Edge-Core ECS4110-28T Management Manual page 929

ipv6 dhcp snooping
option remote-id
E
XAMPLE
This example enables DHCPv6 snooping globally for the switch.
Console(config)#ipv6 dhcp snooping
Console(config)#
R C
ELATED OMMANDS
ipv6 dhcp snooping vlan (931)
ipv6 dhcp snooping trust (932)
This command enables the insertion of remote-id option 37 information
into DHCPv6 client messages. Remote-id option information such as the
port attached to the client, DUID, and VLAN ID is used by the DHCPv6
server to assign preassigned configuration data specific to the DHCPv6
client. Use the no form of the command to disable this function.
S
YNTAX
[no] ipv6 dhcp snooping option remote-id
D S
EFAULT ETTING
Disabled
C M
OMMAND ODE
Global Configuration
C U
OMMAND SAGE
DHCPv6 provides a relay mechanism for sending information about the
◆
switch and its DHCPv6 clients to the DHCPv6 server. Known as DHCPv6
Option 37, it allows compatible DHCPv6 servers to use the information
when assigning IP addresses, or to set other services or policies for
clients.
When DHCPv6 Snooping Information Option 37 is enabled, the
◆
requesting client (or an intermediate relay agent that has used the
information fields to describe itself) can be identified in the DHCPv6
request packets forwarded by the switch and in reply packets sent back
from the DHCPv6 server.
When the DHCPv6 Snooping Option 37 is enabled, clients can be
◆
identified by the switch port to which they are connected rather than
just their MAC address. DHCPv6 client-server exchange messages are
then forwarded directly between the server and client without having to
flood them to the entire VLAN.
◆ DHCPv6 snooping must be enabled for the DHCPv6 Option 37
information to be inserted into packets. When enabled, the switch will
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| General Security Measures
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HAPTER
DHCPv6 Snooping