Enables authentication for the specified OSPF area.

Product

PDSN

HA

GGSN

Privilege

Security Administrator, Administrator

Mode

Exec > Global Configuration > Context Configuration > OSPF Configuration

configure > context context_name > router ospf

Entering the above command sequence results in the following prompt:

[local]host_name(config-ospf)#

Syntax

Syntax Description

[ no ] area  { ip_address | decimal_value } authentication [ message-digest ]

no

Disables authentication for the specified area.

ip_address

Specifies the IP address of the area where authentication will be enabled in IPv4 dotted-decimal notation.

decimal_value

Specifies the identification number of the area where authentication will be enabled. This must be an integer from 0 through 4294967295.

authentication

Sets the OSPF authentication type to use the simple authentication method.

message-digest

Sets the OSPF authentication type to use the message digest 5 (MD5) authentication method.

Usage Guidelines

Use this command to enable authentication of OPSF areas.

Configures the default cost for an area.

Product

PDSN

HA

GGSN

Privilege

Security Administrator, Administrator

Mode

Exec > Global Configuration > Context Configuration > OSPF Configuration

configure > context context_name > router ospf

Entering the above command sequence results in the following prompt:

[local]host_name(config-ospf)#

Syntax

Syntax Description

[ no ] area { ip_address | decimal_value } default-cost cost_value

no

Deletes the default cost for the area.

ip_address

Specifies the IP address of the area in IPv4 dotted-decimal notation.

decimal_value

Specifies the identification number of the area as an integer from 0 through 4294967295.

cost_value

Sets the default cost to be configured for the specified area as an integer from 0 through 16777215.

Usage Guidelines

Use this command to configure the default cost for an OSPF area.

Defines an area as an NSSA (Not So Stubby Area) and configures OSPF parameters for it.

Product

PDSN

HA

GGSN

Privilege

Security Administrator, Administrator

Mode

Exec > Global Configuration > Context Configuration > OSPF Configuration

configure > context context_name > router ospf

Entering the above command sequence results in the following prompt:

[local]host_name(config-ospf)#

Syntax

Syntax Description

[ no ] area { ip_address | decimal_value } nssa [ default-information-originate ] [ no-redistribution ] [ no-summary ] [ translate-always ] [ translate-candidate ] [ translate-never ]

ip_address

Specifies the IP address of the NSSA in IPv4 dotted-decimal notation.

decimal-value

Specifies the identification number of the NSSA area as an integer from 0 through 4294967295.

default-information-originate

Originates default information to the NSSA area.

no-redistribution

Does not redistribute external routes to the NSSA area.

no-summary

Does not inject inter-area routes into NSSA.

translate-always

Configures the NSSA-ABR (Area Border Router) to always translate

translate-candidate

Configure NSSA-ABR for translate election. (This is enabled by default.)

translate-never

Configure NSSA-ABR to never translate.

Usage Guidelines

Use this command to define NSSA areas.

Defines an area as an OSPF stub area.

Product

PDSN

HA

GGSN

Privilege

Security Administrator, Administrator

Mode

Exec > Global Configuration > Context Configuration > OSPF Configuration

configure > context context_name > router ospf

Entering the above command sequence results in the following prompt:

[local]host_name(config-ospf)#

Syntax

Syntax Description

[ no ] area { ip_address | decimal_value } stub [ no-summary ]

ip_address

Specifies the IP address of the stub area in IPv4 dotted-decimal notation.

decimal_value

Specifies the identification number of the stub area as an integer from 0 through 4294967295.

stub

Specifies this is a stub area.

no-summary

Disables (stops) the ABR (Area Border Router) from sending summary link state advertisements (LSAs) into the stub area.

Usage Guidelines

Use this command to define an OPSF area as a stub area.

Configures a virtual link between an area that cannot be physically connected to the network backbone and an area that is physically connected to the network backbone.

