411
Command Mode:
OSPF protocol mode
Usage Guide:
This command is used for restraining routes from specific area from
spreading between this area and other areas.
Example:
Set a filter on the area 1
Switch(config)#access-list 1 deny 172.22.0.0 0.0.0.255
Switch(config)#access-list 1 permit any-source
Switch(config)#router ospf 100
Switch(config-router)#area 1 filter-list access 1 in
13.6.3.4 area nssa
Command: area <id> nssa [TRANSLATOR| no-redistribution |DEFAULT-ORIGINATE
|no-summary]
no area <id> nssa
Function:
Set the area to Not-So-Stubby-Area (NSSA ) area
Parameter: <id>
is the area number which could be digits ranging between 0
～
4294967295, and also as an IP address.
TRANLATOR = translator-role {candidate|never|always}
, specifies the LSA translation
mode for routes:
candidate
means if the router is elected translator, Type 7 LSA can be
translated to Type-5 LSA, the default is
candidate
never
means the router will never translate Type 7 LSA to Type 5 LSA
always
means the route always translate Type 7 LSA to Type 5 LSA
no-redistribution
means never distribute external-LSA to NSSA.
DEFAULT-ORIGINATE=default-information-originate [metric <0-16777214>]
[metric-type <1-2>]
, generate the Type-7 LSA
metric
<0-16777214>
specify the metric value
metric-type <1-2>
specifies the metric value type of external-LSA , default value is 2.
no-summary
shows not injecting area route to the NSSA
Default:
No NSSA area defined by default
Command Mode:
OSPF protocol mode
Usage Guide:
The same area can not be both NSSA and stub at the same time
Example:
Set area 53 and 3 to NSSA
Switch#config terminal
Switch(config)#router ospf 100
Switch(config-router)#area 0.0.0.51 nssa
Switch(config-router)#area 3 nssa default-information-originate metric 34 metric-type 2
translator-role candidate no-redistribution
13.6.3.5 area range
