Default OSPF Parameters lists OSPF parameters and their default values.
Default OSPF Parameters
| Parameter | Description | Default Value |
|---|---|---|
| router ID | Provides for the identification of one router to another and helps establish adjacencies among OSPF routers. | highest loopback IP address or highest configured VLAN IP address if no loopback configuration exists |
| interface cost | An outbound interface value used in determining which routing interface should forward when more than one routing interface is available. | 10 |
| interface priority | A value placed on the interface that helps in determining which router will be elected designated router. | 1 |
| interface network type | Specifies the type of network an interface is connecting to. | broadcast |
| LSA Thresholds | Specifies: | |
| The number of LSA updates that force a full routing calculation | 4294967295 Update starts | |
| The number of LSA updates that interrupt and restart a full routing calculation | 4294967295 Update restarts | |
| The number of LSA inter-area/external updates that force a full routing calculation | 50 Inter-area/external updates | |
| The number of intra updates that force a full routing calculation | 0 Intra updates | |
| LSA Pause Frequency | Specifies the number of cpu units SPF calculation runs before pausing. | 10000 |
| SPF delay timer | Specifies the amount of time between receiving an OSPF update and the start of an SPF calculation. | 5 seconds |
| retransmit interval | A timer that determines the retransmission of LSAs in order to ensure reliable flooding. | 5 seconds |
| transmit delay | Specifies the number of seconds it takes to transmit a link state update packet over this interface. | 1 second |
| hello interval | The period between transmissions of hello packet advertisements. |
|
| dead interval | The period that can elapse without receiving a router‘s hello packets before its neighbors will declare it down. | 40 seconds |
| distance | Specifies the administrative distance for OSPF routes. The available protocol with the lowest administrative distance is chosen for this route. | connected: 0
static: 1
BGP (S-, 7100-Series):
OSPF = 110 RIP = 120 |
| graceful restart | Provides for an OSPF router to remain on the forwarding path during a restart of its OSPF software. | disabled |
| graceful restart restart interval | Specifies the maximum time in seconds after which the graceful restart will terminate should it not complete or terminate for other reasons within the interval. | 120 seconds |
| PE-CE Protocol | Enables the Customer Edge (CE) router as a Provider Edge (PE) router peers. | disabled |
Configuring Basic OSPFv3 Parameters describes how to configure basic OSPF parameters.
Configuring Basic OSPFv3 Parameters
| Step | Task | Command(s) |
|---|---|---|
| 1 | Create an OSPF routing instance in router configuration mode. | ipv6 router ospf process-id |
| 2 | In interface configuration mode, enable OSPFv3 on each routing interface, specifying the OSPFv3 process, area, and optional instance | ipv6 ospf process area area [instance instance-id] |
| 3 | Optionally, in interface configuration mode, configure an IPv6 address for all routing interfaces in the AS. | ipv6 address {link-local-address link-local | ipv6-address/length | ipv6-prefix/length eui-64 | autoconfig | general-prefix sub-bits/length} |
Configuring OSPFv3 General Optional Parameters describes how to configure basic OSPFv3 parameters.
Configuring OSPFv3 General Optional Parameters
| Task | Command(s) |
|---|---|
| Optionally, change the OSPFv3 router ID for this device. | router-id router-id |
| Optionally, enable the OSPF PE-CE protocol. | enable-pe-ce |
| Optionally, configure the OSPF VRF domain ID. | domain-id [secondary] type type value value |
| Optionally, change the SPF LSA thresholds for this router. | spf lsa-thresholds num-start num-restart num-intra-full num-ia-ext-full |
| Optionally, change the SPF pause frequency to specify the number of units SPF calculation runs before pausing. | spf pause-frequency units |
| Optionally, change the delay, in milliseconds, between the receipt of an update and the beginning of the SPF execution. | timers spf spf-delay |
| Optionally, enable BFD on all OSPF interfaces (S-, K-Series). | bfd all-intfs-on |
| Optionally, change the administrative distance for OSPFv3 routes. | distance [ospf {external | intra-area}] weight |
| Optionally, define the range of addresses used by this Area Border Router (ABR) when communicating routes to other areas. | area area-id range ipv6-address [not-advertise] |
| Optionally, configure an area as a stub area. | area area-id stub [no-summary] |
| Optionally, set the cost for the default route that is sent into a stub area by an ABR. | area area-id default-cost cost |
| Optionally, configure an area as a not so stubby area. | area {area-id | A.B.C.D} nssa [no-summary] [transstabilityint seconds] [transrole always] |
| Optionally, configure an Autonomous System Border Router (ASBR) to summarize Type 7 to Type 5 routes matching the specified address and mask. | area {area-id | A.B.C.D} nssa-range ipv6-address [not-advertise] |
| Optionally, configure an OSPF sham link between two PE routers. | area area-id sham-link source-ip-address destination-ip-address |
| Optionally, configure an OSPF sham link authentication key password. | area area-id sham-link source-ip-address destination-ip-address authentication-key password |
| Optionally, modify the OSPF sham link dead interval. | area area-id sham-link source-ip-address destination-ip-address dead-interval seconds |
| Optionally, modify the OSPF sham link hello interval. | area area-id sham-link source-ip-address destination-ip-address hello-interval seconds |
| Optionally, configure the OSPF sham link keychain. | area area-id sham-link source-ip-address destination-ip-address keychain name |
| Optionally, specify an OSPF sham link message digest key and MD5 authentication key. | area area-id sham-link source-ip-address destination-ip-address message-digest-key digest-key md5 auth-key |
