Specifying IPv6 Addresses

IPv6 Addresses are 128 bits (16 bytes) when compared to the 32 bit IPv4 addresses. The ExtremeXOS software accepts two standard representations for IPv6 addresses, as described in RFC 3513, section 2.2, items 1, 2, and 3.

For example, the 128 bits of the address can be represented by eight, four-digit hexadecimal numbers separated by colons:

2000:af13:ee10:34c5:800:9192:ba89:2311 3f11:5655:2300:304:0000:0000:7899:acde

Leading zeros in a four-digit group can be omitted.

There is a special use of a double colon (::) in an address. The double colon stands for one or more groups of 16 bits of zeros and can only be used once in an address. For example, the following addresses:

fe80:0:0:0:af34:2345:4afe:0 fe80:0:0:111:0:0:0:fe11 3c12:0:0:0:0:89:ff:3415

can be represented as:

fe80::af34:2345:4afe:0 fe80:0:0:111::fe11 3c12::89:ff:3415

Additionally, you can specify an address in a mixed IPv4/IPv6 mode that uses six, four-digit hexadecimal numbers for the highest-order part of the address, and uses the IPv4 dotted decimal representation for the lowest-order remaining portion.

For example:

0:0:0:0:0:0:192.168.1.1 0:0:0:0:0:ffff:10.0.14.254

These can be represented as:

::192.168.1.1 ::ffff:10.0.14.254

Both global and link-local IP addresses can be configured on a VLAN (Virtual LAN) or tunnel interface, using the following commands:

configure [{vlan} vlan_name | {tunnel} tunnel_name] ipaddress [ {eui64} ipv6_address_mask | ipv6-link-local

configure tunnel tunnel_name ipaddress [ipv6-link-local | {eui64} ipv6_address_mask ]

where ipaddress refers to the address specified in the above format.

The IPv6 address configuration can be verified using the following commands:

show vlan {vlan_name}

show ipconfig ipv6 {vlan vlan_name | tunnel tunnelname}

Published March 2020prev | next

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