Cisco ONS 15327, Пользовательская документация

Страница: 157 / 559

4-13
Cisco ONS 15327 User Documentation, R3.3
June 2002
Chapter 4 IP Networking
ONS 15327 IP Addressing Scenarios
•
Area ID for LAN Port —Enter the OSPF area ID (dotted decimal format) for the router port where
the ONS 15327 is connected. (This number is different from the DCC OSPF Area ID.)
Step 5 Under Authentication, complete the following:
•
Type —If the router where the ONS 15327 is connected requires authentication, choose Simple
Password . Otherwise, choose No Authentication .
•
Key— If Simple Password is selected as the Authentication type, enter the password (OSPF key).
Step 6
Under Priority and Intervals, complete the following:
The OSPF priority and intervals default to values most commonly used by OSPF routers. In the Priority
and Intervals area, verify that these values match those used by the OSPF router where the ONS 15327
is connected.
•
Router Priority —Used to select the designated router for a subnet.
• Hello Interval (sec) —Sets the number of seconds between OSPF “hello” packet advertisements sent
by OSPF routers. Ten seconds is the default.
•
Dead Interval —Sets the number of seconds that will pass while an OSPF router’s packets are not
visible before its neighbors declare the router down. Forty seconds is the default.
•
Transit Delay (sec) —Indicates the service speed. One second is the default.
•
Retransmit Interval (sec) —Sets the time that will elapse before a packet is resent. Five seconds is
the default.
• LAN Metric —Sets a “cost” for sending packets across the LAN. This value should always be lower
than the DCC metric. Ten is the default.
Step 7
Under OSPF Area Range Table, create an area range table if one is needed:
Note
Area range tables consolidate the information that is propagated outside an OSPF Area border.
One ONS 15327 in the ONS 15327 OSPF area is connected to the OSPF router. An area range
table on this node points the router to the other nodes that reside within the ONS 15327 OSPF
area.
a.
Under OSPF Area Range Table, click Create .
b.
In the Create Area Range dialog box, enter the following:
–
Range Address —Enter the area IP address for the ONS 15327s that reside within the OSPF area.
For example, if the ONS 15327 OSPF area includes nodes with IP addresses 10.10.20.100,
10.10.30.150, 10.10.40.200, and 10.10.50.250, the range address would be 10.10.0.0.
– Range Area ID —Enter the OSPF area ID for the ONS 15327s. This is either the ID in the DCC
OSPF Area ID field or the ID in the Area ID for LAN Port field.
–
Mask Length —Enter the subnet mask length. In the Range Address example, this is 16.
– Advertise —Check if you want to advertise the OSPF range table.
c.
Click OK .
Step 8
All OSPF areas must be connected to Area 0. If the ONS 15327 OSPF area is not physically connected
to Area 0, use the following steps to create a virtual link table that will provide the disconnected area
with a logical path to Area 0:
a.
Under OSPF Virtual Link Table, click Create .