Contents
xxiv
Catalyst 6500 Series Switch Software Configuration Guide—Release 8.7
OL-8978-04
Default UDLD Configuration 32-2
Configuring UDLD on the Switch 32-3
Enabling UDLD Globally 32-3
Enabling UDLD on Individual Ports 32-3
Disabling UDLD on Individual Ports 32-4
Disabling UDLD Globally 32-4
Specifying the UDLD Message Interval 32-4
Enabling UDLD Aggressive Mode 32-5
Displaying the UDLD Configuration 32-5
CHAPTER
33 Configuring DHCP Snooping and IP Source Guard 33-1
Understanding How DHCP Snooping Works 33-1
DHCP Snooping Configuration Guidelines 33-2
Configuring DHCP Snooping on a VLAN 33-2
Default Configuration for DHCP Snooping 33-4
Enabling DHCP Snooping 33-4
Enabling DHCP Snooping on a Private VLAN 33-5
Enabling the DHCP-Snooping Host-Tracking Information Option 33-5
Enabling the DHCP Snooping MAC-Address Matching Option 33-6
Configuration Examples for DHCP Snooping 33-7
Specifying the DHCP-Snooping Binding Limit on a Per-Port Basis 33-11
Specifying the DHCP-Snooping IP Address-to-MAC Address Binding on a Per-Port Basis 33-12
Displaying DHCP-Snooping Information 33-12
Displaying the Binding Table 33-12
Displaying the DHCP-Snooping Configuration and Statistics 33-13
Storing DHCP-Snooping Binding Entries to a Flash Device 33-15
Understanding How IP Source Guard Works 33-16
IP Source Guard Configuration Guidelines 33-16
Enabling IP Source Guard on a Port 33-17
Displaying the IP Source Guard Information 33-18
CHAPTER
34 Configuring NTP 34-1
Understanding How NTP Works 34-1
NTP Default Configuration 34-2
Configuring NTP on the Switch 34-2
Enabling NTP in Broadcast-Client Mode 34-3
Configuring NTP in Client Mode 34-4
Configuring Authentication in Client Mode 34-4