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Junos OS Interfaces Configuration Guide for Security Devices
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IPv6 Addressing
16
The IP address of the first subnet is therefore 192.14.17.128/27, or the following in binary
notation:
11000000 . 00001110 . 00010001 . 100xxxxx
The subnet mask includes 27 significant digits.
To create the second subnet of 46 devices, the network must accommodate 2 6 (64)
host numbers. The IP address of the second subnet is 192.14.17.64/26, or
11000000 . 00001110 . 00010001 . 01xxxxxx
By assigning address bits within the larger /24 subnet mask, you create two smaller
subnets that use the allocated address space more efficiently.
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Junos OS Feature Support Reference for SRX Series and J Series Devices
• Understanding Interface Logical Properties on page 12
• Understanding IPv6 Addressing on page 16
• Understanding IPv6 Addressing on page 16
• Configuring the inet6 IPv6 Protocol Family on page 18
• Enabling Flow-Based Processing for IPv6 Traffic on page 19
• Configuring Flow Aggregation to Use Version 9 Flow Templates on page 20
Understanding IPv6 Addressing
To create a much larger address space and relieve a projected future shortage of IP
addresses, IPv6 was created. IPv6 addresses consist of 128 bits, instead of 32 bits, and
include a scope field that identifies the type of application suitable for the address. IPv6
does not support broadcast addresses, but instead uses multicast addresses for
broadcast. In addition, IPv6 defines a new type of address called anycast.
This topic contains the following sections:
• IPv6 Address Representation on page 16
• IPv6 Address Types on page 17
• IPv6 Address Scope on page 17
• IPv6 Address Structure on page 17
IPv6 Address Representation
IPv6 addresses consist of 8 groups of 16-bit hexadecimal values separated by colons
(:). IPv6 addresses have the following format:
aaaa:aaaa:aaaa:aaaa:aaaa:aaaa:aaaa:aaaa
Each aaaa is a 16-bit hexadecimal value, and each a is a 4-bit hexadecimal value. Following
is a sample IPv6 address:
3FFE:0000:0000:0001:0200:F8FF:FE75:50DF
You can omit the leading zeros of each 16-bit group, as follows:
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