Concept Guide

BGP global conguration default values
By default, BGP is disabled. The following table displays the default values for BGP on Dell EMC Networking OS.
Table 9. BGP Default Values
Item Default
BGP Neighbor Adjacency changes All BGP neighbor changes are logged.
Fast External Fallover feature Disabled
Graceful Restart feature Disabled
Local preference 100
MED 0
Route Flap Damping Parameters
half-life = 15 minutes
reuse = 750
suppress = 2000
max-suppress-time = 60 minutes
Distance
external distance = 20
internal distance = 200
local distance = 200
Timers
keepalive = 60 seconds
holdtime = 180 seconds
Add-path Disabled
BGP Attributes for selecting Best Path
Routes learned using BGP have associated properties that are used to determine the best route to a destination when multiple paths exist
to a particular destination.
These properties are referred to as BGP attributes, and an understanding of how BGP attributes inuence route selection is required for the
design of robust networks. This section describes the attributes that BGP uses in the route selection process:
• Weight
• Local Preference
• Multi-Exit Discriminators (MEDs)
• Origin
• AS Path
• Next Hop
NOTE
: There are no hard coded limits on the number of attributes that are supported in the BGP. Taking into account other
constraints such as the Packet Size, maximum number of attributes are supported in BGP.
Communities
BGP communities are sets of routes with one or more common attributes. Communities are a way to assign common attributes to multiple
routes at the same time.
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Border Gateway Protocol (BGP)