4.9 DHCPv6

DHCP Snooping Configuration:

The following figure shows a DHCPv6 Snooping configuration.

The list of parameters is as follows:

• Snooping Mode: Indicates the DHCPv6 snooping mode. The following are the possible modes:
  • Enabled: Enables DHCPv6 snooping mode operation. When DHCPv6 snooping mode operation is enabled, the DHCPv6 client request messages are forwarded to trusted ports and only allow reply packets from trusted ports.
  • Disabled: Disables DHCP snooping mode operation
• Unknown IPv6 Next-Headers: Indicates how Unknown IPv6 Next-Header values must be treated. The switch must parse all IPv6 packets to a DHCPv6 client to determine if it is a DHCPv6 message. If an unknown IPv6 extension header is encountered, then the parsing cannot continue. See RFC 7610, section 5, item 3 for details. Following are the possible available options:
  • Drop: Drops packets with unknown IPv6 extension headers. This is the most secure option but may result in traffic disruptions.
  • Allow: Allows packets with unknown IPv6 extension headers. This is a less secure option but prevents traffic disruptions.
• Port Mode Configuration: Indicates the DHCPv6 snooping port mode. Possible port modes are:
  • Trusted: Configures the port as trusted source of the DHCPv6 messages
  • Untrusted: Configures the port as untrusted source of the DHCPv6 messages

DHCP Relay Configuration

This is a table to configure DHCPv6_Relay for a specific VLAN

The list of parameters is as follows:

• Interface: Interface identification.
• Relay Interface: Interface identification. The id of the interface used for relaying.
• Relay Destination: An Ipv6 address represented as human readable test as specified in RFC5952. The IPv6 address of the DHCPv6 server that requests shall be relayed to. The default value 'ff05::1:3’ means 'any DHCP server'.