Hello there,
Regarding RTT v4 vs v6 I did something "interesting" recently,
would like to know your thoughs.
If you ping6 your loopback (let´s say 1000 packets) interface
with Windows or Linux, v6 is faster.
Now try the same on MAC (El capitan for example).., v6 is 20-25% slower.
I did the above with many devices (and asked some friends) and
the behavior was pretty much the same.
MAC:
--- 127.0.0.1 ping statistics ---
100 packets transmitted, 100 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 0.037/0.098/1.062/0.112 ms
--- ::1 ping6 statistics ---
100 packets transmitted, 100 packets received, 0.0% packet loss
round-trip min/avg/max/std-dev = 0.058/0.120/0.194/0.027 ms
Linux:
--- 127.0.0.1 ping statistics ---
100 packets transmitted, 100 received, 0% packet loss, time
98999ms
rtt min/avg/max/mdev = 0.015/0.021/0.049/0.007 ms
--- ::1 ping statistics ---
100 packets transmitted, 100 received, 0% packet loss, time
99013ms
rtt min/avg/max/mdev = 0.019/0.031/0.040/0.004 ms
Windows 10:
Ping statistics for ::1:
Packets: Sent = 100, Received = 100, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 0ms, Average = 0ms
Ping statistics for 127.0.0.1:
Packets: Sent = 100, Received = 100, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 4ms, Average = 0ms
Bye,
wetheitteam.com
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vivo v15 pro
Showing posts with label monitoring. Show all posts
Showing posts with label monitoring. Show all posts
Monday, August 21, 2017
Monday, February 29, 2016
Read a BGP live stream from CAIDA
Objective
Read a BGP live stream from CAIDA and insert them into a BGP session
What do we need
bgpreader from the bgpstream core package provided by Caida
bgp_simple.pl obtained in github
Overview
We will read the BGP live stream feed using bgpreader, then the standard output of it will be redirected to a pipe file (mkfifo) where a perl script called bgpsimple will be reading this file. This very same script will established the BGP session against a BGP speaker and announce the prefixes received in the stream.
LAB Topology
The configuration was already tested in Cisco & Quagga
The BGP Speaker (Cisco/Quagga) has the IPv4 address 192.168.1.1
The BGP Simple Linux box has the IP 192.168.1.2
How does it works?
bgpreader has the ability to write his output in the -m format used by libbgpdump (by RIPENCC), this is the very same format bgpsimple uses as stdin. That's why myroutes is a PIPE file (created with mkfifo).
Steps:
INSTALL BGP READER - UBUNTU 15.04
First install general some packages:
apt-get install apt-file libsqlite3-dev libsqlite3 libmysqlclient-dev libmysqlclient
apt-get install libcurl-dev libcurl autoconf git libssl-dev
apt-get install build-essential zlib1g-dev libbz2-dev
apt-get install libtool git
apt-get install zlib1g-dev
Also intall wandio
wandio-1.0.3
git clone https://github.com/alistairking/wandio
./configure
cd wandio
./bootstrap.sh
./configure && ./make && ./make install
wandiocat http://www.apple.com/library/test/success.html
to test wandio:
wandiocat http://www.apple.com/library/test/success.html
Download bgp reader tarball from:
https://bgpstream.caida.org/download
#ldconfig (before testing)
#mkfifo myroutes
to test bgpreader:
./bgpreader -p caida-bmp -w 1453912260 -m
(wait some seconds and then you will see something)
# git clone https://github.com/xdel/bgpsimple
Finally run everything
In two separate terminals (or any other way you would like to do it):
./bgpreader -p caida-bmp -w 1453912260 -m > /usr/src/bgpsimple/myroutes
./bgp_simple.pl -myas 65000 -myip 192.168.1.2 -peerip 192.168.1.1 -peeras 65000 -p myroutes
One more time, what will happen behind this?
bgpreader will read an online feed from a project called caida-bmp with starting timestamp 1453912260 (Jan 27 2016, 16:31) in "-m" format, It means a libbgpdump format (see references). The stardard output of all this will be send to the file /usr/src/bgpsimple/myroutes which is a "pipe file". At the same time, bgp_simple.pl will create an iBGP session againts peer 192.168.1.1/AS65000 (a bgp speaker such as Quagga or Cisco). bgp_simple.pl will read myroutes files and send what it seems in this file thru the iBGP Session.
