Alteon Application Switch Operating System Application Guide
IPv6
Document ID: RDWR-ALOS-V2900_AG1302 837
IPv6 Address Types
There are three types of IPv6 addresses:
• Unicast, page 837
• Multicast, page 837
• Anycast, page 837
Unicast
There are two types of unicast addresses:
• Global unicast address—This is an address that can be reached and identified globally. Global
unicast addresses use the high-order bit range from 2000 to 3FFF. If the last 64 bits of the
address are not configured, Alteon defaults to the EUI-64 (Extended Unique Identifier 64-bit)
address format. RFC 3513 defines the expanding of the Ethernet MAC address based on a 48-bit
format into a 64-bit EUI-64 format.
The interface ID must be unique within the same subnet.
• Link-local unicast address—This is an address used to communicate with a neighbor on the
same link. Link-local addresses use the high-order bit range from FE80 to FEBF. Link-local
unicast addresses are configured on the interface by using the link-local prefix FE80::/10 and
the interface identifier in EUI-64 format for its low-order 64-bit. Link-local packets are not
routed between subnets.
Multicast
A multicast address (FF00 to FFFF) is an identifier for a group interface. The multicast address most
often encountered is a solicited-mode multicast address using prefix FF02::1:FF00:0000/104 with
the low-order 24 bits of the unicast or anycast address.
Anycast
Anycast addresses can be global unicast, site-local or link-local addresses used for a one-to-nearest
node member of the anycast group communication. Alteon does not support anycast addresses.
Pinging IPv6 Addresses
The following are examples of pinging IPv6 addresses:
To ping an IPv6 address
>> Main# /info/l3/nbrcache
>> IP6 Neighbor Discovery Protocol# ping6 3000::1
3000:0:0:0:0:0:0:1 is alive
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