R2511-HP MSR Router Series Layer 3 - IP Routing Configuration Guide(V5)

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Ste
p
Command Remarks
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.
The default cost is 1.
The default-cost command takes
effect only on the ABR/ASBR of an
NSSA area and a totally NSSA
area.
NOTE:
V
irtual links cannot transit an NSSA area or totally 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 available.
You can configure virtual links to ensure the connectivity when physical links are not enough. Virtual links
cannot transit a stub area, totally stub area, NSSA area, or totally NSSA area. MD5/HMAC-MD5
authentication supports MD5 key rollover. For more information, see "Configuring OSPF authentication."
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 } ] *
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 based on the link layer protocol:
• Broadcast—When the link layer protocol is Ethernet or FDDI, OSPF considers the network type as
broadcast by default.