IPv6 Global Configuration

The Internet Protocol version 6 (IPv6) is a network-layer protocol for packet-switched internet works. IPv6 was designed to replace IPv4, the predominantly deployed Internet protocol. IPv6 introduces greater flexibility in assigning IP addresses, because the address size increases from 32-bit to 128-bit addresses. IPv6 addresses are written as eight groups of four hexadecimal digits, for example FE80:0000:0000:0000:0000:9C00:876A:130B. The abbreviated form, in which a group of zeroes can be left out, and replaced with '::', is also acceptable, for example, FE80::9C00:876A:130B. IPv6 interface addresses can be configured manually by the user, or automatically configured by a DHCP server.

This section provides information for defining the device IPv6 addresses, either manually or by making the device a DHCP client. To define IPv6 global parameters and DHCPv6 client settings, follow these steps:

Procedure

Step 1

Click IPv6 Configuration > IPv6 Global Configuration.

Step 2

Enter values for the following fields:

  • IPv6 Routing—Select Enable to enable IPv6 routing. If this isn’t enabled, the device acts as a host (not a router) and can receive management packets, but can’t forward packets. If routing is enabled, the device can forward the IPv6 packets. Enabling IPv6 routing removes any address previously assigned to the device interface, via the auto-config operation, from an RA sent by a Router in the network.

  • ICMPv6 Rate Limit Interval—Enter how often the ICMP error messages are generated.

  • ICMPv6 Rate Limit Bucket Size—Enter the maximum number of ICMP error messages that can be sent by the device per interval.

  • IPv6 Hop Limit—Enter the maximum number of intermediate routers on its way to the final destination to which a packet can pass. Each time a packet is forwarded to another router, the hop limit is reduced. When the hop limit becomes zero, the packet is discarded. This prevents packets from being transferred endlessly.

  • DHCPv6 Client Settings

    • Unique Identifier (DUID) Format—This is the identifier of the DHCP client that is used by the DHCP server to locate the client. It can be in one of the following formats:

      • Link-Layer—(Default). If you select this option, the MAC address of the device is used.

      • Enterprise Number—If you select this option, enter the following fields.

    • Enterprise Number—The vendors registered Private Enterprise number as maintained by IANA.

    • Identifier—The vendor-defined hex string (up to 64 hex characters) If the number of the character isn’t even, a zero is added at the right. Each 2 hex characters can be separated by a period or colon.

  • DHCPv6 Unique Identifier (DUID)—Displays the identifier selected.

Step 3

Click Apply. The IPv6 global parameters and DHCPv6 client settings are updated.