Huawei Quidway NetEngine80E Configuration Manual page 914

HUAWEI NetEngine80E/40E Router
Configuration Guide - IP Routing
Table 8-10 BGP route selection process
Abbr
eviate
d
Alias
P
P
A
NOTE
A
A
O
Issue 02 (2014-09-30)
Matching
Item
PrefVal
Local_Pref
Route type
A is
the
initia
l of
the
chara
cter
strin
g
(AS
NIL).
Accumulated
Interior
Gateway
Protocol
(AIGP)
AS_Path
Origin
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Route Selection Rules
The route with the largest
PreVal value is preferred.
The default value is 0.
The route with the largest
Local_Pref value is
preferred.
The default value is 100.
A > S > N > I > L, in
which:
l A: indicates that
routes are
summarized using the
aggregate command.
l S: indicates that routes
are summarized using
the summary
automatic command.
l N: indicates that
routes are imported
using the network
command.
l I: indicates that routes
are imported using the
import-route
command.
l L: indicates that
routes are learned
from BGP peers.
The route with the
smallest AIGP value is
preferred.
The route with AIGP to
the route without AIGP is
preferred.
The route with the
shortest AS_Path length
is preferred.
IGP > EGP > Incomplete -
8 BGP Configuration
Remarks
PrefVal is Huawei-specific and valid
only on the device where it is
configured.
To modify the default Local_Pref
value of BGP routes, run the default
local-preference command.
-
-
If the bestroute as-path-ignore
command is configured, BGP does not
compare the AS_Path attribute.
889