TMS zl Management and Configuration Guide ST.1.1.100430

9-45
Routing
OSPF
Note When you change an interface’s hello interval, you must remember to change
its peer interface’s dead interval accordingly. Otherwise, the peer may wrongly
decide the interface is down. You can determine how many times longer the
dead interval should be than the hello interval according to how reliable your
network is. For example, the default dead interval is four times longer than
the hello interval, which allows for three hello packets to go astray without
changing the status of the link.
7. For Dead Interval, type the amount of time you want the module to wait
for a hello message from a peer router before declaring the route dead.
8. For Priority, type the priority of the TMS zl Module in DR election.
9. Configure Authentication settings. Do one of the following:
•For Ty pe , select None.
•For Ty pe , select Text.
i. For Password, type a password. This password must match the
password on other routers on the network associated with this
interface.
•For Ty pe , select MD5.
i. For Key ID, type the authentication key ID (1-255).
ii. For Key, type the 16-digit md5 key.
The key ID and key must match the those on other routers on the
network associated with this interface.
For more information on OSPF authentication, see “OSPF Authentica-
tion” on page 9-35.
10. Click OK.
Define NSSA and Stub Areas
When you enable OSPF on an interface, you set the area. Area 0 is automati-
cally defined as the backbone area. Other areas are automatically defined as
normal areas. If you want an area to be defined as a NSSA or stub area, you
must do so manually. (For information on the different types of areas, see
“Areas” on page 9-29.)