3com MSR 20-20 참조 매뉴얼

C

HAPTER

 72: BGP C

ONFIGURATION

 C

OMMANDS

preference { external-preference internal-preference local-preference | route-policy 
route-policy-name }

BGP view/BGP-VPN instance view

external-preference: Preference of EBGP route, in the range 1 to 255.

internal-preference: Preference of IBGP route, in the range 1 to 255. An IBGP is a 
route learned from another peer inside AS.

local-preference: Preference of local route, in the range 1 to 255.

route-policy-name: Routing policy name, a string of 1 to 19 characters. Using the 
routing policy can set preference for routes passing through it. For the routes 
filtered out, the default value applies.

Use the preference command to configure preferences for external, internal, and 
local routes.

Use the undo preference command to restore the default.

For external-preference, internal-preference and local-preference, the bigger the 
preference value is, the lower the preference is, and the default values are 255, 
255, 130 respectively.

# In BGP view, configure preferences for EBGP, IBGP and local routes as 20, 20 and 
200.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] preference 20 20 200 

# In BGP-VPN instance view, configure preferences for EBGP, IBGP and local routes 
as 20, 20 and 200 (the VPN has been created).

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] ipv4-family vpn-instance vpn1

[Sysname-bgp-vpn1] preference 20 20 200 

BGP view