Product

PDSN

HA

GGSN

Privilege

Security Administrator, Administrator

Mode

Exec > Global Configuration > Context Configuration > OSPF Configuration

configure > context context_name > router ospf

Entering the above command sequence results in the following prompt:

[local]host_name(config-ospf)#

Syntax

Syntax Description

[ no ] area { ip_address | decimal_value } virtual-link router_id_address 

no

Disables area virtual-link.

ip_address

Specifies the IP address of the transit area in IPv4 dotted-decimal notation.

decimal_value

Specifies The identification number of the transit area as an integer from 0 through 4294967295.

router_id_address

Specifies the router id of the ABR to be linked to in IPv4 dotted-decimal notation.

Usage Guidelines

Use this command to create a virtual link between an area that is connected to the network backbone and an area that cannot be connected to the network backbone.

Configures the OSPF authentication method to be used by the virtual link between an area that cannot be physically connected to the network backbone and an area that is physically connected to the network backbone.

Product

PDSN

HA

GGSN

Privilege

Security Administrator, Administrator

Mode

Exec > Global Configuration > Context Configuration > OSPF Configuration

configure > context context_name > router ospf

Entering the above command sequence results in the following prompt:

[local]host_name(config-ospf)#

Syntax

Syntax Description

[ no ] area { ip_address | decimal_value } virtual-link router_id_address authentication { message-digest | null | text }

no

Disables area virtual link authentication.

ip_address

Specifies the IP address of the transit ares in IPv4 dotted-decimal notation.

decimal_value

Specifies the identification number of the transit area as an integer from 0 through 4294967295.

router_id_address

Specifies the router id of the ABR to be linked to in IPv4 dotted-decimal notation.

authentication

Sets the OSPF authentication type to use the simple authentication method.

message-digest

Sets 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.

Usage Guidelines

Use this command to set the authentication method for a virtual link between an area that is connected to the network backbone and an area that cannot be connected to the network backbone.

Configures the authentication password for the virtual link between an area that cannot be physically connected to the network backbone and an area that is physically connected to the network backbone.

Product

PDSN

HA

GGSN

Privilege

Security Administrator, Administrator

Mode

Exec > Global Configuration > Context Configuration > OSPF Configuration

configure > context context_name > router ospf

Entering the above command sequence results in the following prompt:

[local]host_name(config-ospf)#

Syntax

Syntax Description

area { ip_address | decimal_value } virtual-link router_id_address authentication-key { encrypted password encrypted_key | password password_key }
no area { ipaddress | decimal_value } virtual-link router_id_address authentication-key

no

Disables the area virtual link authentication key.

ipaddress

Specifies the IP address of the transit area in IPv4 dotted-decimal notation.

decimal-value

Specifies the identification number of the transit area as an integer from 0 through 4294967295.

router_id_address

Specifies the router id of the ABR to be linked to in IPv4 dotted-decimal notation.

encrypted password

encrypted_key is an alphanumeric string of 1 through 523 characters.

Use this if you are pasting a previously encrypted authentication key into the CLI command.

password password_key

The password to use for authentication. password_key is an alphanumeric string of 1 through 16 characters that denotes the authentication password. This variable is entered in clear text format.

Usage Guidelines

Use this command to specify the authentication password for a virtual link between an area that is connected to the network backbone and an area that cannot be connected to the network backbone.

Configures the interval or delay type, and the delay time in seconds, for the virtual link between an area that cannot be physically connected to the network backbone and an area that is physically connected to the network backbone.

Product

PDSN

HA

GGSN

Privilege

Security Administrator, Administrator

Mode

Exec > Global Configuration > Context Configuration > OSPF Configuration

configure > context context_name > router ospf

Entering the above command sequence results in the following prompt:

[local]host_name(config-ospf)#

Syntax

Syntax Description

[ no ] area { ip_address | decimal_value } virtual-link router_id_address [ dead-interval dead_value ] [ hello-interval hello_value ] [ retransmit-interval rt_value ] [ transmit-delay td_value ]

no

Disables the area virtual link intervals.

ipaddress

Specifies the IP address of the area in IPv4 dotted-decimal notation.

decimal_value

Specifies the identification number of the transit area as an integer from 0 through 4294967295.

