R3721-F3210-F3171-HP High-End Firewalls Network Management Configuration Guide-6PW101

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To configure an NSSA area:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enter OSPF view.
ospf [ process-id | router-id router-id
| vpn-instance vpn-instance-name ] *
N/A
3. Enter area view. area area-id N/A
4. Configure the area as an NSSA
area.
nssa [ default-route-advertise |
no-import-route | no-summary |
translate-always |
translator-stability-interval value ] *
Not configured by default.
5. Specify a cost for the default
route advertised to the NSSA
area.
default-cost cost
Optional.
Defaults to 1.
NOTE:
• You are required to use the nssa command on all the routers attached to an NSSA area.
• The default-cost command is available only on the ABR/ASBR of an NSSA area.
Configuring a virtual link
Non-backbone areas exchange routing information through the backbone area. Connectivity between
the backbone and non-backbone areas and within the backbone must be maintained.
If necessary physical links are not available for this connectivity maintenance, you can configure virtual
links to solve it.
To configure a virtual link:
Ste
p
Command Remarks
1. Enter system view. system-view N/A
2. Enter OSPF view.
ospf [ process-id | router-id router-id
| vpn-instance vpn-instance-name ] *
N/A
3. Enter area view.
area area-id N/A
4. Configure a virtual link
vlink-peer router-id [ hello seconds |
retransmit seconds | trans-delay
seconds | dead seconds | simple
[ plain | cipher ] password | { md5 |
hmac-md5 } key-id [ plain | cipher ]
password ] *
You need to configure this
command on both ends of a
virtual link.
hello and dead intervals must
be identical on both ends of
the virtual link.
Configuring OSPF network types
OSPF classifies networks into the following types by the link layer protocol:
• Broadcast—When the link layer protocol is Ethernet or FDDI, OSPF considers the network type as
broadcast by default.
• NBMA—When the link layer protocol is Frame Relay, ATM, or X.25, OSPF considers the network
type as NBMA by default.