OSPF

This section describes the configuration options for the Open Shortest Path First (OSPF) routing protocol.

OSPF (Open Shortest Path First) is an Interior Gateway Protocol used to distribute routing information within a single Autonomous System. Routers use link-state algorithms to send routing information to all nodes in an inter-network by calculating the shortest path to each node based on topography of the Internet constructed by each node. Each router sends that portion of the routing table (keeps track of routes to particular network destinations), which describes the state of its own links, and it also sends the complete routing structure (topography).

The advantage of shortest path first algorithms is that they result in smaller more frequent updates everywhere. They converge quickly, thus preventing such problems as routing loops and Count-to-Infinity (when routers continuously increment the hop count to a particular network). This makes for a stable network.

To access OSPF screens, go to Layer 3 Management > OSPF.

OSPF VRF Creation

By default, the tab OSPF VRF Creation displays OSPF VRF Creation screen.

Figure 1. OSPF VRF Creation


Screen Objective This screen allows the user to enable or disable OSPF for the specified VRF instance.
Navigation

Layer 3 Management > OSPF > OSPF VRF Creation

Fields
  • VRF Name—default.
  • VRF Status—select the admin status of OSPF virtual context. The default option is Disabled. The list contains:
    • Enabled—enables OSPF in the virtual context.
    • Disabled—disables OSPF in the virtual context.
Buttons
  • Add—adds and saves new configuration.
    Note:

    Status cannot be disabled using this option.

  • Delete—delete the selected entry.
    Note:

    Entry can be deleted only when the VRF status is configured as disabled.

Debug Trace Settings

Figure 2. Debug Trace Settings


Screen Objective This screen allows the user to set the debug trace level.
Navigation

Layer 3 Management > OSPF > OSPF VRF Creation

Click Debug Trace Settings.

Fields
  • Trace Level—select the level of trace required for OSPF. The list contains:
    • High-Level-Trace—generates debug statements for Packet High Level Dump trace.
    • Low-level-Trace—generates debug statements for Packet Low Level Dump trace.
    • Hex-Dump-Trace—generates debug statements for Packet Hex Dump trace.
    • Critical-Trace—generates debug statements for Critical trace.
    • Func-entry-Trace—generates debug statements for Function Entry trace.
    • Func-exit-Trace—generates debug statements for Function Exit trace.
    • Memory-Success-Trace—generates debug statements for Memory Allocation Success Trace.
    • Memory-Failure-Trace—generates debug statements for Memory Allocation Failure Trace.
    • Hello-pkt—generates debug statements for Hello packet Trace.
    • DDP—generates debug statements for DDP packet Trace.
    • LRQ—generates debug statements for Link State Request Packet Trace.
    • LSU—generates debug statements for Link State Update Packet Trace.
    • LS-ACK—generates debug statements for Link State Acknowledge Packet Trace.
    • ISM—generates debug statements for Interface State Machine Trace.
    • NSM—generates debug statements for Neighbor State Machine Trace.
    • RTC-TRACE—generates debug statements for Routing Table Calculation Trace.
    • RTM Module-Trace—generates debug statements for RTM Module Trace.
    • Interface-Trace—generates debug statements for Interface Trace.
    • NSSA Trace—generates debug statements for NSSA Trace.
    • Route-aggregation Trace—generates debug statements for Route Aggregation Trace.
    • Configuration-Trace—generates debug statements for Configuration Trace.
Fields (cont)
  • Trace Level—the list contains (cont):
    • Adjacency—generates debug statements for Adjacency formation Trace.
    • LSDB—generates debug statements for Link State Database Trace (LSDB).
    • Protocol pkt processing—generates debug statements for Protocol Packet Processing Trace.
Buttons
  • Add—modifies attributes for the selected entry and saves the changes.