router_id_address

Specifies the router id of the ABR to be linked to in IPv4 dotted-decimal notation.

dead-interval dead_value

Specifies The 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. dead_value must be an integer from 1 through 65535.

hello-interval hello_value

Specifies the interval (in seconds) before sending a hello packet. hello_value must be an integer from 1 through 65535.

retransmit-interval rt_value

Specifies the interval (in seconds) that router should wait before retransmitting a packet. rt_value must be an integer from 1 through 3600.

transmit-delay td_value

Specifies the interval (in seconds) that the router should wait before transmitting a packet. td_value must be an integer from 1 through 3600.

Usage Guidelines

Use this command to set the intervals or delay types for a virtual link between an area that is connected to the network backbone and an area that cannot be connected to the network backbone.

Enables the use of MD5-based OSPF authentication for the virtual link between an area that cannot be physically connected to the network backbone and an area that is physically connected to the network backbone.

Product

PDSN

HA

GGSN

Privilege

Security Administrator, Administrator

Mode

Exec > Global Configuration > Context Configuration > OSPF Configuration

configure > context context_name > router ospf

Entering the above command sequence results in the following prompt:

[local]host_name(config-ospf)#

Syntax

Syntax Description

area { ip_address | decimal_value } virtual-link router_id_address message-digest-key key_id md5 { encrypted password encrypted__key | password password_key }
no  area { ipaddress | decimal_value } virtual-link router_id_address message-digest-key key_id 

no

Disables the area virtual link message digest key.

ip_address

Specifies the IP address of the transit area in IPv4 dotted-decimal notation.

decimal_value

Specifies the identification number of the transit area as an integer from 0 through 4294967295.

router_id_address

Specifies the router id of the ABR to be linked to in IPV4 dotted-decimal notation.

message-digest-key key_id

Specifies the key identifier number. key_id must be an integer from 1 through 255.

encrypted password encrypted_key

Specifies the use of an encrypted password. encrypted_key is an alphanumeric string of 1 through 523 characters.

Used this if you are pasting a previously encrypted authentication key into the CLI command.

password password_key

Specifies the password to use for authentication. password_key is an alphanumeric string from 1 through 16 characters that is entered in clear text format.

Usage Guidelines

Use this command to enable the use of MD5-based OSPF authentication for a virtual link between an area that is connected to the network backbone and an area that cannot be connected to the network backbone.

Enables or disables Bidirectional Forwarding Detection (BFD) on all OSPF interfaces.

Product

PDSN

HA

GGSN

Privilege

Security Administrator, Administrator

Mode

Exec > Global Configuration > Context Configuration > OSPF Configuration

configure > context context_name > router ospf

Entering the above command sequence results in the following prompt:

[local]host_name(config-ospf)#

Syntax

Syntax Description

[no] bfd-all-interfaces 

no

Disables BFD capability on all interfaces.

Usage Guidelines

Use this command to configure BFD on all OSPF interfaces. See the System Administration Guide for additional information on how to configure BFD.

Configures graceful-restart. By default, this capability is set to enabled.

Product

PDSN

HA

GGSN

Privilege

Security Administrator, Administrator

Mode

Exec > Global Configuration > Context Configuration > OSPF Configuration

configure > context context_name > router ospf

Entering the above command sequence results in the following prompt:

[local]host_name(config-ospf)#

Syntax

Syntax Description

[ no | default ] capability graceful-restart 

no

Disables the graceful-restart capability.

default

Enables the graceful-restart capability if it has been disabled.

Usage Guidelines

Use this command to configure graceful-restart.

Creates a default external route into an OSPF routing domain.

Product

PDSN

HA

GGSN

Privilege

Security Administrator, Administrator

Mode

Exec > Global Configuration > Context Configuration > OSPF Configuration

configure > context context_name > router ospf

Entering the above command sequence results in the following prompt:

[local]host_name(config-ospf)#

Syntax

Syntax Description

default-information originate
default-information originate [ always ] [ metric metric_value ] [ metric-type { 1 | 2 } ] [ route-map route_map_name ]
no default-information originate

no

Disables the default external route.

always

Always advertise the route regardless of whether or not the software has a default route.

metric metric_value

Sets the OSPF metric used in creating the default rout as an integer from 1 through 16777214.

metric-type { 1 | 2 }

Sets the default route metric type.

