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我现在有一组ip如下:
58.32.0.0/13
58.40.0.0/15
58.42.0.0/16
58.43.0.0/16
58.44.0.0/14
58.48.0.0/13
58.56.0.0/15
58.58.0.0/16
58.59.0.0/17
58.59.128.0/17
58.60.0.0/14
58.208.0.0/12
59.32.0.0/13
59.40.0.0/15
59.42.0.0/16
.
大家可以看到上面这几个IP
58.32.0.0/13
58.40.0.0/15
58.42.0.0/16
58.43.0.0/16
58.44.0.0/14
其实可以写成
58.32.0.0/12
我就是但是这一堆IP中可能有不连续的也就是中间差几个B类或者查几个C类没有。我想知道怎样用shell能够把连续的IP给合并。只要是上下连续就合并，以此类推。
其实我也有同样的问题，看到几位高手用shell和perl编的程序，甚为佩服，我测试了一下，但和需求略为有些差异，结果有出入。前几天我找到freebsd ports/net-mgmt/aggregate，就是干这个的，但我比较笨，研究了半个月也没有弄明白怎么用，下面是man aggregate的内容，请各位老大给于指点。多谢
man aggregate
AGGREGATE(1) AGGREGATE(1)
NAME
aggregate - optimise a list of route prefixes to help make nice short
filters
SYNOPSIS
aggregate [-m max-length] [-o max-opt-length] [-p default-length] [-q]
[-t] [-v]
DESCRIPTION
Takes a list of prefixes in conventional format on stdin, and performs
two optimisations to attempt to reduce the length of the prefix list.
The first optimisation is to remove any supplied prefixes which are
superfluous because they are already included in another supplied pre-
fix. For example, 203.97.2.0/24 would be removed if 203.97.0.0/17 was
also supplied.
The second optimisation identifies adjacent prefixes that can be com-
bined under a single, shorter-length prefix. For example, 203.97.2.0/24
and 203.97.3.0/24 can be combined into the single prefix 203.97.2.0/23.
OPTIONS
-m max-length
Sets the maximum prefix length for entries read from stdin
max_length bits. The default is 32. Prefixes with longer lengths
will be discarded prior to processing.
-o max-opt-length
Sets the maximum prefix length for optimisation to max-opt-
length bits. The default is 32. Prefixes with longer lengths
will not be subject to optimisation.
-p default-length
Sets the default prefix length. There is no default; without
this option a prefix without a mask length is treated as
invalid. Use -p 32 -m 32 -o 32 to aggregate a list of host
routes specified as bare addresses, for example.
-q Sets quiet mode -- instructs aggregate never to generate warning
messages or other output on stderr.
-t Silently truncate prefixes that seem to have an inconsistent
prefix: e.g. an input prefix 203.97.2.226/24 would be truncated
to 203.97.2.0/24. Without this option an input prefix
203.97.2.226/24 would not be accepted, and a warning about the
inconsistent mask would be generated.
-v Sets verbose mode. This changes the output format to display the
source line number that the prefix was obtained from, together
with a preceding "-" to indicate a route that can be suppressed,
or a "+" to indicate a shorter-prefix aggregate that was added
by aggregate as an adjacency optimisation. Note that verbose
output continues even if -q is selected.
DIAGNOSTICS
Aggregate exits 0 on success, and >0 if an error occurs.
EXAMPLES
The following list of prefixes:
193.58.204.0/22
193.58.208.0/22
193.193.160.0/22
193.193.168.0/22
193.243.164.0/22
194.126.128.0/22
194.126.132.0/22
194.126.134.0/23
194.151.128.0/19
195.42.240.0/21
195.240.0.0/16
195.241.0.0/16
is optimised as followed by aggregate (output shown using the -v flag):
aggregate: maximum prefix length permitted will be 24
[ 0] + 193.58.204.0/21
[ 1] - 193.58.204.0/22
[ 2] - 193.58.208.0/22
[ 3] 193.193.160.0/22
[ 4] 193.193.168.0/22
[ 5] 193.243.164.0/22
[ 0] + 194.126.128.0/21
[ 6] - 194.126.128.0/22
[ 7] - 194.126.132.0/22
[ 8] - 194.126.134.0/23
[ 9] 194.151.128.0/19
[ 10] 195.42.240.0/21
[ 0] + 195.240.0.0/15
[ 11] - 195.240.0.0/16
[ 12] - 195.241.0.0/16
Note that 193.58.204.0/22 and 193.58.208.0/22 were combined under the
single prefix 193.58.204.0/21, and 194.126.134.0/23 was suppressed
because it was included in 194.126.132.0/22. The number in square
brackets at the beginning of each line indicates the original line num-
ber, or zero for new prefixes that were introduced by aggregate.
The output without the -v flag is as follows:
193.58.204.0/21
193.193.160.0/22
193.193.168.0/22
193.243.164.0/22
194.126.128.0/21
194.151.128.0/19
195.42.240.0/21
195.240.0.0/15
SEE ALSO
aggregate-ios(1)
HISTORY
Aggregate was written by Joe Abley <jabley@mfnx.net>, and has been rea-
sonably well tested. It is suitable for reducing customer prefix fil-
ters for production use without extensive hand-proving of results.
Autoconf bits were donated by Michael Shields
<michael.shields@mfn.com>. The -t option was suggested by Robin John-
son <robbat2@fermi.orbis-terrarum.net>, and the treatment of leading
zeros on octet parsing was changed following comments from Arnold Nip-
per <arnold@nipper.de>.
