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xiv OmniSwitch 6600 Family Network Configuration Guide April 2006
DHCP Relay Overview .................................................................................................32-5
DHCP .....................................................................................................................32-5
DHCP and the OmniSwitch ...................................................................................32-6
DHCP Relay and Authentication ...........................................................................32-6
External DHCP Relay Application ........................................................................32-7
Internal DHCP Relay .............................................................................................32-8
DHCP Relay Implementation .......................................................................................32-9
Global DHCP .........................................................................................................32-9
Setting the IP Address .....................................................................................32-9
Per-VLAN DHCP ................................................................................................32-10
Identifying the VLAN ...................................................................................32-10
Configuring BOOTP/DHCP Relay Parameters ...................................................32-10
Setting the Forward Delay ....................................................................................32-11
Setting Maximum Hops .......................................................................................32-11
Setting the Relay Forwarding Option ...................................................................32-11
Using Automatic IP Configuration .............................................................................32-12
Enabling Automatic IP Configuration ..................................................................32-12
Configuring UDP Port Relay ......................................................................................32-13
Enabling/Disabling UDP Port Relay ....................................................................32-14
Specifying a Forwarding VLAN ..........................................................................32-14
Configuring DHCP Security Features .........................................................................32-15
Using the Relay Agent Information Option (Option-82) .....................................32-15
How the Relay Agent Processes DHCP Packets from the Client .................32-16
How the Relay Agent Processes DHCP Packets from the Server .................32-16
Enabling the Relay Agent Information Option-82 ........................................32-17
Configuring a Relay Agent Information Option-82 Policy ...........................32-17
Using DHCP Snooping ........................................................................................32-17
DHCP Snooping Configuration Guidelines ..................................................32-18
Enabling DHCP Snooping .............................................................................32-19
Configuring the Port Trust Mode ..................................................................32-20
Configuring the DHCP Snooping Binding Table ..........................................32-21
Configuring the Binding Table Timeout .......................................................32-21
Synchronizing the Binding Table ..................................................................32-22
Verifying the DHCP Relay Configuration ..................................................................32-23
Chapter 19 Configuring VRRP .....................................................................................................33-1
In This Chapter ..............................................................................................................33-1
VRRP Specifications .....................................................................................................33-2
VRRP Defaults ..............................................................................................................33-2
Quick Steps for Creating a Virtual Router ....................................................................33-3
VRRP Overview ............................................................................................................33-4
Why Use VRRP? ....................................................................................................33-5
Definition of a Virtual Router ................................................................................33-5
VRRP MAC Addresses ..........................................................................................33-6
ARP Requests ..................................................................................................33-6
ICMP Redirects ...............................................................................................33-6
VRRP Startup Delay ..............................................................................................33-6