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.\" Automatically generated by Pod::Man 2.28 (Pod::Simple 3.29)
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.\"
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.\" Standard preamble:
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.\" ========================================================================
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.de Sp \" Vertical space (when we can't use .PP)
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.if t .sp .5v
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.if n .sp
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..
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.de Vb \" Begin verbatim text
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.ft CW
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.nf
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.ne \\$1
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..
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.de Ve \" End verbatim text
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.ft R
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.fi
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..
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.\" Set up some character translations and predefined strings. \*(-- will
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.\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left
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.\" double quote, and \*(R" will give a right double quote. \*(C+ will
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.\" give a nicer C++. Capital omega is used to do unbreakable dashes and
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.\" therefore won't be available. \*(C` and \*(C' expand to `' in nroff,
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.\" nothing in troff, for use with C<>.
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.tr \(*W-
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.ie n \{\
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. ds -- \(*W-
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. ds PI pi
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. if (\n(.H=4u)&(1m=24u) .ds -- \(*W\h'-12u'\(*W\h'-12u'-\" diablo 10 pitch
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. if (\n(.H=4u)&(1m=20u) .ds -- \(*W\h'-12u'\(*W\h'-8u'-\" diablo 12 pitch
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. ds L" ""
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'br\}
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.el\{\
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. ds -- \|\(em\|
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. ds PI \(*p
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. ds L" ``
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. ds R" ''
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'br\}
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.\"
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.\" Escape single quotes in literal strings from groff's Unicode transform.
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.ie \n(.g .ds Aq \(aq
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.el .ds Aq '
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.\"
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.\" If the F register is turned on, we'll generate index entries on stderr for
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.\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index
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.\" entries marked with X<> in POD. Of course, you'll have to process the
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.\" output yourself in some meaningful fashion.
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.\"
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.\" Avoid warning from groff about undefined register 'F'.
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.de IX
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..
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.nr rF 0
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.if \n(.g .if rF .nr rF 1
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.if (\n(rF:(\n(.g==0)) \{
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. if \nF \{
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. de IX
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. tm Index:\\$1\t\\n%\t"\\$2"
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..
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. if !\nF==2 \{
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. nr % 0
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. nr F 2
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. \}
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. \}
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.\}
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.rr rF
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.\"
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.\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2).
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.\" Fear. Run. Save yourself. No user-serviceable parts.
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. \" fudge factors for nroff and troff
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.if n \{\
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. ds #H 0
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. ds #V .8m
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. ds #[ \f1
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. ds #] \fP
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.\}
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.if t \{\
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. ds #H ((1u-(\\\\n(.fu%2u))*.13m)
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. ds #F 0
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. ds #] \&
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.\}
|
|
Packit |
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. \" simple accents for nroff and troff
