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AXprefixlength

AXprefixlength is a parameter used within the AX addressing framework to specify the number of high-order bits in an AX address that form the fixed prefix. It functions similarly to prefix length in CIDR notation, serving to define the scope of a block of addresses, names, or identifiers managed under AX-based systems such as routing, naming, or policy enforcement.

The AXprefixlength is typically written as a numeric value that accompanies an AXaddress, forming a prefix

Usage and implications: AXprefixlength is used in routing decisions, access control, and directory or policy lookups

Range and constraints: The AXprefixlength must be within the valid range of the AX address length (0

See also: CIDR, prefix length, routing, addressing, AX address.

specification.
The
total
length
of
an
AX
address
is
finite
(for
example,
128
bits
in
a
hypothetical
AX-128
space).
A
shorter
AXprefixlength
fixes
a
larger
portion
of
the
address
space,
yielding
broader
matches,
while
a
longer
AXprefixlength
yields
more
specific,
smaller
blocks.
For
instance,
an
AXaddress
with
AXprefixlength
set
to
64
fixes
the
first
64
bits,
leaving
the
remaining
bits
for
sub-addressing
or
host-level
differentiation.
to
determine
which
blocks
of
addresses
or
identifiers
apply
to
a
given
query
or
packet.
It
enables
aggregation
and
hierarchical
organization
of
the
address
space,
facilitating
scalable
management
and
efficient
lookups.
to
N,
where
N
is
the
total
bit
width
of
AX
addresses).
Practical
values
depend
on
the
desired
granularity
and
the
specific
AX
deployment.
Inconsistent
or
misaligned
prefix
lengths
across
devices
can
lead
to
mismatches
or
inefficient
routing.