CLI Reference Guide-R07

Chapter 26 | DHCP Commands (IPv4 and IPv6)
DHCP Relay (IPv4 and IPv6)
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The layer 3 interface of the configured or destination VLAN must have its layer 3
interface enabled. (Adding an IPv6 or IP address to the VLAN interface will enable
it.)
The relay agent is enabled if the command show ipv6 dhcp relay destination
interface displays at least one entry for a configured VLAN. The relay agent is
disabled if the command displays no entries.
Example
In this example VLAN 600 is configured to forward client DHCPv6 messages out on
all configured VLANs using the multicast address FF05::1:3.
Console(config)#interface vlan 600
Console(config-if)#ipv6 dhcp relay destination multicast all
Console(config-if)#
show ipv6 dhcp relay
destination interface
Use this command to show the DHCPv6 relay agent configuration.
Syntax
show ipv6 dhcp relay destination [vlan address]
vlan vlan-id (Range: 1-4094)
Default Setting
None
Command Mode
Privileged Exec.
Example
In this example the DHCPv6 relay agent destinations for all configured VLANs with
DHCPv6 relay service enabled is shown. Note that the DHCPv6 relay service is
disabled for VLANs 600, 610 and 620; no entries are displayed. DHCPv6 relay service
is enabled on VLANs 1, 200 and 300.
Console#show ipv6 dhcp relay destination interface
DHCP relay destination :
VLAN 1 :
Multicast : VLAN 100
VLAN 200 :
Unicast : 2001:db8:85a3::8a2e:370:7334
2001:db8:85a3::8a2e:370:7336
2001:db8:85a3::8a2e:470:7334
2001:db8:85a3::8a2e:470:7336
2001:db8:85a3::8a2e:570:7334
VLAN 300 :
Multicast : VLAN 600
VLAN 610
VLAN 620
VLAN 600 :
VLAN 610 :