OSPF Basic Settings

Figure 3. OSPF Basic Settings


Screen Objective This screen allows the user to configure the basic settings of OSPF.
Navigation

Layer 3 Management > OSPF > Basic Settings

Fields
  • Select—click to choose the Context Name for which configuration needs to be modified or deleted.
  • Context Name—default.
  • Router ID—enter a 32-bit integer that uniquely identifies the originating router in the AS.
  • Autonomous System Border Router/ Autonomous System—select the status of an ASBR (AS Border Router). The default option is Yes. The list contains:
    • Yes—configures the router as an ASBR.
    • No—configures the router within AS.
  • RFC 1583 Compatibility—select the compatibility status of RFC 1583 or RFC 2178. This controls the preference rules, when choosing among multiple AS external LSAs advertising the same destination. The default option is Yes. The list contains:
    • Yes—sets the preference rules to those specified by the RFC 1583.
    • No—sets the preference rules to those specified by the RFC 2178.
  • NSSA ASBR Default Route Translator/ NSSA ASBR Default Route—select the status of the P-Bit setting for the default Type-7 LSA (Link State Advertisement) generated by NSSA internal ASBR, which is not ABR (Area Border Router)). The default option is Disabled. The list contains:
    • Enabled—sets the P-Bit in the generated Type-7 default LSA.
    • Disabled—clears the P-Bit in the generated default LSA.
  • ABR Type—select the type of ABRs supported. The default option is Standard. The list contains:
    • Standard—chooses the ABR type as Standard.
    • CISCO— chooses the ABR type as CISCO.
    • IBM— chooses the ABR type as IBM.
  • Distance—enter the administrative distance (the metric to reach destination) of the routing protocol. This value ranges from 1 to 255. The default value is 0. The value 0 represents the directly connected route.
    Note:

    The administrative distance can be enabled for only one route map. The distance should be disassociated from the already associated route map if distance needs to be associated for another route map.

  • Default Information—enter the default information that is to be used for configuring the OSPF basic settings. This value ranges from 0 to 65535.
Fields (cont)
  • SPF Delay—configures the interval by which SPF calculation is delayed after a topology change reception. This value ranges from 0 to 65535 seconds. The default value is 1.
  • SPF Hold Time—configures the minimum time between two consecutive SPF calculations. This value ranges from 0 to 65535 seconds. The default value is 10.
  • Trace Level—select the level of trace required for OSPF. The list contains:
    • Packet High Level Dump Trace—generates debug statements for Packet High Level Dump trace.
    • Packet Low Level Dump Trace—generates debug statements for Packet Low Level Dump trace.
    • Packet Hex Dump Trace—generates debug statements for Packet Hex Dump trace.
    • Critical Trace—generates debug statements for Critical trace.
    • Function Entry Trace—generates debug statements for Function Entry trace.
    • Function Exit Trace—generates debug statements for Function Exit trace.
    • Memory Allocation Success Trace—generates debug statements for Memory Allocation Success Trace.
    • Memory Allocation Failure Trace—generates debug statements for Memory Allocation Failure Trace.
    • Hello packet Trace—generates debug statements for Hello packet Trace.
    • DDP packet Trace—Generates debug statements for DDP packet Trace.
    • Link State Request Packet Trace—generates debug statements for Link State Request Packet Trace.
    • Link State Update Packet Trace—generates debug statements for Link State Update Packet Trace.
    • Link State Acknowledge Packet Trace—generates debug statements for Link State Acknowledge Packet Trace.
    • Interface State Machine Trace—generates debug statements for Interface State Machine Trace.
    • Neighbor State Machine Trace—generates debug statements for Neighbor State Machine Trace.
    • Routing Table Calculation Trace—generates debug statements for Routing Table Calculation Trace.
    • RTM Module Trace—generates debug statements for RTM Module Trace.
Fields (cont)
  • Trace Level—the list contains (cont):
    • Interface Trace—generates debug statements for Interface Trace.
    • NSSA Trace—generates debug statements for NSSA Trace.
    • Route Aggregation Trace—generates debug statements for Route Aggregation Trace.
    • Configuration Trace—generates debug statements for Configuration Trace.Adjacency formation Trace—generates debug statements for Adjacency formation Trace.Link State Database Trace—Generates debug statements for Link State Database Trace.
    • Protocol Packet Processing Trace—generates debug statements for Protocol Packet Processing Trace.
  • GR Trace-Level—select the graceful restart trace level for OSPF. The list contains:
    • Restarting-router—generates debug statements for messages related to restarting router.
    • Helper—generates debug statements for messages related to router in helper Mode.
    • Redundancy—generates debug statements for redundancy messages.
Buttons
  • ADD—adds and saves new configuration.
  • Apply—modifies attributes for the selected entry and saves the changes
  • Delete—delete the selected entry.

OSPF Area Configuration

Figure 4. OSPF Area Configuration


Screen Objective This screen allows the user to configure the parameters of the router’s attached areas.
Navigation

Layer 3 Management > OSPF > Area

Fields
  • Context Name—default.
  • Area ID—enter the IP Address that uniquely identifies an area that is associated with the OSPF address range for which authentication is to be enabled.
  • Type—select the required type for an area. The default option is Normal. The list contains:
    • Normal—allows all external LSAs (Type 5 LSA) to be flooded through the area.
    • Stub—does not allow the external LSA to be flooded into the area.
    • NSSA—allows only limited number of Type 5 external LSA to be translated into Type 7 LSA and flooded into the area.
  • Metric / Stub Metric—enter the metric value applied at the indicated type of service. This is applicable to stub and NSSA area. This value ranges from 0 to 16777215. The default value is 10.
    Note:

    This field is enabled only when Type is set as “NSSA” and Send Summary routers is set as “Yes”.

  • Metric Type/ Stub Metric Type—select the type of metric advertised as a default route. This is applicable to stub and NSSA area. The default option is ospfMetric. The list contains:
    • ospfMetric—sets the metric type as ospfMetric.
    • comparableCost—sets the metric type as comparable cost.
    • nonComparable—sets the metric type as noncomparable.
    Note:

    This field is enabled only when Type is set as “NSSA” and Send Summary routers is set as “Yes”.

  • Type of Service / TOS—enter the type of service associated with the metric. This is applicable to stub and NSSA area. The default value is 0.
    Note:

    This field is enabled only when Type is set as “NSSA” and Send Summary routers is set as “Yes”.

  • Translator Role—select an NSSA border router’s ability to perform NSSA translation of Type-7 LSAs to Type-5 LSAs. The default option is Candidate. The list contains:
    • Always—sets the translator role as always to perform NSSA translation of Type-7 LSAs to Type-5 LSAs.
    • Candidate—sets the translator role as candidate to perform NSSA translation of Type-7 LSAs to Type-5 LSAs
  • NSSA Translator Stability Interval/ Stability Interval—enter the number of seconds after which an elected translator determines that its services are no longer required. This value ranges from 0 to 2147483647. The default option is 40 seconds.
  • SPF Run Count—displays the shortest path first (SPF) run count. The Run Count depends upon the metric type value. This value ranges from 0 to 65535. This field is greyed out.
Buttons
  • ADD—adds and saves new configuration.
  • Reset—resets to default value for respective fields and discards all user inputs.
  • Apply—modifies attributes for the selected entry and saves the changes
  • Delete—delete the selected entry.
Note:

An auto generated entry cannot be deleted.

OSPF Interface Configuration

Figure 5. OSPF Interface Configuration


Screen Objective This screen allows the user to configure an OSPF for the specified interface.
Navigation

Layer 3 Management > OSPF > Interface

Fields
  • Select—choose the context name for the OSPF Interface configuration.
  • Context Name—default.
  • Interface—select the interface index of the port which are already configured.
    Note:

    VLAN interface should be created in Layer 3 Management->IP->VLAN Interface Basic settings.

  • Area ID—enter the IP Address that uniquely identifies an area that is associated with the OSPF address range for which authentication is to be enabled.
  • Priority—enter the priority of the interface, which is used in the DR (Designated Router) election algorithm. When two routers attached to a network attempt to become the designated router, the one with the higher router priority takes precedence. If there is a tie, the router with the higher router ID takes precedence. This value ranges from 0 to 255. The default value is 1.
  • Authentication Type—enter the type of authentication used on the interface. The default option is None. The list contains:
    • None—sets the authentication type as no password authentication.
    • Simple Password—sets the authentication type as Simple password type authentication.
    • MD5—sets the authentication type as Message Digest 5 based authentication.
    • SHA-1—sets the authentication type as Secure Hash Algorithm 1 (SHA1) authentication. SHA1 generates Authentication digest of length 20 bytes.
    • SHA-224—sets the authentication type as Secure Hash Algorithm 224 (SHA224) authentication. SHA224 generates Authentication digest of length 28 bytes.
    • SHA-256—sets the authentication type as Secure Hash Algorithm 256 (SHA256) authentication. SHA256 generates Authentication digest of length 32 bytes.
    • SHA-384—sets the authentication type as Secure Hash Algorithm 384 (SHA384) authentication. SHA384 generates Authentication digest of length 48 bytes.
    • SHA-512—sets the authentication type as Secure Hash Algorithm 512 (SHA512) authentication. SHA512 generates Authentication digest of length 64 bytes.
Fields (cont)
  • MD5 Key ID—enter the secret key used to create the message digest appended to the OSPF packet if the authentication type is MD5. This value ranges from 0 to 255.
    Note:

    This field is inactive when the authentication type is None and Simple Password

  • Authentication Key—enter the key required for authentication, if authentication is enabled on this interface.
    Note:

    This field is inactive when the authentication type is None.

  • Metric—enter the metric of using the type of service on the interface. This value ranges from 1 to 65535. The default value is 10.
  • Passive—select the interface as passive or normal. The default option is No. The list contains:
    • Yes—sets the interface as passive.
    • No—sets the interface as normal.
  • Demand Circuit—select the Demand OSPF procedures that should be performed on this interface. The default option is No. The list contains:
    • No—demand OSPF procedures do not perform on the selected interface
    • Yes—demand OSPF procedures perform on the selected interface.
    Note:

    On point-to-point interfaces, only one end of the demand circuit must be configured

  • If Type—select the OSPF interface type. The default option is broadcast. The list contains:
    • Broadcast—specifies that the network supports many (more than two) attached routers and has the capability to address a single physical message to all of the attached routers (broadcast)
    • nbma—specifies that the network supports many (more than two) routers but has no broadcast capability
    • point-to-point—sets the network topology to point-to-point type; this type displays a network of exactly two routers.
    • point-to-multipoint—sets the network type to point-to-multipoint and treats the non-broadcast network as a collection of point-to-point links.
  • Transit Delay—enter the number of seconds taken to transmit a link state update packet over the interface. This value ranges from 0 to 3600 seconds. The default option is 1 second.
  • Retransmit Interval—enter the number of seconds between link-state advertisement retransmissions, for adjacencies belonging to the interface. The retransmit-interval value is also used while retransmitting database description and link-state request packets. This value ranges from 0 to 3600 seconds. The default option is 5.
Fields (cont)
  • Hello Interval—enter the length of time, in seconds, between the OSPFv3 hello packets to a particular interface (i.e. the length of time, in seconds, between the Hello packets that the router sends to the interface). This value ranges from 1 to 65535 seconds. The default option is 10.
  • Dead Interval—enter the time period for which the router waits for hello packet from the neighbor before declaring this neighbor down. This value ranges from 0 to 2147483647 seconds. The default option is 40.
  • IP Address—displays the IP Address of the OSPF interface. This is a read-only field.
  • Designated Router—displays the IP Address of the Designated Router (DR). This is a read-only field.
Buttons
  • Add—adds and saves new configuration.
  • Reset—resets to default value for respective fields and discards all user inputs.
  • Apply—modifies attributes for the selected entry and saves the changes
  • Delete—delete the selected entry.

OSPF Virtual Interface Configuration

Figure 6. OSPF Virtual Interface Configuration


Screen Objective This screen allows the user to configure an OSPF virtual link and its parameters.
Note:

In OSPF, all areas must be connected to a backbone area. If the connection to the backbone is lost, it can be repaired by establishing a virtual link. Hello-interval and dead-interval values must be the same for all routers and access servers on a specific network.

Navigation

Layer 3 Management > OSPF > Virtual Interface

Fields
  • Select—click to choose the context name for which the OSPF Interface configuration needs to be done.
  • Context Name—default.
  • Transit Area ID—enter the 32-bit integer uniquely identifying an area, which is traversed by the virtual link
    Note:

    Area ID 0.0.0.0 is used for the OSPF backbone.

  • Neighbor Router ID—enter the router ID of the virtual neighbor.
  • Authentication Type—select the type of authentication used on the interface. The default option is None. The list contains:
    • None—sets the authentication type as no password authentication.
    • Simple Password—sets the authentication type as Simple password type authentication.
    • MD5—sets the authentication type as Message Digest 5authentication.
    • SHA-1—sets the authentication type as Secure Hash Algorithm 1 (SHA1) authentication. SHA1 generates Authentication digest of length 20 bytes.
    • SHA-224—sets the authentication type as Secure Hash Algorithm 224 (SHA224) authentication. SHA224 generates Authentication digest of length 28 bytes.
    • SHA-256—sets the authentication type as Secure Hash Algorithm 256 (SHA256) authentication. SHA256 generates Authentication digest of length 32 bytes.
    • SHA-384—sets the authentication type as Secure Hash Algorithm 384 (SHA384) authentication. SHA384 generates Authentication digest of length 48 bytes.
    • SHA-512—sets the authentication type as Secure Hash Algorithm 512 (SHA512) authentication. SHA512 generates Authentication digest of length 64 bytes.
  • MD5 Key ID—enter the secret key used to create the message digest appended to the OSPF packet if the authentication type is md5. This value ranges from 1 to 255.
    Note:

    This field is inactive when the authentication type is None and Simple Password.

  • Authentication Key—enter the key required for authentication, if authentication is enabled on this interface.
    Note:

    This field is inactive when the authentication type is None.

Fields (cont)
  • Hello Interval—enter the length of time, in seconds, between the Hello packets send on the interface. This value ranges from 1 to 65535 seconds. The default option is 10.
  • Router Dead Interval—enter the time period for which the router waits for hello packet from the neighbor before declaring this neighbor down. This value ranges from 0 to 2147483647 seconds. The default option is 40.
  • Transit Delay—enter the number of seconds taken to transmit a link state update packet over the interface. This value ranges from 0 to 3600 seconds. The default option is 1 second.
  • Retransmit Interval—enter the number of seconds between link-state advertisement retransmissions, for adjacencies belonging to the interface. This value ranges from 0 to 3600 seconds. The default option is 5.
Buttons
  • Add—adds and saves new configuration.
  • Reset—resets to default value for respective fields and discards all user inputs.
  • Apply—modifies attributes for the selected entry and saves the changes
  • Delete—delete the selected entry.

OSPF Neighbor Configuration

Figure 7. OSPF Neighbor Configuration


Screen Objective This screen allows the user to configure the neighbor router and its priority.
Note:

Neighbor configuration can be configured only on NBMA or Point-to-Multipoint networks. These networks can be configured using the Layer 3 Management > OSPF > Interface > OSPF Interface Configuration

Navigation

Layer 3 Management > OSPF > Neighbor

Fields
  • Context Name—default
  • Neighbor IP Address—enter the Neighbour IP address. The priority of the neighbor is defined by the Neighbor router ID
  • Priority / Neighbor Priority—enter the priority of the neighbor in the designated router election algorithm. This value ranges from 0 to 255. The default value is 1. A value of 0 signifies that the neighbor is not eligible to become a designated router on this particular network.
Buttons
  • Add—adds and saves new configuration.
  • Reset—resets to default value for respective fields and discards all user inputs.
  • Apply—modifies attributes for the selected entry and saves the changes
  • Delete—delete the selected entry.

OSPF RRD Route Configuration

Figure 8. OSPF RRD Route Configuration


Screen Objective This screen allows the user to configure the neighbor router and its priority.
Note:

Neighbor configuration can be configured only on NBMA or Point-to-Multipoint networks. These networks can be configured using the Layer 3 Management > OSPF > Interface > OSPF Interface Configuration

Navigation

Layer 3 Management > OSPF > Redistribution Route

Fields
  • Context Name—default
  • Destination Network—enter the IP address of the destination route
  • Network Mask—enter the mask for the given destination route.
  • Route Metric / Metric—enter the metric value applied to the route before it is advertised into the OSPF domain. This value ranges from 1 to 16777215. The default value is 10.
  • Route Metric Type / Metric Type—select the metric type applied to the route before it is advertised into the OSPF domain. The default option is asexttype2. The list contains:
    • asexttype1—sets the route metric type as AS-External type 1 before it is advertised.
    • asexttype2—sets the route metric type as AS-External type 2 before it is advertised.
  • Route Tag—sets the tag type which describes whether tags will be automatically generated or will be manually configured. This value ranges from 0 to 4294967295. The default value is 0.
Buttons
  • Add—adds and saves new configuration.
  • Reset—resets to default value for respective fields and discards all user input.
  • Apply—modifies attributes for the selected entry and saves the changes
  • Delete—delete the selected entry.

OSPF Area Aggregation

Figure 9. OSPF Area Aggregation


Screen Objective This screen allows the user to configure the External Tag for configured Type-7 address ranges.
Navigation

Layer 3 Management > OSPF > Aggregation

Fields
  • Context Name—default
  • Area ID—enter the 32-bit integer uniquely identifying the area in which the address aggregate is to be found
  • Lsdb Type—select the Lsdb type of the address aggregate. The default option is summaryLink. The list contains:
    • summaryLink—sets the LSA type as summary LSA
    • nssaExternalLink—sets the LSA type as NSSA external Link
  • Network—enter the IP address of the network that enables the OSPF routing for interfaces defined and removing the area ID of that interface. When a more specific OSPF network range is removed, interfaces belonging to that network range will be retained and remain active if and only if a less specific network range exists.
  • Mask—enter the Subnet Mask that pertains to the Net or Subnet for the given destination IPv4 address.
  • Advertise—select whether the subnets are advertised outside the area or not. The default option is advertiseMatching. The list contains::
    • advertiseMatching—allows the subnets subsumed by ranges to trigger the advertisement of the indicated aggregate
    • doNotAdvertiseMatching—does not advertise subnets outside the area
  • External Tag—enter the External Tag of the external route. This tag is used to communicate information between AS boundary routers. The default value is 0.
Buttons
  • Add—adds and saves new configuration.
  • Reset—resets to default value for respective fields and discards all user input.
  • Apply—modifies attributes for the selected entry and saves the changes
  • Delete—delete the selected entry.

OSPF AS External Area Aggregation

Figure 10. OSPF AS External Area Aggregation


Screen Objective This screen allows the user to configure the Type-5 / Type-7 address ranges specifying whether for the configured range, Type-5 / Type-7 LSA will be aggregated or not.
Navigation

Layer 3 Management > OSPF > AS Ext Aggregation

Fields
  • Context Name—default
  • Network—enter the IP address of the network that enables the OSPF routing for interfaces defined and removing the area ID of that interface. When a more specific OSPF network range is removed, interfaces belonging to that network range will be retained and remain active if and only if a less specific network range exists.
  • Mask—enter the Subnet Mask for the given destination IPv4 address
  • Area ID—enter the identifier of the area about which routes are to be summarized. It can be specified as either a decimal value or as an IP address.
  • Aggregation Effect /Advertise—select whether Type-5/Type-7 will be aggregated or not. The default option is advertise. The list contains:
    • advertise—generates aggregated Type-5 if the associated Area ID is 0.0.0.0; generates aggregated Type-7 in the corresponding NSSA area if Area ID is other than 0.0.0.0
    • doNotAdvertise—generates aggregated Type-7 in all attached NSSA areas if the associated Area ID is 0.0.0.0. Does not generate aggregated Type-7 in the corresponding NSSA area if the Area ID is other than 0.0.0.0
    • allowAll—generates aggregated Type-5 for the specified range and generates aggregated Type-7 in all attached NSSA areas only if the associated Area ID is 0.0.0.0. This allowAll option is not valid for Area ID other than 0.0.0.0.
    • denyAll—does not generate Type-5 or Type-7 for the specified range. This option is not valid for Area ID other than 0.0.0.0
Fields (cont)
  • Translation—select the P Bit setting in the generated Type-7 LSA. The default option is enabled. The list contains:
    • enabled—sets P Bit in the generated Type-7 LSA.
    • disabled—clears the P Bit in the generated Type-7 LSA.
Buttons
  • Add—adds and saves new configuration.
  • Reset—resets to default value for respective fields and discards all user input.
  • Apply—modifies attributes for the selected entry and saves the changes
  • Delete—delete the selected entry.

