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Configure IPv6 Basic Functions

Configuration Condition

None

Enable IPv6 Unicast Forwarding Function

By default, the IPv6 unicast forwarding function is enabled. In some special cases, the user can disable the IPv6 unicast forwarding function. After disabling the function, do not forward the IPv6 packet.

Table 5-5 Enable IPv6 unicast forwarding function

Step

Command

Description

Enter the global configuration mode

configure terminal

-

Enable IPv6 unicast forwarding function

ipv6 unicast-routing

Mandatory

By default, the IPv6 unicast forwarding function is enabled.

Enable IPv6 Function of the Interface

Before performing the IPv6 configuration on one interface, first enable the IPv6 function. Otherwise, some configuration will not take effect.

Table 5-6 Enable the IPv6 function of the interface

Step Command Description

Enter the global configuration mode

configure terminal

-

Enter the interface configuration mode

interface interface-name

-

Enable the IPv6 function of the interface

ipv6 enable

Mandatory

By default, the IPv6 function of the interface is disabled.

Configure the Hop Limit of the IPv6 Packet

The IPv6 header contains the Hop Limit field, whose function is the same as the TTL field in the IPv4 header, representing the times the packet can be forwarded by the router over the network.

With the command, you can configure the hop limit in the IPv6 packet header generated by the device.

Table 5-7 Configure the hop limit of the IPv6 packet

Step

Command

Description

Enter the global configuration mode

configure terminal

-

Configure the hop limit of the IPv6 packet

ipv6 hop-limit value

Mandatory

By default, the hop limit of the IPv6 packet sent by the device is 64.

Configure the IPv6 MTU of the Interface

Table 5-8 Configure the IPv6 MTU of the interface

Step Command Description
Enter the global configuration mode configure terminal -

Enter the interface configuration mode

interface interface-name

-

Configure the IPv6 MTU of the interface

ipv6 mtu value

Mandatory

By default, do not configure the IPv6 MTU of the interface