Edge-Core ECS4660-28F, Management Manual, Page: 1631 / 2020

C
HAPTER
48
| DHCP Commands
DHCP Relay
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R
ELATED
C
OMMANDS
ip dhcp relay server (1629)
DHCP Relay for IPv6
ipv6 dhcp relay
destination
This command specifies the destination address or VLAN to which client
messages are forwarded for DHCP service. Use the no form to remove an
entry.
S
YNTAX
[ no ] ipv6 dhcp relay destination { ipv6-address | multicast { all |
vlan vlan-id }}
ipv6-address - A full IPv6 address including the network prefix and
host address bits. This address may designate another relay server
or a DHCPv6 server.
multicast - All DHCP server multicast address (FF:05::1:3).
all - All configured VLANs.
vlan-id - ID of configured VLAN. (Range: 1-4094)
D
EFAULT
S
ETTING
None
C
OMMAND
M
ODE
Interface Configuration (VLAN)
U
SAGE
G
UIDELINES
◆
This command is used to configure DHCPv6 relay functions for host
devices attached to the switch. If DHCPv6 relay service is enabled, and
this switch sees a DHCPv6 request broadcast, it inserts its own IP
address into the request so the DHCPv6 server will know the subnet
where the client is located. Then, the switch forwards the packet to the
next relay agent or DHCPv6 server on another network. When the
server receives the DHCPv6 request, it allocates a free IP address for
the DHCPv6 client from its defined scope for the DHCPv6 client’s
subnet, and sends a DHCPv6 response back to the DHCPv6 relay agent
(i.e., this switch). This switch then broadcasts the DHCPv6 response
received from the server to the client.
◆
When the multicast option is used, the switch multicasts the modified
client request to all configured VLANs or to a specified VLAN, and
enables DHCPv6 relay service for those VLANs.
◆
Up to five relay destinations may be configured by repeating this
command.
◆
When issuing the no ipv6 dhcp relay destination command without
any arguments, the switch will delete all configured destination
addresses and disable DHCP for IPv6 relay for all VLANs.