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

Specifies the name of the default route-map to be use as an alphanumeric string of 1 through 79 characters.

Usage Guidelines

Use this command to set the default external route into an OSPF routing domain.

Configures the default metric value for the OSPF routing protocol. All OSPF interfaces have a cost, which is a routing metric that is used in the link-state calculation. Routes with lower total path metrics are preferred over those with higher path metrics. When several equal-cost routes to a destination exist, traffic is distributed equally among them. The default metric is a global parameter that specifies the cost applied to all OSPF routes by default.

Product

PDSN

HA

GGSN

Privilege

Security Administrator, Administrator

Mode

Exec > Global Configuration > Context Configuration > OSPF Configuration

configure > context context_name > router ospf

Entering the above command sequence results in the following prompt:

[local]host_name(config-ospf)#

Syntax

Syntax Description

default-metric metric_value
no default-metric

metric-value

Sets the metric value expressed as an integer from 1 through 16777214. Default: 26385.

no

Enables or disables the default metric value for OSPF.

Usage Guidelines

Use this command to set the default metric for routes.

Configures the OSPF route administrative distances for all OSPF route types or based on specific route type. Administrative distance is the measure used by Cisco routers to select the best path when there are two or more different routes to the same destination from two different routing protocols. Administrative distance defines the reliability of a routing protocol. Each routing protocol is prioritized in order of most to least reliable (believable) using an administrative distance value. A lower numerical value is preferred.

Product

PDSN

HA

GGSN

Privilege

Security Administrator, Administrator

Mode

Exec > Global Configuration > Context Configuration > OSPF Configuration

configure > context context_name > router ospf

Entering the above command sequence results in the following prompt:

[local]host_name(config-ospf)#

Syntax

Syntax Description

[ no ] distance { distance_value | ospf { [ external distance_value ] [ inter-area distance_value ] [ intra-area distance_value ] } }

no

Disables the OSPF route administrative distances for all OSPF route types.

distance_value

Specifies the OSPF route administrative distances as an integer from 1 to 255. The default distance value is 110.

ospf { [ external distance_value ] [ inter-area distance_value ] [ intra-area distance_value ] }

Set the distance value for the specified route type.

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.

no

Enables or disables the specified option.

Usage Guidelines

Use this command to set the administrative distance for OSPF routes.

Enables or disables the filtering of networks in outgoing routing updates.

Product

PDSN

HA

GGSN

Privilege

Security Administrator, Administrator

Mode

Exec > Global Configuration > Context Configuration > OSPF Configuration

configure > context context_name > router ospf

Entering the above command sequence results in the following prompt:

[local]host_name(config-ospf)#

Syntax

Syntax Description

[ no ] distribute-list route_access_list out { connected | rip | static }

no

Disables the filtering of networks in outgoing routing updates.

route_access_list

Specifies the name of the OSPF route access list to use for filtering as an alphanumeric string of 1 through 63 characters.

connected

Filters connected routes.

rip

Filters RIP routes. (RIP is not supported at this time.)

static

Filters static routes.

no

Disables the specified option.

Usage Guidelines

Use this command to enable the filtering of outgoing route updates by using the specified route access list.

Exits the current configuration mode and returns to the Exec mode.

Product

All

Privilege

Security Administrator, Administrator

Syntax

Syntax Description

end

Usage Guidelines

Use this command to return to the Exec mode.

Exits the current mode and returns to the parent configuration mode.

Product

All

Privilege

Security Administrator, Administrator

Syntax

Syntax Description

exit

Usage Guidelines

Use this command to return to the parent configuration mode.

Configures the Virtual Routing and Forwarding (VRF) instances for OSPF routing protocol.

