Selasa, 06 Mei 2008

Mikrotik Bandwidth Test

Overview

The Bandwidth Tester can be used to monitor the throughput only to a remote MikroTik router (either wired or wireless) and thereby help to discover network ‘bottlenecks’.

The TCP test uses the standard TCP protocol with acknowledgments and follows the TCP algorithm on how many packets to send according to latency, dropped packets, and other features in the TCP algorithm. Please review the TCP protocol for details on its internal speed settings and how to analyze its behavior. Statistics for throughput are calculated using the entire size of the TCP packet. As acknowledgments are an internal working of TCP, their size and usage of the link are not included in the throughput statistics. