
Customizing OSPF Services
117356-E Rev 00
6-17
Configuring External Route Preference
By default, when OSPF receives multiple AS external LSAs for the same
destination, OSPF applies the preference rules specified by RFC 1583 (superseded
by RFC 2178).
You can use Site Manager to configure OSPF to apply the preference rules
specified by RFC 2178. These rules are designed to prevent routing loops when
AS external LSAs for the same destination originate from different areas.
5. Set the following parameters:
• Primary Log Mask
•
Backup Log Mask
Click on
Help
or see the parameter
descriptions beginning on page A-38
.
6. Click on
OK
. You return to the Configuration Manager
window.
Site Manager Procedure
You do this System responds
1. In the Configuration Manager window,
choose
Protocols
.
The Protocols menu opens.
2. Choose
IP
. The IP menu opens.
3. Choose
OSPF/MOSPF
. The OSPF/MOSPF menu opens.
4. Choose
Global
. The Edit OSPF Global Parameters
window opens.
5. Set the
RFC 1583 Compatibility Enable
parameter. Click on
Help
or see the
parameter description on page A-40
.
6. Click on
OK
. You return to the Configuration Manager
window.
Site Manager Procedure
(continued)
You do this System responds
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