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|
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.if n \{\
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. ds ' \&
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. ds ^ \&
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. ds , \&
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. ds ~ ~
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. ds /
|
|
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.\}
|
|
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.if t \{\
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|
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. ds ' \\k:\h'-(\\n(.wu*8/10-\*(#H)'\'\h"|\\n:u"
|
|
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. ds ` \\k:\h'-(\\n(.wu*8/10-\*(#H)'\`\h'|\\n:u'
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. ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'^\h'|\\n:u'
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|
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|
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|
|
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.\}
|
|
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. \" troff and (daisy-wheel) nroff accents
|
|
Packit |
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.ds : \\k:\h'-(\\n(.wu*8/10-\*(#H+.1m+\*(#F)'\v'-\*(#V'\z.\h'.2m+\*(#F'.\h'|\\n:u'\v'\*(#V'
|
|
Packit |
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.ds 8 \h'\*(#H'\(*b\h'-\*(#H'
|
|
Packit |
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.ds o \\k:\h'-(\\n(.wu+\w'\(de'u-\*(#H)/2u'\v'-.3n'\*(#[\z\(de\v'.3n'\h'|\\n:u'\*(#]
|
|
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.ds d- \h'\*(#H'\(pd\h'-\w'~'u'\v'-.25m'\f2\(hy\fP\v'.25m'\h'-\*(#H'
|
|
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.ds D- D\\k:\h'-\w'D'u'\v'-.11m'\z\(hy\v'.11m'\h'|\\n:u'
|
|
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.ds th \*(#[\v'.3m'\s+1I\s-1\v'-.3m'\h'-(\w'I'u*2/3)'\s-1o\s+1\*(#]
|
|
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.ds Th \*(#[\s+2I\s-2\h'-\w'I'u*3/5'\v'-.3m'o\v'.3m'\*(#]
|
|
Packit |
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.ds ae a\h'-(\w'a'u*4/10)'e
|
|
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.ds Ae A\h'-(\w'A'u*4/10)'E
|
|
Packit |
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. \" corrections for vroff
|
|
Packit |
667938 |
.if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u'
|
|
Packit |
667938 |
.if v .ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'\v'-.4m'^\v'.4m'\h'|\\n:u'
|
|
Packit |
667938 |
. \" for low resolution devices (crt and lpr)
|
|
Packit |
667938 |
.if \n(.H>23 .if \n(.V>19 \
|
|
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667938 |
\{\
|
|
Packit |
667938 |
. ds : e
|
|
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. ds 8 ss
|
|
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. ds o a
|
|
Packit |
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. ds d- d\h'-1'\(ga
|
|
Packit |
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. ds D- D\h'-1'\(hy
|
|
Packit |
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. ds th \o'bp'
|
|
Packit |
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. ds Th \o'LP'
|
|
Packit |
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. ds ae ae
|
|
Packit |
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. ds Ae AE
|
|
Packit |
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.\}
|
|
Packit |
667938 |
.rm #[ #] #H #V #F C
|
|
Packit |
667938 |
.\" ========================================================================
|
|
Packit |
667938 |
.\"
|
|
Packit |
667938 |
.IX Title "MRTG-IPV6 1"
|
|
Packit |
667938 |
.TH MRTG-IPV6 1 "2018-07-13" "2.17.7" "mrtg"
|
|
Packit |
667938 |
.\" For nroff, turn off justification. Always turn off hyphenation; it makes
|
|
Packit |
667938 |
.\" way too many mistakes in technical documents.
|
|
Packit |
667938 |
.if n .ad l
|
|
Packit |
667938 |
.nh
|
|
Packit |
667938 |
.SH "NAME"
|
|
Packit |
667938 |
mrtg\-ipv6 \- IPv6 support in MRTG
|
|
Packit |
667938 |
.SH "OVERVIEW"
|
|
Packit |
667938 |
.IX Header "OVERVIEW"
|
|
Packit |
667938 |
\&\s-1MRTG\s0 and cfgmaker support \s-1SNMP\s0 over IPv6. IPv6 targets can be specified by
|
|
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667938 |
hostname or IPv6 address, and if the required libraries are present (see
|
|
Packit |
667938 |
below), queries will use IPv6.
|
|
Packit |
667938 |
.SH "USAGE"
|
|
Packit |
667938 |
.IX Header "USAGE"
|
|
Packit |
667938 |
.SS "Enabling IPv6"
|
|
Packit |
667938 |
.IX Subsection "Enabling IPv6"
|
|
Packit |
667938 |
IPv6 is currently disabled by default and must be explicitly enabled. In
|
|
Packit |
667938 |
\&\s-1MRTG\s0 this is done by turning on the \fBEnableIPv6\fR global option in the
|
|
Packit |
667938 |
configuration file. In cfgmaker, it is enabled with the \fB\-\-enable\-ipv6\fR
|
|
Packit |
667938 |
command-line option.
|
|
Packit |
667938 |
.PP
|
|
Packit |
667938 |
If IPv6 is disabled, \s-1MRTG\s0 and cfgmaker should behave in exactly the same way
|
|
Packit |
667938 |
as previous versions. So the addition of IPv6 support should have no effect
|
|
Packit |
667938 |
on existing \s-1MRTG\s0 setups unless IPv6 is enabled.
|
|
Packit |
667938 |
.PP
|
|
Packit |
667938 |
IPv6 support requires the Socket6 and \s-1INET6\s0 libraries (see below). If \s-1MRTG\s0
|
|
Packit |
667938 |
can't find them, IPv6 is disabled.
|
|
Packit |
667938 |
.SS "Specifying IPv6 targets"
|
|
Packit |
667938 |
.IX Subsection "Specifying IPv6 targets"
|
|
Packit |
667938 |
IPv6 targets may be specified by name or IPv6 address. Numeric IPv6 addresses
|
|
Packit |
667938 |
may be used with both cfgmaker and \s-1MRTG,\s0 but they must be enclosed in square
|
|
Packit |
667938 |
brackets.
|
|
Packit |
667938 |
.PP
|
|
Packit |
667938 |
For example, a target could be specified as:
|
|
Packit |
667938 |
.PP
|
|
Packit |
667938 |
.Vb 1
|
|
Packit |
667938 |
\& public@[2001:760:4::]:161
|
|
Packit |
667938 |
.Ve
|
|
Packit |
667938 |
.PP
|
|
Packit |
667938 |
Hostnames work as expected: first an IPv6 name lookup is tried, then an IPv4
|
|
Packit |
667938 |
lookup.
