Ip Dhcp Snooping Vlan Information Option Format-Type Circuit-Id String - Cisco Catalyst 3560-X Command Reference Manual
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Also See for Catalyst 3560-X:
- Software configuration manual (1538 pages) ,
- Command reference manual (1244 pages) ,
- Manual (276 pages)
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Chapter 2
Catalyst 3750-X and 3560-X Switch Cisco IOS Commands
ip dhcp snooping vlan information option format-type circuit-id
string
Syntax Description
Defaults
Command Modes
Command History
Usage Guidelines
Note
OL-21522-02
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Use the ip dhcp snooping vlan information option format-type circuit-id string interface
configuration command on the switch stack or on a standalone switch to configure the option-82
circuit-ID suboption. Use the no form of this command to configure the default circuit-ID suboption.
ip dhcp snooping vlan vlan information option format-type circuit-id [override] string
ASCII-string
no ip dhcp snooping vlan vlan information option format-type circuit-id [override] string
vlan vlan
override
string ASCII-string
The switch VLAN and the port identifier, in the format vlan-mod-port, is the default circuit ID.
Interface configuration
Release
Modification
12.2(53)SE2
This command was introduced.
You must globally enable DHCP snooping by using the ip dhcp snooping global configuration
command for any DHCP snooping configuration to take effect.
When the option-82 feature is enabled, the default circuit-ID suboption is the switch VLAN and the port
identifier, in the format vlan-mod-port. This command allows you to configure a string of ASCII
characters to be the circuit ID. When you want to override the vlan-mod-port format type and instead
use the circuit-ID to define subscriber information, use the override keyword.
When configuring a large number of circuit IDs on a switch, consider the impact of lengthy character
strings on the NVRAM or flash memory. If the circuit-ID configurations, combined with other data,
exceed the capacity of the NVRAM or the flash memory, an error message appears.
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ip dhcp snooping vlan information option format-type circuit-id string
Specify the VLAN ID. The range is 1 to 4094.
(Optional) Specify an override string, using from 3 to 63 ASCII
characters (no spaces).
Specify a circuit ID, using from 3 to 63 ASCII characters (no
spaces).
Catalyst 3750-X and 3560-X Switch Command Reference
2-253
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