An early version of aggregate would attempt to combine adjacent pre-
fixes regardless of whether the first prefix lay on an appropriate bit
boundary or not (pointed out with great restraint by Robert Noland
<rnoland@2hip.net>).
BUGS
Common unix parsing of IPv4 addresses understands the representation of
individual octets in octal or hexadecimal, following a "0" or "0x" pre-
fix, respectively. That convention has been deliberately disabled here,
since resources such as the IRR do not follow the convention, and con-
fusion can result.
For extremely sensitive applications, judicious use of the -v option
together with a pencil and paper is probably advisable.
Joe Abley 2001 November 2 AGGREGATE(1)
AGGREGATE(1) AGGREGATE(1)
NAME
aggregate - optimise a list of route prefixes to help make nice short
filters
SYNOPSIS
aggregate [-m max-length] [-o max-opt-length] [-p default-length] [-q]
[-t] [-v]
DESCRIPTION
Takes a list of prefixes in conventional format on stdin, and performs
two optimisations to attempt to reduce the length of the prefix list.
The first optimisation is to remove any supplied prefixes which are
superfluous because they are already included in another supplied pre-
fix. For example, 203.97.2.0/24 would be removed if 203.97.0.0/17 was
also supplied.
The second optimisation identifies adjacent prefixes that can be com-
bined under a single, shorter-length prefix. For example, 203.97.2.0/24
and 203.97.3.0/24 can be combined into the single prefix 203.97.2.0/23.
OPTIONS
-m max-length
Sets the maximum prefix length for entries read from stdin
max_length bits. The default is 32. Prefixes with longer lengths
will be discarded prior to processing.
-o max-opt-length
Sets the maximum prefix length for optimisation to max-opt-
length bits. The default is 32. Prefixes with longer lengths
will not be subject to optimisation.
-p default-length
Sets the default prefix length. There is no default; without
this option a prefix without a mask length is treated as
invalid. Use -p 32 -m 32 -o 32 to aggregate a list of host
routes specified as bare addresses, for example.
-q Sets quiet mode -- instructs aggregate never to generate warning
messages or other output on stderr.
-t Silently truncate prefixes that seem to have an inconsistent
prefix: e.g. an input prefix 203.97.2.226/24 would be truncated
to 203.97.2.0/24. Without this option an input prefix
203.97.2.226/24 would not be accepted, and a warning about the
inconsistent mask would be generated.
-v Sets verbose mode. This changes the output format to display the
source line number that the prefix was obtained from, together
with a preceding "-" to indicate a route that can be suppressed,
or a "+" to indicate a shorter-prefix aggregate that was added
by aggregate as an adjacency optimisation. Note that verbose
output continues even if -q is selected.
DIAGNOSTICS
Aggregate exits 0 on success, and >0 if an error occurs.
EXAMPLES
The following list of prefixes:
193.58.204.0/22
193.58.208.0/22
193.193.160.0/22
193.193.168.0/22
193.243.164.0/22
194.126.128.0/22
194.126.132.0/22
194.126.134.0/23
194.151.128.0/19
195.42.240.0/21
195.240.0.0/16
195.241.0.0/16
is optimised as followed by aggregate (output shown using the -v flag):
aggregate: maximum prefix length permitted will be 24
[ 0] + 193.58.204.0/21
[ 1] - 193.58.204.0/22
[ 2] - 193.58.208.0/22
[ 3] 193.193.160.0/22
[ 4] 193.193.168.0/22
[ 5] 193.243.164.0/22
[ 0] + 194.126.128.0/21
[ 6] - 194.126.128.0/22
[ 7] - 194.126.132.0/22
[ 8] - 194.126.134.0/23
[ 9] 194.151.128.0/19
[ 10] 195.42.240.0/21
[ 0] + 195.240.0.0/15
[ 11] - 195.240.0.0/16
[ 12] - 195.241.0.0/16
Note that 193.58.204.0/22 and 193.58.208.0/22 were combined under the
single prefix 193.58.204.0/21, and 194.126.134.0/23 was suppressed
because it was included in 194.126.132.0/22. The number in square
brackets at the beginning of each line indicates the original line num-
ber, or zero for new prefixes that were introduced by aggregate.
The output without the -v flag is as follows:
193.58.204.0/21
193.193.160.0/22
193.193.168.0/22
193.243.164.0/22
194.126.128.0/21
194.151.128.0/19
195.42.240.0/21
195.240.0.0/15
SEE ALSO
aggregate-ios(1)
HISTORY
Aggregate was written by Joe Abley <jabley@mfnx.net>, and has been rea-
sonably well tested. It is suitable for reducing customer prefix fil-
ters for production use without extensive hand-proving of results.
Autoconf bits were donated by Michael Shields
<michael.shields@mfn.com>. The -t option was suggested by Robin John-
son <robbat2@fermi.orbis-terrarum.net>, and the treatment of leading
zeros on octet parsing was changed following comments from Arnold Nip-
per <arnold@nipper.de>.
An early version of aggregate would attempt to combine adjacent pre-
fixes regardless of whether the first prefix lay on an appropriate bit
boundary or not (pointed out with great restraint by Robert Noland
<rnoland@2hip.net>).
BUGS
Common unix parsing of IPv4 addresses understands the representation of
individual octets in octal or hexadecimal, following a "0" or "0x" pre-
fix, respectively. That convention has been deliberately disabled here,
since resources such as the IRR do not follow the convention, and con-
fusion can result.
For extremely sensitive applications, judicious use of the -v option
together with a pencil and paper is probably advisable.
Joe Abley 2001 November 2 AGGREGATE(1)
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发表于 2006-04-15 18:36
