Huawei Quidway NetEngine80E Configuration Manual page 321

HUAWEI NetEngine80E/40E Router
Configuration Guide - IP Routing
The default route is generally applied to the following scenarios:
1.
2.
When no exactly matched route is discovered, the router can forward packets through the default
route.
The preference of the default route in Type 3 LSAs is higher than that of the route in Type 5 or
Type 7 LSAs.
The advertising mode of the default route is determined by the type of the area to which the
default route is imported, as shown in
Table 5-2 Default route advertising mode
Area
Type
Commo
n area
Stub
area
NSSA
Totally
NSSA
Perform the following steps on the ASBR running OSPF.
Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run:
ospf [ process-id ]
The OSPF process view is displayed.
Step 3 Run:
default-route-advertise [ [ always | permit-calculate-other ] | cost cost | type
type | route-policy route-policy-name ]
The default route is imported into the OSPF process.
Issue 02 (2014-09-30)
An ABR in an area advertises Type 3 LSAs carrying the default route within the area.
routers in the area use the received default route to forward inter-area packets.
An ASBR in an AS advertises Type 5 or Type 7 LSAs carrying the default route within the
AS. routers in the AS use the received default route to forward AS external packets.
Generated By
The default-route-advertise command
Automatically
The nssa [ default-route-advertise ]
command
Automatically
Automatically
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Table 5-2.
Advertise
d By
ASBR
ABR
ASBR
ABR
ABR
*
5 OSPF Configuration
LSA Type Floodi
ng
Area
Type 5 LSA Comm
on area
Type 3 LSA Stub
area
Type 7 LSA NSSA
Type 3 LSA NSSA
Type 3 LSA NSSA
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