Product

All

Privilege

Security Administrator, Administrator

Mode

Exec > Global Configuration > Context Configuration > OSPF Configuration

configure > context context_name > router ospf

Entering the above command sequence results in the following prompt:

[local]host_name(config-ospf)#

Syntax

Syntax Description

[ no ] ip vrf vrf_name

no

Disables the VRF instances and removes the configured VRF context association for OSPF routing.

vrfvrf_name

Configures Virtual Routing & Forwarding (VRF) parameters.

vrf_name is name of a preconfigured VRF context configured in Context Configuration Mode via the ip vrf command. It is an alphanumeric string of 1 through 63 characters.

Usage Guidelines

Use this command to configure the IP VRF forwarding also to associate the preconfigured VRF context with the specific tunnel interface.

This command creates and enters the OSPF VRF Configuration Mode if required to configure the VRF context instances for OSPF routing.

Configures OSPF routers that interconnect to non-broadcast networks.

Product

PDSN

HA

GGSN

Privilege

Security Administrator, Administrator

Mode

Exec > Global Configuration > Context Configuration > OSPF Configuration

configure > context context_name > router ospf

Entering the above command sequence results in the following prompt:

[local]host_name(config-ospf)#

Syntax

Syntax Description

[ no ] neighbor  ip_address  [ poll-interval poll_interval_value ] [ priority priority_value ]

no

Disables OSPF routers that interconnect to non-broadcast networks.

ip_address

Specifies the interface IP address of the OSPF neighbor expressed using IPv4 dotted-decimal notation.

poll-interval poll_interval_value

Default: 120

Sets the number of seconds in the dead neighbor polling interval as an integer from 1 through 65535

priority priority_value

Default: 0

Sets the 8-bit number that represents the router priority value of the non-broadcast neighbor associated with the specified IP address. This must be an integer from 0 through 255. This keyword does not apply to point-to-multipoint interfaces.

Usage Guidelines

Use this command to configure OSPF routers that connect to non-broadcast networks.

Enables OSPF on an interface and defines the OSPF area for that network.

Product

PDSN

HA

GGSN

Privilege

Security Administrator, Administrator

Mode

Exec > Global Configuration > Context Configuration > OSPF Configuration

configure > context context_name > router ospf

Entering the above command sequence results in the following prompt:

[local]host_name(config-ospf)#

Syntax

Syntax Description

[ no ] network network_ip_address / network_mask area { area_id | area_ip_address }

no

Disables OSPF on an interface and defines the OSPF area for that network.

network_ip_address/network_mask

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).

area_id

Specifies the OSPF area identification number for the specified network as an integer from 0 through 4294967295.

area_ip_address

Specifies the IP address of the OSPF area for this network. This must be entered in IPv4 dotted-decimal notation.

Usage Guidelines

Use this command to specify the IP address of the network interface that the OSPF router will use.

Configures OSPF graceful-restart settings.

Product

PDSN

HA

GGSN

Privilege

Security Administrator, Administrator

Mode

Exec > Global Configuration > Context Configuration > OSPF Configuration

configure > context context_name > router ospf

Entering the above command sequence results in the following prompt:

[local]host_name(config-ospf)#

Syntax

Syntax Description

ospf graceful-restart { grace-period grace_period  | helper { never | policy { only-reload | only-upgrade } } }

grace-period grace-period

Specifies the OSPF graceful restart grace period (in seconds) as an integer from 1 through 1800. Default grace period is 60 seconds.

helper { never | policy { only-reload | only-upgrade } }

Helps configure OSPF helper settings.

never: Do not allow helper mode.

Default is ospf graceful-restart grace-period.

Usage Guidelines

Use this command to configure graceful-restart specific settings.

This command configures the router ID for the OSPF process.

Product

PDSN

HA

GGSN

Privilege

Security Administrator, Administrator

Mode

Exec > Global Configuration > Context Configuration > OSPF Configuration

configure > context context_name > router ospf

Entering the above command sequence results in the following prompt:

[local]host_name(config-ospf)#

Syntax

Syntax Description

[ no ] ospf router-id  ip_address

no

Disables the router ID for the OSPF process.

router-id ip_address

Specifies the router ID for the OSPF process. ip_address is entered using IPv4 dotted-decimal notation.

