Cisco Catalyst Blade Switch 3020 for HP Software Configuration Guide, Rel. 12.2(25)SEF1

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Cisco Catalyst Blade Switch 3020 for HP Software Configuration Guide
OL-8915-01
Chapter 17 Configuring DHCP Features
Configuring DHCP Features
• Remote-ID suboption fields
– The remote-ID type is 1.
– The length values are variable, depending on the length of the string that you configure.
Configuring DHCP Features
These sections contain this configuration information:
• Default DHCP Configuration, page 17-6
• DHCP Snooping Configuration Guidelines, page 17-7
• Configuring the DHCP Relay Agent, page 17-8
• Enabling DHCP Snooping and Option 82, page 17-8
Default DHCP Configuration
Table 17-1 shows the default DHCP configuration.
Length Length
Circuit
ID type
Suboption
type
Circuit ID Suboption Frame Format (for user-configured string):
Remote ID Suboption Frame Format (for user-configured string):
Suboption
type
Length Length
Remote
ID type
145774
N1N+2 1
N1N+2 2
ASCII Circuit ID string
1 byte 1 byte 1 byte N bytes (N = 3-63)
ASCII Remote ID string or hostname
N bytes (N = 1-63)
1 byte
1 byte 1 byte 1 byte1 byte
Table 17-1 Default DHCP Configuration
Feature Default Setting
DHCP server Enabled in Cisco IOS software, requires
configuration
1
DHCP relay agent Enabled
2
DHCP packet forwarding address None configured
Checking the relay agent information Enabled (invalid messages are dropped)
2