Chapter 9
| General Security Measures
DHCPv6 Snooping
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Example
This example enables the DHCPv6 Snooping Remote-ID Option.
Console(config)#ipv6 dhcp snooping option remote-id
Console(config)#
ipv6 dhcp snooping
option remote-id
policy
This command sets the remote-id option policy for DHCPv6 client packets that
include Option 37 information. Use the no form to disable this function.
Syntax
ipv6 dhcp snooping option remote-id policy {drop | keep | replace}
no ipv6 dhcp snooping option remote-id policy
drop - Drops the client’s request packet instead of relaying it.
keep - Retains the Option 37 information in the client request, and
forwards the packets to trusted ports.
replace - Replaces the Option 37 remote-ID in the client’s request with the
relay agent’s remote-ID (when DHCPv6 snooping is enabled), and forwards
the packets to trusted ports.
Default Setting
drop
Command Mode
Global Configuration
Command Usage
When the switch receives DHCPv6 packets from clients that already include DHCP
Option 37 information, the switch can be configured to set the action policy for
these packets. The switch can either drop the DHCPv6 packets, keep the existing
information, or replace it with the switch’s relay agent information.
Example
This example configures the switch to keep existing remote-id option 37
information within DHCPv6 client packets and forward it.
Console(config)#ipv6 dhcp snooping option remote-id policy keep
Console(config)#
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