Usage Guidelines

Use this command to set the router ID for the current OSPF router process.

Enables or disables the suppression of OSPF routing updates on the specified interface.

Product

PDSN

HA

GGSN

Privilege

Security Administrator, Administrator

Mode

Exec > Global Configuration > Context Configuration > OSPF Configuration

configure > context context_name > router ospf

Entering the above command sequence results in the following prompt:

[local]host_name(config-ospf)#

Syntax

Syntax Description

[ no ] passive-interface interface_name

no

Disables the name assigned to a logical interface within the specific context.

interface_name

Specifies the name assigned to a logical interface within the specific context as an alphanumeric string of 1 through 79 characters.

Usage Guidelines

Use this command to suppress router updates on an interface in the current context.

Redistributes routes from other protocols to OSPF neighbors using the OSPF protocol.

Product

PDSN

HA

GGSN

Privilege

Security Administrator, Administrator

Mode

Exec > Global Configuration > Context Configuration > OSPF Configuration

configure > context context_name > router ospf

Entering the above command sequence results in the following prompt:

[local]host_name(config-ospf)#

Syntax

Syntax Description

redistribute { connected | rip | static } [ metric metric_value ] [ metric-type { 1 | 2 } ] [ route-map route_map_name ]
no redistribute { connected | rip | static } 

no

Disables the redistributed routes.

connected

Redistributes connected routes.

rip

Specifies that RIP routes will be redistributed. (RIP is not supported at this time.)

static

Redistributes static routes.

metric metric_value

Sets the OSPF metric used in the redistributed route. This must be an integer from 1 through 16777214.

metric-type { 1 | 2 }

Default: 2

Sets route metric type that is applied to redistributed routes.

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.

Usage Guidelines

Use this command to define what routing protocols should have their routes redistributed into OSPF.

Adjusts settings for the OSPF refresh timer.

Product

PDSN

HA

GGSN

Privilege

Security Administrator, Administrator

Mode

Exec > Global Configuration > Context Configuration > OSPF Configuration

configure > context context_name > router ospf

Entering the above command sequence results in the following prompt:

[local]host_name(config-ospf)#

Syntax

Syntax Description

[ no ] refresh  timer value

no

Disables the refresh timer.

value

Default: 10

Specifies the minimum amount of time (in seconds) to wait before refreshing a Link-state Advertisement (LSA). This must be an integer from 10 through 1800.

Usage Guidelines

Use this command to define the amount of time to wait before refreshing an LSA.

Configures the router ID for the OSPF process.

Product

PDSN

HA

GGSN

Privilege

Security Administrator, Administrator

Mode

Exec > Global Configuration > Context Configuration > OSPF Configuration

configure > context context_name > router ospf

Entering the above command sequence results in the following prompt:

[local]host_name(config-ospf)#

Syntax

Syntax Description

[ no ] router-id ip_address

no

Disables the router ID for the OSPF process.

Specifies the router ID for the OSPF process in IPv4 dotted-decimal notation.

Usage Guidelines

Use this command to set the router ID for the current OSPF router process.

Sets the Shortest Path First (SPF) timers.

Product

PDSN

HA

GGSN

Privilege

Security Administrator, Administrator

Mode

Exec > Global Configuration > Context Configuration > OSPF Configuration

configure > context context_name > router ospf

Entering the above command sequence results in the following prompt:

[local]host_name(config-ospf)#

Syntax

Syntax Description

timers spf delay_value hold_time_value
no timers spf

no

Disables SPF timers.

delay_value

Default: 5

Specifies the delay time (in seconds) between receiving changes to an SPF calculation. This must be an integer from 0 through 4294967295.

hold_time_value

Default: 10

Specifies the hold time (in seconds) between consecutive SPF calculations. This must be an integer from 0 through 4294967295.

Usage Guidelines

Use this command to set the SPF delay and hold timers for the current OSPF router process.