Cisco SX350 Series Administration Manual page 398

IP Configuration
IPv6 Management and Interfaces
STEP 1
STEP 2
STEP 3
STEP 4
Cisco Sx350, SG350X, SG350XG, Sx550X & SG550XG Series Managed Switches, Firmware Release 2.2.5.x
DHCPv6 Relay is used for relaying DHCPv6 messages to DHCPv6 servers. It is defined in
RFC 3315.
When the DHCPv6 client is not directly connected to the DHCPv6 server, a DHCPv6 relay
agent (the device) to which this DHCPv6 client is directly-connected encapsulates the
received messages from the directly-connected DHCPv6 client, and forwards them to the
DHCPv6 server.
In the opposite direction, the relay agent decapsulates packets received from the DHCPv6
server and forwards them, towards the DHCPv6 client.
The user must configure the list DHCP servers to which packets are forwarded. Two sets of
DHCPv6 servers can be configured:
• Global Destinations—Packets are always relayed to these DHCPv6 servers.
• Interface List—This is a per-interface list of DHCPv6 servers. When a DHCPv6
packet is received on an interface, the packet is relayed both to the servers on the
interface list (if it exists) and to the servers on the global destination list.
Dependencies with Other Features
The DHCPv6 client and DHCPv6 relay functions are mutually exclusive on an interface.
Global Destinations
To configure a list of DHCPv6 servers to which all DHCPv6 packets are relayed:
Click IP Configuration > IPv6 Management and Interfaces > DHCPv6 Relay > Global
Destinations.
To add a default DHCPv6 server, click Add.
Enter the fields:
• IPv6 Address Type—Enter the type of the destination address to which client messages
are forwarded. The address type can be Link Local, Global or Multicast
(All_DHCP_Relay_Agents_and_Servers).
• DHCPv6 Server IP Address—Enter the address of the DHCPv6 server to which
packets are forwarded.
• IPv6 Interface—Enter the destination interface on which packets are transmitted when
the address type of the DHCPv6 server is Link Local or Multicast. The interface can
be a VLAN, LAG or tunnel.
Click Apply. The Running Configuration file is updated.
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