300-410 · Question #61
Which configuration adds an IPv4 interface to an OSPFv3 process in OSPFv3 address family configuration?
The correct answer is B. Router(config-router)#ospfv3 1 ipv4 area 0. To add an IPv4 interface to an OSPFv3 process and assign it to an area, the ospfv3 <process-id> ipv4 area <area-id> command is used, typically under the OSPFv3 router configuration mode or directly on the interface.
Question
Options
- ARouter# ospfV3 1 address-family ipv4
- BRouter(config-router)#ospfv3 1 ipv4 area 0
- CRouter(config-router)#ospfv3 3 1
- DRouter# ospfv3 1 address-family ipv4 unicast
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Why each option
To add an IPv4 interface to an OSPFv3 process and assign it to an area, the `ospfv3 <process-id> ipv4 area <area-id>` command is used, typically under the OSPFv3 router configuration mode or directly on the interface.
The command `Router# ospfV3 1 address-family ipv4` only enters the OSPFv3 process 1 and its IPv4 address family configuration mode, it does not enable OSPFv3 on an interface or assign it to an area.
The OSPFv3 protocol supports both IPv4 and IPv6 address families. To include an IPv4 interface in an OSPFv3 process and associate it with an area, the command `ospfv3 <process-id> ipv4 area <area-id>` is used, often applied directly on the interface or within the OSPFv3 router configuration in conjunction with address-family commands.
The command `ospfv3 3 1` is incomplete and syntactically incorrect for enabling OSPFv3 on an interface or assigning it to an area within an address family context.
The command `Router# ospfv3 1 address-family ipv4 unicast` enters the OSPFv3 process 1 and its IPv4 unicast address family configuration mode, but it does not specify an area or enable OSPFv3 on an interface.
Concept tested: OSPFv3 IPv4 Address Family Interface Configuration
Source: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_ospf/configuration/15-mt/iro-ospfv3-15-mt-book/iro-cfg-ospfv3.html
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