Configuring Dhcp Snooping Entries Backup - HP A7500 Series Configuration Manual

To do...
Enter interface view
Enable DHCP snooping to support
Option 82
Configure the handling strategy for
requests containing Option 82
Configure Option
82 in the normal or
verbose padding
format
Configure
user-defined
Option 82

Configuring DHCP snooping entries backup

DHCP snooping entries cannot survive a reboot. If the DHCP snooping device is rebooted, security
modules (such as IP source guard) that use DHCP snooping entries to authenticate users will reject
requests from clients until new entries are learned.
The DHCP snooping entries backup feature enables you to store DHCP snooping entries in a file. When
the DHCP snooping device reboots, it reads DHCP snooping entries from this file.
Use the command...
interface interface-type interface-number
dhcp-snooping information enable
dhcp-snooping information strategy
{ drop | keep | replace }
dhcp-snooping information format
Configure the
{ normal | verbose [ node-identifier { mac
padding format for
| sysname | user-defined
Option 82
node-identifier } ] }
Configure the code
dhcp-snooping information circuit-id
type for the circuit
format-type { ascii | hex }
ID sub-option
Configure the code
dhcp-snooping information remote-id
type for the remote
format-type { ascii | hex }
ID sub-option
Configure the
padding content dhcp-snooping information [ vlan
for the circuit ID vlan-id ] circuit-id string circuit-id
sub-option
Configure the
dhcp-snooping information [ vlan
padding content
vlan-id ] remote-id string { remote-id |
for the remote ID
sysname }
sub-option
75
Remarks
—
Required
Disabled by default.
Optional
replace by default.
Optional
normal by default.
Optional
By default, the code
type depends on the
padding format of
Option 82. Each field
has its own code type.
This code type
configuration applies
to non-user-defined
Option 82 only.
Optional
hex by default.
The code type
configuration applies
to non-user-defined
Option 82 only.
Optional
By default, the
padding content
depends on the
padding format of
Option 82.
Optional
By default, the
padding content
depends on the
padding format of
Option 82.