display bgp routing-table flap-info

Use display bgp routing-table flap-info to display BGP route flap statistics.

Syntax

display bgp [ instance instance-name ] routing-table flap-info ipv4 { multicast | [ unicast ] [ vpn-instance vpn-instance-name ] } [ ipv4-address [ { mask-length | mask } [ longest-match ] ] | as-path-acl as-path-acl-number ]

display bgp [ instance instance-name ] routing-table flap-info ipv6 { multicast | [ unicast ] [ vpn-instance vpn-instance-name ] } [ ipv6-address prefix-length | as-path-acl as-path-acl-number ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

instance instance-name: Specifies a BGP instance by its name, a case-sensitive string of 1 to 31 characters. If you do not specify this option, the command displays BGP route flap statistics for the default BGP instance.

ipv4: Displays BGP IPv4 route flap statistics.

ipv6: Displays BGP IPv6 route flap statistics.

multicast: Displays BGP multicast route flap statistics.

unicast: Displays BGP unicast route flap statistics.

vpn-instance vpn-instance-name: Specifies an MPLS L3VPN instance by its name, a case-sensitive string of 1 to 31 characters. If you do not specify a VPN instance, this command displays BGP route flap statistics for the public network.

ipv4-address: Specifies a destination network address.

mask-length: Specifies a mask length in the range of 0 to 32.

mask: Specifies a network mask in dotted decimal notation.

longest-match: Specifies longest match mode, which selects the longest matching route through the following steps:

ANDs the specified network address with the mask of each route.
Matches a route if the AND result is the same as the network address of the route and the mask of the route is shorter than or equal to the specified mask.
Selects the route with the longest mask among the matching routes.

ipv6-address prefix-length: Displays route flap statistics for BGP IPv6 routes that match the specified network address, and match the prefix length in the range of 0 to 128.

as-path-acl as-path-acl-number: Displays route flap statistics for BGP routes that match the AS path list specified by its number in the range of 1 to 256.

Usage guidelines

If you specify only the ipv4-address argument, the system ANDs the network address with the mask of a route. If the result matches the network address of the route, the command displays flap statistics of the route.

If you specify the ipv4-address mask or ipv4-address mask-length argument, and do not specify the longest-match keyword, the command displays flap statistics of the BGP IPv4 unicast or multicast route that matches both the specified destination network address and the mask (or mask length).

By default, the unicast keyword is used if neither the multicast keyword nor the unicast keyword is specified.

Examples

# Display BGP IPv4 unicast route flap statistics.

<Sysname> display bgp routing-table flap-info ipv4

 Total number of routes: 1

 BGP local router ID is 192.168.1.135
 Status codes: * - valid, > - best, d - dampened, h - history,
               s - suppressed, S - stale, i - internal, e - external
               a – additional-path
               Origin: i - IGP, e - EGP, ? - incomplete

     Network            From            Flaps  Duration  Reuse        Path/Ogn

  de 20.1.1.0/24        10.1.1.2        1      00:02:36  00:53:58     100i

# Display BGP IPv6 unicast route flap statistics.

<Sysname> display bgp routing-table flap-info ipv6

 Total number of routes: 2

 BGP local router ID is 192.168.1.135
 Status codes: * - valid, > - best, d - dampened, h - history,
               s - suppressed, S - stale, i - internal, e - external
               a – additional-path
               Origin: i - IGP, e - EGP, ? - incomplete

  de Network : 2::                                      PrefixLen : 64
     From    : 10.1.1.1                                 Flaps     : 5
     Duration: 00:03:25                                 Reuse     : 00:39:28
     Path/Ogn: 100i

  de Network : 2::                                      PrefixLen : 64
     From    : 1::1                                     Flaps     : 5
     Duration: 00:03:25                                 Reuse     : 00:39:28
     Path/Ogn: 100i

Table 97: Command output

Field	Description
Status codes	Status codes: * – valid—Valid route. > – best—Optimal route. d – dampened—Dampened route. h – history—History route. s – suppressed—Suppressed route. S – stale—Stale route. i – internal—Internal route. e – external—External route. a – additional-path—Add-Path optimal route.
Origin	Origin of the route: i – IGP—Originated in the AS. The origin of routes advertised with the network command is IGP. e – EGP—Learned through EGP. ?– incomplete—Unknown origin. The origin of routes redistributed from IGP protocols is INCOMPLETE.
Network	Destination network address.
From	Source IP address of the route.
Flaps	Number of routing flaps.
Duration	Duration time of the flap route.
Reuse	Reuse time of the route.
Path/Ogn	AS_PATH and ORIGIN attributes of the route: AS_PATH attribute—Records the ASs the route has passed, which avoids routing loops. ORIGIN attribute—Identifies the origin of the route.

Related commands

dampening

reset bgp flap-info

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