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route(8): clarify -prefixlen description

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Try to reword -prefixlen section to more clearly and accurately describe how
the -prefixlen modifier works.

While here, fix a word that igor considered a typo: aggregatable addresses is a
valid technical term per RFC-2374, however, it was superseded by the term
"aggregator" in RFC-3587.

MFC after:	1 week
Reviewed by:	0mp, crees
Approved by:	emaste (mentor)
Differential Revision:	https://reviews.freebsd.org/D10087
This commit is contained in:
Enji Cooper 2019-01-10 00:10:12 +00:00
parent fc13fc1c3a
commit 8b5fede0ac
1 changed files with 7 additions and 7 deletions
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14
sbin/route/route.8
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@ -28,7 +28,7 @@
.\" @(#)route.8 8.3 (Berkeley) 3/19/94
.\" $FreeBSD$
.\"
.Dd February 16, 2018
.Dd January 9, 2019
.Dt ROUTE 8
.Os
.Sh NAME
@ -303,14 +303,14 @@ is available instead of the
qualifier because non-continuous masks are not allowed in IPv6.
For example,
.Fl prefixlen Li 32
specifies network mask of
specifies that a network mask of
.Li ffff:ffff:0000:0000:0000:0000:0000:0000
to be used.
The default value of prefixlen is 64 to get along with
the aggregatable address.
But 0 is assumed if
will be used.
The default prefixlen is 64.
However, it is assumed to be 0 if
.Cm default
is specified.
is specified for
.Ar destination .
Note that the qualifier works only for
.Dv AF_INET6
address family.