Important information
- The BGP Session won't be established until there is something in the file myroutes
- eBGP multi-hop session are allowed
- You have to wait short time (few seconds) until bgpreaders start to actually see something and bgp_simple.pl starts to announce to the BGP peer
References / More information:
-Part of the work was based on:
http://evilrouters.net/2009/08/21/getting-bgp-routes-into-dynamips-with-video/
- Caida BGP Stream:
https://bgpstream.caida.org/
- bgpreader info:
https://bgpstream.caida.org/docs/tools/bgpreader
- RIPE NCC libbgpdump:
http://www.ris.ripe.net/source/bgpdump/
- Introduction of "Named Pipes" (pipe files in Linux):
http://www.linuxjournal.com/article/2156
Read a BGP live stream from CAIDA and insert them into a BGP session
What do we need
bgpreader from the bgpstream core package provided by Caida
bgp_simple.pl obtained in github
Overview
We will read the BGP live stream feed using bgpreader, then the standard output of it will be redirected to a pipe file (mkfifo) where a perl script called bgpsimple will be reading this file. This very same script will established the BGP session against a BGP speaker and announce the prefixes received in the stream.
LAB Topology
The configuration was already tested in Cisco & Quagga
The BGP Speaker (Cisco/Quagga) has the IPv4 address 192.168.1.1
The BGP Simple Linux box has the IP 192.168.1.2
How does it works?
bgpreader has the ability to write his output in the -m format used by libbgpdump (by RIPENCC), this is the very same format bgpsimple uses as stdin. That's why myroutes is a PIPE file (created with mkfifo).
Steps:
INSTALL BGP READER - UBUNTU 15.04
First install general some packages:
apt-get install apt-file libsqlite3-dev libsqlite3 libmysqlclient-dev libmysqlclient
apt-get install libcurl-dev libcurl autoconf git libssl-dev
apt-get install build-essential zlib1g-dev libbz2-dev
apt-get install libtool git
apt-get install zlib1g-dev
Also intall wandio
wandio-1.0.3
git clone https://github.com/alistairking/wandio
./configure
cd wandio
./bootstrap.sh
./configure && ./make && ./make install
wandiocat http://www.apple.com/library/test/success.html
to test wandio:
wandiocat http://www.apple.com/library/test/success.html
Download bgp reader tarball from:
https://bgpstream.caida.org/download
#ldconfig (before testing)
#mkfifo myroutes
to test bgpreader:
./bgpreader -p caida-bmp -w 1453912260 -m
(wait some seconds and then you will see something)
# git clone https://github.com/xdel/bgpsimple
Finally run everything
In two separate terminals (or any other way you would like to do it):
./bgpreader -p caida-bmp -w 1453912260 -m > /usr/src/bgpsimple/myroutes
./bgp_simple.pl -myas 65000 -myip 192.168.1.2 -peerip 192.168.1.1 -peeras 65000 -p myroutes
One more time, what will happen behind this?
bgpreader will read an online feed from a project called caida-bmp with starting timestamp 1453912260 (Jan 27 2016, 16:31) in "-m" format, It means a libbgpdump format (see references). The stardard output of all this will be send to the file /usr/src/bgpsimple/myroutes which is a "pipe file". At the same time, bgp_simple.pl will create an iBGP session againts peer 192.168.1.1/AS65000 (a bgp speaker such as Quagga or Cisco). bgp_simple.pl will read myroutes files and send what it seems in this file thru the iBGP Session.
Important information
- The BGP Session won't be established until there is something in the file myroutes
- eBGP multi-hop session are allowed
- You have to wait short time (few seconds) until bgpreaders start to actually see something and bgp_simple.pl starts to announce to the BGP peer
References / More information:
-Part of the work was based on:
http://evilrouters.net/2009/08/21/getting-bgp-routes-into-dynamips-with-video/
- Caida BGP Stream:
https://bgpstream.caida.org/
- bgpreader info:
https://bgpstream.caida.org/docs/tools/bgpreader
- RIPE NCC libbgpdump:
http://www.ris.ripe.net/source/bgpdump/
- Introduction of "Named Pipes" (pipe files in Linux):
http://www.linuxjournal.com/article/2156
Saturday, January 12, 2013
Error 1017 in Cacti. MySQL. Blank Graphics
Error:
4/7/2012 5:37:49 PM - CMDPHP: Poller [0] ERROR: SQL Cell Failed!, Error: '1017 ', SQL: "SELECT count (*) FROM polle
WHERE r_time poller_id = 0 AND end_time> '0000-00-00 00:00:00 '"
4/7/2012 5:38:34 PM - CMDPHP: Poller [0] ERROR: SQL Cell Failed!, Error: '1017 ', SQL: "SELECT count (*) FROM polle
r_time WHERE end_time = '0000-00-00 00:00:00 '"
Procedure:
If the file cacti.log you see the above error tt indicates a failure with poller_output mysql table.
