Deployment Guide

Configuring the Cost of OSPFv3 Routes
Change in bandwidth directly affects the cost of OSPF routes.
● Explicitly specify the cost of sending a packet on an interface.
INTERFACE mode
ipv6 ospf interface-cost
○ interface-cost:The range is from 1 to 65535. Default cost is based on the bandwidth.
● Specify how the OSPF interface cost is calculated based on the reference bandwidth method. The cost of an interface is
calculated as Reference Bandwidth/Interface speed.
ROUTER OSPFv3
auto-cost [reference-bandwidth ref-bw]
To return to the default bandwidth or to assign cost based on the interface type, use the no auto-cost [reference-
bandwidth ref-bw] command.
○ ref-bw: The range is from 1 to 4294967. The default is 100 megabits per second.
Configuring Stub Areas
To configure IPv6 stub areas, use the following command.
● Configure the area as a stub area.
CONF-IPV6-ROUTER-OSPF mode
area area-id stub [no-summary]
○ no-summary: use these keywords to prevent transmission in to the area of summary ASBR LSAs.
○ Area ID: a number or IP address assigned when creating the area. You can represent the area ID as a number from 0 to
65536 if you assign a dotted decimal format rather than an IP address.
Configuring Passive-Interface
To suppress the interface’s participation on an OSPFv3 interface, use the following command.
This command stops the router from sending updates on that interface.
● Specify whether some or all some of the interfaces are passive.
CONF-IPV6-ROUTER-OSPF mode
passive-interface {type slot/port}
Interface: identifies the specific interface that is passive.
○ For a port channel, enter the keywords port-channel then a number from 1 to 255 (for example, passive-
interface po 100)
○ For a 10-Gigabit Ethernet interface, enter the keyword TenGigabitEthernet then the slot/port information (for
example, passive-interface ten 2/3).
○ For a 40-Gigabit Ethernet interface, enter the keyword fortyGigE then the slot/port information (for example,
passive-interface ten 2/4).
○ For a VLAN, enter the keyword vlan then a number from 1 to 4094 (for example, passive-interface vlan
2222).
To enable both receiving and sending routing updates, use the no passive-interface interface command.
To indicate that hello packets are not transmitted on that interface, when you configure a passive interface, the show ipv6
ospf interface command adds the words passive interface.
Redistributing Routes
You can add routes from other routing instances or protocols to the OSPFv3 process.
With the redistribute command, you can include RIP, static, or directly connected routes in the OSPF process. Route
redistribution is also supported between OSPF Routing process IDs.
Open Shortest Path First (OSPFv2 and OSPFv3)
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