Important: The commands or keywords/variables that are available are dependent on platform type, product version, and installed license(s).[no] area { decimal_value | ip_address } {authentication [ message-digest ] | default-cost cost_value | nssa [default-information-originate] [no-redistribution] [no-summary] [translate-always] [translate-candidate] [translate-never] | stub [no-summary] | virtual-link router_ip_address [authentication {message-digest | null | text}| authentication-key {encrypted password encrypted_string | password password_string}| message-digest-key key_id md5 [encrypted password encrypted_string | password password_string]} [dead-interval] [hello-interval] [retransmit-interval] [transmit-delay]
Disables or removes configured parameters for the specified OSPF area using a specific VRF instance.
default-cost cost_value
Sets the default cost for an OSPF area. cost_value must be an integer from 0 through 16777215.
default-information-originate: Configures the OSPF VRF instances to originate default information to the NSSA area.
no-redistribution: Configures the OSPF VRF instance to not to redistribute external routes to the NSSA area.
no-summary: Configures the OSPF VRF instance to not to inject the inter-area routes into NSSA.
translate-always: Configures the NSSA-ABR (Area Border Router) always to translate. By default this is disabled.
translate-candidate: Configures the NSSA-ABR always to translate election. By default this is enabled.
translate-never: Configures the NSSA-ABR never to translate. By default this is disabled.
no-summary: Disables (stops) the ABR from sending summary LSAs into the stub area.
virtual-link router_id
router_id must be an IP address in IPv4 dotted-decimal notation of the ABR to be linked to.
authentication {message-digest | null | text}
message-digest: Set the OSPF authentication type to use the message digest (MD) authentication method.
null: Set the OSPF authentication type to use no authentication, thus disabling either MD or clear text methods.
text: Set the OSPF authentication type to use the clear text authentication method.
message-digest-key key_id
Specifies the MD key identifier number for virtual link connection. key_id must be an integer from 1 through 255.
[encrypted] password passwd_string
Specifies the password required for virtual link connection authentications. The keyword password is optional and if specified passwd_string must be an alphanumeric string of 1 through 63 characters. The password specified must be in an encrypted format if the optional keyword encrypted was specified.
The encrypted keyword is intended only for use by the system while saving configuration scripts. The system displays the encrypted keyword in the configuration file as a flag that the variable following the password keyword is the encrypted version of the plain text password. Only the encrypted password is saved as part of the configuration file. encrypted_string is an alphanumeric string of 1 through 523 characters.
dead-interval value
Specifies the dead interval (in seconds) that the router should wait, during which time no packets are received and after the router considers a neighboring router to be off-line. value must be an integer from 1 through 65535.
hello-interval value
Specifies the hello interval (in seconds) before sending a hello packet. value must be an integer from 1 through 65535.
retransmit-interval value
Specifies the delay between retransmission (in seconds) that router should wait before retransmitting a packet. value must be an integer from 1 through 3600.
transmit-delay value
Specifies the interval (in seconds) that the router should wait before transmitting a packet. value must be an integer from 1 through 3600.
The following command enables authentication for an OSPF area defined by the IP address 192.168.100.10 and the OSPF authentication type to MD5:
The following command defines the area designated by the IP address 192.168.100.10 as an NSSA area where translation of NSSA candidate is enabled by default:
The following command defines the OSPF area defined by the IP address 192.168.100.10 as a stub area:
The following command creates a virtual link between the OSPF areas defined by the IP address 192.168.100.10 and the IP address 192.168.200.20:
The following command sets the authentication method for a virtual link between the OSPF areas defined by the IP address 192.168.100.10 and the IP address 192.168.200.20 to use no authentication:
The following command creates an authentication password of 123456 for a virtual link between the OSPF areas defined by the IP address 192.168.100.10 and the IP address 192.168.200.20:
The following command enables the use of MD5-based OSPF authentication for a virtual link between the OSPF areas defined by the IP address 192.168.100.10 and the IP address 192.168.200.20, sets the MD5 Key ID to 25, and the password to 123456:
The following command sets the retransmit interval for a virtual link between the OSPF areas defined by the IP address 192.168.100.10 and the IP address 192.168.200.20 to 60 seconds:
default-information originate [ always ] [ metric metric_value ] [ metric-type { 1 | 2 } ] [ route-map route_map_name ]
metric metric_value
1: Sets the OSPF external link type for default routes to Type 1.
2: Sets the OSPF external link type for default routes to Type 2.
route-map route_map_name
default-metric metric_value
[ no ] distance { distance_value | ospf { [ external distance_value ] [ inter-area distance_value ] [ intra-area distance_value ] } }
external distance_value: Set the OSPF route administrative distance for routes from other routing domains, learned by redistribution. This must be an integer from 1 through 255. The default is 110.
inter-area distance_value: sets the OSPF route administrative distance for routes from one routing area to another. This must be an integer from 1 through 255. The default is 110.
intra-area distance_value: sets the OSPF route administrative distance for all routes within an area. This must be an integer from 1 through 255. The default is 110.
The following command uses the route access list named ral1 to filter outgoing routing updates for all connected routes:
poll-interval poll_interval_value
priority priority_value
Specifies the network address and mask as well as the interface on which OSPF will be enabled. network_ip_address in entered in IPv4 dotted-decimal notation, followed by the “/” and the mask (CIDR).
The following command specified that the OSPF router will use the interface at IP address 192.168.1.0 with a netmask of 24:
ospf router-id ip_address
Disables ospf router-id.
The following command sets the router ID to 192.168.200.1:
redistribute { connected | rip | static } [ metric metric_value ] [ metric-type { 1 | 2 } ] [ route-map route_map_name ]
metric metric_value
1: Sets the OSPF external link type for routes to Type 1.
2: Sets the OSPF external link type for routes to Type 2.
route-map route_map_name
Filter routes through the specified route map before redistribution. route_map_name specifies the name of the route-map to use as an alphanumeric string of 1 through 79 characters.
The following command sets the refresh timer to 90 seconds:
The following command sets the router ID to 192.168.200.1:
