilities + are not supporting this capability or supporting BGP Capabilities Negotiation RFC 2842. .. clicmd:: neighbor <A.B.C.D|X:X::X:X|WORD> accept-own @@ -1943,6 +1996,13 @@ Configuring Peers outputs. It's easier to troubleshoot if you have a number of BGP peers and a number of routes to check. +.. clicmd:: bgp default dynamic-capability + + This command enables dynamic capability advertisement by default + for all the neighbors. + + For ``datacenter`` profile, this is enabled by default. + .. clicmd:: bgp default software-version-capability This command enables software version capability advertisement by default @@ -3201,6 +3261,31 @@ L3VPN SRv6 Specify the SRv6 locator to be used for SRv6 L3VPN. The Locator name must be set in zebra, but user can set it in any order. +L3VPN SRv6 SID reachability +--------------------------- + +In the context of IPv4 L3VPN over SRv6 specific usecase, 2001:db8:12::2 +is the peer IPv6 address of r2, and 2001:db8:2:2:: is the SRv6 SID +advertised by router r2 for prefix P. On r1, the SID reachability is +checked in order to install the prefix P. The below output indicates +that the 2001:db8:2:2:: prefix is valid. + + +.. code-block:: frr + + r1# show bgp nexthop detail + Current BGP nexthop cache: + 2001:db8:2:2:: valid [IGP metric 0], #paths 4 + gate 2001:db8:12::2, if eth0 + Last update: Tue Nov 14 10:36:28 2023 + Paths: + 1/1 192.168.2.0/24 VRF vrf10 flags 0x4018 + 1/3 192.168.2.0/24 RD 65002:10 VRF default flags 0x418 + 2001:db8:12::2 valid [IGP metric 0], #paths 0, peer 2001:db8:12::2 + if eth0 + Last update: Tue Nov 14 10:36:26 2023 + Paths: + General configuration ^^^^^^^^^^^^^^^^^^^^^ @@ -4017,6 +4102,10 @@ The following are available in the top level *enable* mode: Clear all peers. +.. clicmd:: clear bgp ipv4|ipv6 ASNUM + + Clear peers with the AS number in plain or dotted format. + .. clicmd:: clear bgp ipv4|ipv6 \* Clear all peers with this address-family activated. @@ -4848,8 +4937,8 @@ setting. .. clicmd:: bgp session-dscp (0-63) -This command allows bgp to control, at a global level, the TCP dscp values -in the TCP header. +This command allows the BGP daemon to control, at a global level, the DSCP value +used in outgoing packets for each BGP connection. .. _bgp-suppress-fib: |