Configuring an nssa area, Configuring an ospfv3 virtual link – H3C Technologies H3C S5560 Series Switches User Manual

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Configuring an NSSA area

To configure an NSSA area, configure the nssa command on all the routers attached to the area.
To configure a totally NSSA area, configure the nssa no-summary command on the ABR. The ABR of a

totally NSSA area does not advertise inter-area routes into the area.
To configure an NSSA area:

Step Command

Remarks

1.

Enter system view.

system-view

N/A

2.

Enter OSPFv3 view.

ospfv3 [ process-id | vpn-instance
vpn-instance-name ] *

N/A

3.

Enter OSPFv3 area view.

area area-id

N/A

4.

Configure the area as an
NSSA area.

nssa [ default-route-advertise
[ cost cost | nssa-only |

route-policy route-policy-name |
tag tag | type type ] * |

no-import-route | no-summary |

[ translate-always |
translate-never ] | suppress-fa |

translator-stability-interval value ]

*

By default, no area is configured as
an NSSA area.

5.

(Optional.) Specify a cost for
the default route advertised

to the NSSA area.

default-cost cost

The default setting is 1.
This command takes effect only on

the ABR/ASBR of an NSSA or totally
NSSA area.

Configuring an OSPFv3 virtual link

You can configure a virtual link to maintain connectivity between a non-backbone area and the
backbone, or in the backbone itself.

IMPORTANT:

Both ends of a virtual link are ABRs that must be configured with the vlink-peer command.

Do not configure virtual links in the areas of a GR-capable process.

To configure a virtual link:

Step Command

Remarks

1.

Enter system view.

system-view

N/A

2.

Enter OSPFv3 view.

ospfv3 [ process-id | vpn-instance
vpn-instance-name ] *

N/A

3.

Enter OSPFv3 area view.

area area-id

N/A

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