In this respect, I have seem three different solutions, order from the less risky to the highest.
1) Repair mysql table with a php script that brings cacti
# php $PATH-TO-CACTI/cli/repair_database.php
2) Repair the table with mysql command:
# mysql> REPAIR TABLE poller_output;
If you do not know the user information for the mysql database, it can be found here:
$PATH-TO-CACTI/include/config.php
3) Remove the table and do it again (this solution despite being aggressive works perfectly and you do not lose the historic Cacti information). Just enters the mysql CLI and copy/paste the following:
-
- Table structure for table `poller_output`
-
DROP TABLE IF EXISTS `poller_output`;
CREATE TABLE `poller_output` (
MEDIUMINT local_data_id `` (8) unsigned NOT NULL default '0 ',
Rrd_name `` varchar (19) NOT NULL default'',
`Time` datetime NOT NULL default '0000-00-00 00:00:00 ',
`Output` text NOT NULL,
PRIMARY KEY (`local_data_id`, `rrd_name`, `time`)
) TYPE = MyISAM;
-
- Dumping data for table `poller_output`
-
Poller_output `LOCK TABLES` WRITE;
/ *! 40000 ALTER TABLE `poller_output` DISABLE KEYS * /;
/ *! 40000 ALTER TABLE `poller_output` ENABLE KEYS * /;
UNLOCK TABLES;
Ready!, Then you can wait for the poller runs 15 minutes and you will have something in your graphs. If you want to force the poller command is as follows:
# /usr/bin/php-q /var /www/miServer-cacti/poller.php -force
I hope it will be useful,
4/7/2012 5:37:49 PM - CMDPHP: Poller [0] ERROR: SQL Cell Failed!, Error: '1017 ', SQL: "SELECT count (*) FROM polle
WHERE r_time poller_id = 0 AND end_time> '0000-00-00 00:00:00 '"
4/7/2012 5:38:34 PM - CMDPHP: Poller [0] ERROR: SQL Cell Failed!, Error: '1017 ', SQL: "SELECT count (*) FROM polle
r_time WHERE end_time = '0000-00-00 00:00:00 '"
Procedure:
If the file cacti.log you see the above error tt indicates a failure with poller_output mysql table.
In this respect, I have seem three different solutions, order from the less risky to the highest.
1) Repair mysql table with a php script that brings cacti
# php $PATH-TO-CACTI/cli/repair_database.php
2) Repair the table with mysql command:
# mysql> REPAIR TABLE poller_output;
If you do not know the user information for the mysql database, it can be found here:
$PATH-TO-CACTI/include/config.php
3) Remove the table and do it again (this solution despite being aggressive works perfectly and you do not lose the historic Cacti information). Just enters the mysql CLI and copy/paste the following:
-
- Table structure for table `poller_output`
-
DROP TABLE IF EXISTS `poller_output`;
CREATE TABLE `poller_output` (
MEDIUMINT local_data_id `` (8) unsigned NOT NULL default '0 ',
Rrd_name `` varchar (19) NOT NULL default'',
`Time` datetime NOT NULL default '0000-00-00 00:00:00 ',
`Output` text NOT NULL,
PRIMARY KEY (`local_data_id`, `rrd_name`, `time`)
) TYPE = MyISAM;
-
- Dumping data for table `poller_output`
-
Poller_output `LOCK TABLES` WRITE;
/ *! 40000 ALTER TABLE `poller_output` DISABLE KEYS * /;
/ *! 40000 ALTER TABLE `poller_output` ENABLE KEYS * /;
UNLOCK TABLES;
Ready!, Then you can wait for the poller runs 15 minutes and you will have something in your graphs. If you want to force the poller command is as follows:
# /usr/bin/php-q /var /www/miServer-cacti/poller.php -force
I hope it will be useful,
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