Nortel Switched Firewall 2.3.3 User’s Guide and Command Reference
5
213455-L, October 2005
Chapter 3: Dynamic Host Configuration Protocol 91
DHCP relay agent 92
Configuring for DHCP relay agent 93
Chapter 4: Open Shortest Path First 95
OSPF overview 96
Types of OSPF areas 96
Types of OSPF routing devices 97
Neighbors and adjacencies 98
The Link-State database 99
The Shortest Path First tree 99
Authentication 100
Internal versus external routing 100
NSF 2.3.3 OSPF implementation 101
Configurable parameters 101
Defining areas 102
Assigning the area index 102
Using the area ID to assign the OSPF area number 103
Attaching an area to a network 103
Interface cost 104
Electing the designated router and backup 104
Router ID 104
Authentication 105
Simple authentication 105
MD5 authentication 105
GRE Tunnel support 106
OSPF features not supported in this release 106
OSPF configuration examples 107
Example 1: configuring a simple OSPF domain 107
Example 2: configuring GRE Tunnel 109
Avoiding loops in the GRE Tunnel 111
Example 3: configuring failover 113
Chapter 5: Redundant Firewalls 117
VRRP on the Switched Firewall 118
VRRP overview 118
Switched Firewall cluster 118
Active master determination 119