Graceful Restart Settings

Figure 11. Graceful Restart Settings


Screen Objective This screen allows the user to configure Graceful Restart for OSPF. The Graceful Restart feature allows forwarding of data packets to continue along known routes, while the routing protocol information is being restored following a processor switchover.
Navigation

Layer 3 Management > OSPF > Graceful Restart Settings

Fields
  • Context Name—default
  • Opaque Option—select the opaque-capable option. The default option is Disable. The list contains:
    • Enable—enables the opaque-capable option.
    • Disable—disables the opaque-capable option.
  • Restart Support—select the router support for the OSPF Graceful Restart feature. The default option is None. The list contains:
    • None—does not restart support of the OSPF Graceful Restart feature.
    • Planned Only—restarts support of the OSPF Graceful Restart feature only in planned state.
    • Planned and Unplanned—restarts of the OSPF graceful restart feature both in planned and unplanned state.
    Note:

    This option is enabled only when opaque option is enabled.

  • Restart Grace LSA Ack—select whether the Grace LSAs sent by the router are expected to be acknowledged by the peers if the Grace Ack Required state is enabled. The default option is Enable. The list contains:
    • Enable—Grace LSAs sent by the router are acknowledged by the peers.
    • Disable—Grace LSAs sent by the router are not acknowledged.
    Note:

    This option is enabled only when opaque option is enabled.

  • Grace LSA Retransmit Count—enter the number of retransmissions for unacknowledged Grace LSAs. This value ranges from 0 to 180. The default value is 2.
    Note:

    This option is enabled only when opaque option is enabled.

  • Restart Interval—enter the OSPF Graceful Restart timeout interval. This value specifies the Graceful Restart interval, in seconds, during which the restarting router has to reacquire OSPF neighbors that are fully operational prior to the Graceful Restart. This value ranges from 1 to 1800. The default is 120.
    Note:

    This option is enabled only when opaque option is enabled.

  • Restart Reason—select the router Restart Reason code of the OSPF graceful restart feature. The default option is Unknown. The list contains:
    • UnKnown—restarts the system due to unplanned events (such as restarting after a crash).
    • S/W Restart—restarts the system due to software restart.
    • S/W Reload UpGrade—restarts system due to reloading / upgrading of software.
    • Switch to Redundant—restarts system due to switch over to a redundant support processor.
    Note:

    This option is enabled only when opaque option is enabled.

Fields (cont)
  • Helper Support—select an opaque-capable option. The default option is Disable. The list contains:
    • UnKnown—sets the Helper Support for restarting of system due to unplanned events (such as restarting after a crash).
    • S/W Restart—sets the Helper Support for restarting of system due to restart of software.
    • S/W Reload UpGrade—sets the Helper Support for restarting of system due to reload or upgrade of software.
    • Switch to Redundant—sets the Helper Support for restarting of system due to switch over to a redundant support processor.
  • Helper Strict LSA Checking—select whether strict LSA checking is enabled for Graceful Restart. The default option is False. The list contains:
    • True—strict LSA checking is enabled for the Graceful Restart.
    • False—strict LSA checking is disabled for the Graceful Restart.
    Note:

    This option is enabled only when opaque option is enabled.

  • Helper Grace Time Limit—enter the OSPF Graceful Restart interval limit, in seconds, in the helper side. During this period, the router advertises that the restarting router is active and is in FULL state. This value ranges from 0 to 1800 seconds. The default option is 0.
    Note: This option is enabled only when the Opaque Option is enabled.
Buttons
  • Apply—modifies attributes for the selected entry and saves the changes