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C

HAPTER

 27: BGP C

ONFIGURATION

 C

OMMANDS

acl-number: Number of the specified AS path to be matched, ranging from 1 to 
199.

network-address: Displays the flap information of this IP address.

mask: Network mask.

longer-match: Shows the route flap-info that is more specific than address, mask.

Use the display bgp routing-table flap-info command to view BGP flap-info. If 
the network-address mask arguments are set to 0.0.0.0 0.0.0.0, this command 
displays the flap statistics of all BGP routes.

# Display BGP flap-info.

<SW8800> display bgp routing-table flap-info

 

Flags:     # - valid,        ^ - best,

 

          D - damped,   H - history,

 

          I - internal,     S - aggregate suppressed

 

       B - balance

 

 
Dest/Mask         Source  Keepup-time  Damping-limit  Flap-times  Origin  As-path

 

--------------------------------------------------------------------

 

#D  11.1.0.0/16 133.1.1.2   48     1:20:30        4          IGP    200 

Table 77   Description of the fields of the display bgp routing-table flap-info command

Flags 

State flags:

# - valid (valid)

^ - best (selected)

D - damped (discarded)

H - history (history)

I - internal (interior gateway protocol)

S - aggregate suppressed (suppressed) 

#D 

The valid and damped route 

Dest/Mask 

The dampened route to the destination network 11.1.0.0 

Source 

The nexthop of the route 

Keepup-time 

The time that route damping has continued 

Damping-limit  The time before dampening turns invalid and the route can be reused. 

Flap-times 

The times of the route flap 

Origin 

Origin attribute of route, which indicates that the route updates its origin 
relative to the route originating it from AS. It has three optional values: 

IGP 

The route belongs to inside of AS. BGP treats aggregate route and 
the route defined by the command network as inside of AS, and 
origin type as IGP. 

EGP 

The route is learned from exterior gateway protocol (EGP). 

INC 

Short for INCOMPLETE: indicates that the original source of the 
route information is unknown (learned by other methods). BGP sets 
the origin of the route imported through other IGP protocols as 
INCOMPLETE