|
|
Packit |
667938 |
.SS "Targets that do not support \s-1SNMP\s0 over IPv6"
|
|
Packit |
667938 |
.IX Subsection "Targets that do not support SNMP over IPv6"
|
|
Packit |
667938 |
Many targets (this currently includes all Cisco routers) do not yet support
|
|
Packit |
667938 |
\&\s-1SNMP\s0 over IPv6 and must be monitored over IPv4. This can cause problems if
|
|
Packit |
667938 |
you specify a target through its \s-1DNS\s0 name and the name maps to both the IPv6
|
|
Packit |
667938 |
address and the IPv4 address of the target: \s-1MRTG\s0 will only try IPv6, and will
|
|
Packit |
667938 |
fail.
|
|
Packit |
667938 |
.PP
|
|
Packit |
667938 |
To query these targets, use the \fBIPv4Only\fR per-target option, which tells
|
|
Packit |
667938 |
\&\s-1MRTG\s0 not to use \s-1SNMP\s0 over IPv6 for the target.
|
|
Packit |
667938 |
.PP
|
|
Packit |
667938 |
\&\s-1MRTG\s0 does not fall back to IPv4 for performance and correctness reasons. If
|
|
Packit |
667938 |
there are many routers to query, a timeout for every router would make \s-1MRTG\s0
|
|
Packit |
667938 |
take too long to query them all. And if, for some reason, IPv6 connectivity to
|
|
Packit |
667938 |
the target is lost, \s-1MRTG\s0's error messages can help figure out what is wrong.
|
|
Packit |
667938 |
.PP
|
|
Packit |
667938 |
cfgmaker does fall back from IPv6 to IPv4. If IPv6 is enabled and cfgmaker is
|
|
Packit |
667938 |
given a hostname that resolves to both an IPv6 and an IPv4 address, it first
|
|
Packit |
667938 |
tries to query the target over IPv6. If it receives no answer, it tries again
|
|
Packit |
667938 |
using IPv4. If the target answers, cfgmaker sets the IPv4Only option in the
|
|
Packit |
667938 |
generated config file.
|
|
Packit |
667938 |
.SH "IPv6 LIBRARIES"
|
|
Packit |
667938 |
.IX Header "IPv6 LIBRARIES"
|
|
Packit |
667938 |
.SS "Libraries required"
|
|
Packit |
667938 |
.IX Subsection "Libraries required"
|
|
Packit |
667938 |
IPv6 support requires the \fBSocket6\fR and \fB\s-1INET6\s0\fR Perl modules. Both can be
|
|
Packit |
667938 |
downloaded from \s-1CPAN:\s0
|
|
Packit |
667938 |
.PP
|
|
Packit |
667938 |
http://search.cpan.org/author/UMEMOTO/Socket6/
|
|
Packit |
667938 |
.PP
|
|
Packit |
667938 |
http://search.cpan.org/author/MONDEJAR/INET6/
|
|
Packit |
667938 |
.PP
|
|
Packit |
667938 |
If you use Debian, you will need the packages \fBlibsocket6\-perl\fR and
|
|
Packit |
667938 |
\&\fBlibio\-socket\-inet6\-perl\fR, which are (or should soon be) in unstable.
|
|
Packit |
667938 |
.PP
|
|
Packit |
667938 |
So far, IPv6 support has been tested on Linux only, and only with Socket6
|
|
Packit |
667938 |
version 0.12. Also note that IPv6 won't work at all if you don't have
|
|
Packit |
667938 |
\&\s-1INET6\s0.pm version 2.00 or newer.
|
|
Packit |
667938 |
.SS "Installing the libraries"
|
|
Packit |
667938 |
.IX Subsection "Installing the libraries"
|
|
Packit |
667938 |
Building and installing Socket6 and \s-1INET6\s0 is very simple. For each module,
|
|
Packit |
667938 |
just unpack the archive and then do:
|
|
Packit |
667938 |
.PP
|
|
Packit |
667938 |
.Vb 2
|
|
Packit |
667938 |
\& perl Makefile.PL
|
|
Packit |
667938 |
\& make
|
|
Packit |
667938 |
.Ve
|
|
Packit |
667938 |
.PP
|
|
Packit |
667938 |
and then:
|
|
Packit |
667938 |
.PP
|
|
Packit |
667938 |
.Vb 2
|
|
Packit |
667938 |
\& su
|
|
Packit |
667938 |
\& make install
|
|
Packit |
667938 |
.Ve
|
|
Packit |
667938 |
.PP
|
|
Packit |
667938 |
If you have installed the libraries successfully, cfgmaker and mrtg should
|
|
Packit |
667938 |
automatically detect them and allow IPv6 support to be enabled.
|
|
Packit |
667938 |
.SH "AUTHOR"
|
|
Packit |
667938 |
.IX Header "AUTHOR"
|
|
Packit |
667938 |
Lorenzo Colitti <lorenzo location colitti.com>
|