| Optionally, modify the OSPF sham link retransmit interval. | area area-id sham-link source-ip-address destination-ip-address retransmit-interval seconds |
| Optionally, modify the OSPF sham link transmit delay period. | area area-id sham-link source-ip-address destination-ip-address transmit-delay seconds |
| Optionally, modify the OSPF sham link cost. | area area-id sham-link source-ip-address destination-ip-address cost cost |
| Optionally, configure an OSPF virtual-link, which represents a logical connection between the backbone and a non-backbone connected OSPF area. | area area-id virtual-link router-id area area-id virtual-link router-id dead-interval seconds area area-id virtual-link router-id hello-interval seconds area area-id virtual-link router-id retransmit-interval seconds area area-id virtual-link router-id transmit-delay seconds |
| Optionally, change the bandwidth reference setting used for calculating interface cost for this OSPF instance. | auto-cost reference-bandwidth bandwidth-multiplier |
| Optionally, enable passive OSPF on the specified interface. | passive-interface {vlan vlan-id | interface-name | default} |
| Optionally, allow routing information discovered through non-OSPF protocols to be distributed in OSPF update messages. Redistribution of BGP is supported on S- and 7100-Series platforms. | redistribute {bgp [global] | connected | rip | static | blackhole} [route-map name] [metric metric-value] [metric-type type-value] [tag tag] |
| Optionally, assign an OSPF route filter route-map to the OSPF distribute-list. | distribute-list route-map name in |
| Optionally, enable adjacency logging on this OSPFv3 router. | log-adjacency |
| Optionally, enable the graceful restart feature on this router. | graceful-restart enable |
| Optionally, change the graceful restart restart interval for this router. | graceful-restart restart-interval interval |
| Optionally, in system command mode, reset the specified OSPFv3 process ID or the OSPFv3 process. | clear ipv6 ospf process [process-id] |
| Optionally, in global configuration command mode, enable OSPFv3 protocol debugging output for the specified subsystem. | debug ipv6 ospf {subsystem} |
Configuring OSPF Optional Interface Parameters describes how to configure optional OSPF interface parameters. All commands in this procedure are entered in interface configuration command mode.
Configuring OSPF Optional Interface Parameters
| Task | Command(s) |
|---|---|
| Optionally, configure the OSPFv3 router neighbors for this router. | ipv6 ospf neighbor ipv6-address |
| Optionally, assign a cost for the specified neighbor on the interface. | ipv6 ospf neighbor ipv6-address cost number |
| Optionally, set the OSPFv3 priority value for the specified neighbor on the interface. | ipv6 ospf neighbor ipv6-address priority number |
| Optionally, set a non-broadcast neighbor polling interval. | ipv6 ospf neighbor ipv6-address poll-interval seconds |
| Optionally, filter outgoing link-state advertisements to an OSPFv3 neighbor on this interface. | ipv6 ospf neighbor ipv6-address database-filter-all-out |
| Optionally, set the OSPFv3 priority value for the interface. | ipv6 ospf priority number |
| Optionally, change the cost of sending an OSPF packet on this router interface. This setting overrides all other interface cost methods. | ipv6 ospf cost cost |
| Optionally, sum the interface speeds contained in the specified tracked object when calculating the OSPF interface cost. | ipv6 ospf cost track trackobject-name |
| Optionally, set the amount of time between retransmissions of link state advertisements (LSAs) for adjacencies that belong to the interface. | ipv6 ospf retransmit-interval seconds |
| Optionally, set the amount of delay before transmitting a link state update packet on an interface. | ipv6 ospf transmit-delay seconds |
| Optionally, enable the ignore MTU advertisement feature for the neighbor of this interface. | ipv6 ospf ignore-mtu |
| Optionally, change the number of seconds this router must wait before sending a hello packet to neighbor routers on this interface. | ipv6 ospf hello-interval seconds |
| Optionally, change the number of seconds this router must wait to receive a hello packet from its neighbor before determining that the neighbor is out of service. | ipv6 ospf dead-interval {seconds | minimal [hello-multiplier number]} |
| Optionally, configure IPsec authentication on an interface. | ipv6 ospf authentication spi spi {md5 key | sha1 key | aescbc key} [hex] |
| Optionally, configure IPsec encrypted authentication on an interface. | ipv6 ospf encryption ipsec spi spi {none | 3des key | aescbc {128 | 192 | 256} key} [hex] auth {md5 key | sha1 key | aescbc key | no-auth} |
| Optionally, disable the graceful restart helper feature on this interface. | ipv6 ospf helper-disable |
| Optionally, specify the network type that this interface is connected to. | ipv6 ospf network {non-broadcast | broadcast | point-to-point | point-to-multipoint} |
Displaying OSPFv3 Configuration and Statistics describes how to display OSPFv3 configuration and statistics.
Displaying OSPFv3 Configuration and Statistics
| Task | Command(s) |
|---|---|
| Displaying OSPFv3 configuration. | show ipv6 ospf |
| Displaying OSPFv3 link-state database information. | show ipv6 ospf database type [link-state-id] |
| Displaying information about OSPFv3 internal entries to area border routers and autonomous system boundary routers. | show ipv6 ospf border-routers |
| Displaying OSPFv3 interface configuration information. | show ipv6 ospf interface [vlan vlan-id] |
| Displaying OSPFv3 neighbor information. | show ipv6 ospf neighbor [router-id] [detail] [vlan vlan-id] |
| Displaying OSPFv3 sham link information. | show ipv6 ospf sham-link |
| Displaying OSPFv3 virtual-links configuration information. | show ipv6 ospf virtual-links |
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