Does anyone know of a tool/script that can aggregate subnets feed to it via command line? Meaning if I give it multiple /30s (or any size subnet) it will scrunch them together. Example: #aggregate_subnets.script 192.168.0.0/30 192.168.0.4/30 10.0.0.16/29 10.0.0.24/29 #192.168.0.0/29 10.0.0.16/28 Thanks. Ric Moseley VP of Engineering rmoseley@softlayer.com 214-442-0555 direct 972-989-7813 cell 214-442-0600 office 866-398-7638 toll-free 214-442-0601 fax 6400 International Parkway, Suite 2000 Plano, TX 75093 http://www.softlayer.com The contents of this email message and any attachments are confidential and are intended solely for the addressee. The information may also be legally privileged. This transmission is sent in trust for the sole purpose of delivery to the intended recipient. If you have received this transmission in error; any use, reproduction or dissemination of this transmission is strictly prohibited. If you are not the intended recipient, please immediately notify the sender by reply email and delete this message and all associated attachments.
netmask: netmask 192.168.0.0/30 192.168.0.4/30 10.0.0.16/29 10.0.0.16/29 192.168.0.0/29 Certainly available in the ubuntu repositories. On Mon, 21 Sep 2009 11:00:16 -0500 "Ric Moseley" <rmoseley@softlayer.com> wrote:
Does anyone know of a tool/script that can aggregate subnets feed to it via command line? Meaning if I give it multiple /30s (or any size subnet) it will scrunch them together.
Example:
#aggregate_subnets.script 192.168.0.0/30 192.168.0.4/30 10.0.0.16/29 10.0.0.24/29
#192.168.0.0/29 10.0.0.16/28
Thanks.
Ric Moseley
VP of Engineering
rmoseley@softlayer.com
214-442-0555 direct
972-989-7813 cell
214-442-0600 office
866-398-7638 toll-free
214-442-0601 fax
6400 International Parkway, Suite 2000 Plano, TX 75093 http://www.softlayer.com
The contents of this email message and any attachments are confidential and are intended solely for the addressee. The information may also be legally privileged. This transmission is sent in trust for the sole purpose of delivery to the intended recipient. If you have received this transmission in error; any use, reproduction or dissemination of this transmission is strictly prohibited. If you are not the intended recipient, please immediately notify the sender by reply email and delete this message and all associated attachments.
-- John
On 2009-09-21, at 12:00, Ric Moseley wrote:
Does anyone know of a tool/script that can aggregate subnets feed to it via command line? Meaning if I give it multiple /30s (or any size subnet) it will scrunch them together.
I wrote this years ago and we used it in 6461 for various things. ftp://ftp.isc.org/isc/aggregate/aggregate-1.6.tar.gz
Example:
#aggregate_subnets.script 192.168.0.0/30 192.168.0.4/30 10.0.0.16/29 10.0.0.24/29
#192.168.0.0/29 10.0.0.16/28
[octopus:~]% cat >input-file 192.168.0.0/30 192.168.0.4/30 10.0.0.16/29 10.0.0.24/29 [octopus:~]% [octopus:~]% aggregate <input-file >output-file aggregate: maximum prefix length permitted will be 32 [octopus:~]% cat output-file 10.0.0.16/28 192.168.0.0/29 [octopus:~]% It's quite bad at dealing with really long lists, but it's ok for small applications. There's a manual page, and options, and stuff. You can make it show its working, if you're worried about whether it is sane. [octopus:~]% aggregate -v <input-file aggregate: maximum prefix length permitted will be 32 [ 0] + 10.0.0.16/28 [ 0] + 192.168.0.0/29 [ 1] - 192.168.0.0/30 [ 2] - 192.168.0.4/30 [octopus:~]% I forget exactly what the numbers in the brackets mean, but from memory 0 means it's a generated prefix and anything else refers to a line number in the input stream. No doubt the source would provide illumination. I don't remember why I thought it was a good idea to spit out the "maximum prefix length" warning to stderr every time. Joe
Ric Moseley wrote:
Does anyone know of a tool/script that can aggregate subnets feed to it via command line? Meaning if I give it multiple /30s (or any size subnet) it will scrunch them together.
Here is a Perl script to do just that. My normal one reads from STDIN. #!/usr/bin/perl use Net::CIDR::Lite; my $cidr = Net::CIDR::Lite->new (); foreach (@ARGV) { if (/^[0-9a-f\.:]+(\/\d+)?$/) { $cidr->add_any ($_); } } print (join ("\n", $cidr->list ()));
participants (4)
-
Jeff Walter -
Joe Abley -
John Peach -
Ric Moseley