Cisco Cisco Firepower Management Center 4000

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FireSIGHT System User Guide
 
Chapter 9      Setting Up Virtual Routers
  Configuring Virtual Routers
All areas in an OSPF autonomous system must be physically connected to the backbone area. In some 
cases where this physical connection is not possible, you can use a vlink to connect to the backbone 
through a non-backbone area. Vlinks can also be used to connect two parts of a partitioned backbone 
through a non-backbone area.
You must add a minimum of two OSPF areas before you can add a vlink.
To add an OSPF area vlink:
Access: 
Admin/Network Admin
Step 1
Select 
Devices > Device Management
.
The Device Management page appears.
Step 2
Next to the device where you want to add the OSPF vlink, click the edit icon (
).
The Interfaces tab for that device appears.
Step 3
Click 
Virtual Routers
.
The Virtual Routers tab appears.
Step 4
Next to the virtual router where you want to add the OSPF interface, click the edit icon (
).
The Edit Virtual Router pop-up window appears.
Step 5
Click 
Dynamic Routing 
to display the dynamic routing options.
Step 6
Click 
OSPF
 to display the OSPF options.
Step 7
Under 
Areas
, click the add icon (
).
The Add OSPF Area pop-up window appears.
Step 8
Click 
Vlinks
.
The Vlinks tab appears.
Step 9
Click the add icon (
).
The Add OSPF Area Vlink pop-up window appears.
Step 10
In the 
Router ID 
field, type an IP address for the router.
Step 11
From the 
Authentication
 drop-down list, select the authentication profile the vlink will use.
Step 12
In the 
Hello Interval
 field, type the interval, in seconds, between sending of hello messages.
Step 13
In the 
Retrans Interval
 field, type the interval, in seconds, between retransmissions of unacknowledged 
updates.
Step 14
In the 
Wait Time
 field, type the number of seconds that the router waits between starting election and 
building adjacency.
Step 15
In the 
Dead Interval
 field, type the number of seconds that the router waits before declaring a neighbor 
down when not receiving messages from it. If this value is defined, it overrides the value calculated from 
dead count.
Step 16
In the 
Dead Count
 field, type a numerical value that when multiplied by the hello interval, specifies the 
number of seconds that the router waits before declaring a neighbor down when not receiving messages 
from it.
Step 17
Click 
OK
.
The OSPF area vlink is added.
Step 18
Click 
Save
.