Cisco Catalyst 3120

Contents
xix
Cisco Catalyst Blade Switch 3120 for HP Software Configuration Guide
OL-12247-01
Option-82 Data Insertion 21-3
Cisco IOS DHCP Server Database 21-6
DHCP Snooping Binding Database 21-6
DHCP Snooping and Switch Stacks 21-8
Configuring DHCP Features 21-8
Default DHCP Configuration 21-8
DHCP Snooping Configuration Guidelines 21-9
Configuring the DHCP Server 21-10
DHCP Server and Switch Stacks 21-10
Configuring the DHCP Relay Agent 21-11
Specifying the Packet Forwarding Address 21-11
Enabling DHCP Snooping and Option 82 21-12
Enabling DHCP Snooping on Private VLANs 21-14
Enabling the Cisco IOS DHCP Server Database 21-14
Enabling the DHCP Snooping Binding Database Agent 21-14
Displaying DHCP Snooping Information 21-15
Understanding IP Source Guard 21-16
Source IP Address Filtering 21-16
Source IP and MAC Address Filtering 21-17
Configuring IP Source Guard 21-17
Default IP Source Guard Configuration 21-17
IP Source Guard Configuration Guidelines 21-17
Enabling IP Source Guard 21-18
Displaying IP Source Guard Information 21-19
CHAPTER 22 Configuring Dynamic ARP Inspection 22-1
Understanding Dynamic ARP Inspection 22-1
Interface Trust States and Network Security 22-3
Rate Limiting of ARP Packets 22-4
Relative Priority of ARP ACLs and DHCP Snooping Entries 22-4
Logging of Dropped Packets 22-5
Configuring Dynamic ARP Inspection 22-5
Default Dynamic ARP Inspection Configuration 22-5
Dynamic ARP Inspection Configuration Guidelines 22-6
Configuring Dynamic ARP Inspection in DHCP Environments 22-7
Configuring ARP ACLs for Non-DHCP Environments 22-8
Limiting the Rate of Incoming ARP Packets 22-11
Performing Validation Checks 22-12
Configuring the Log Buffer 22-13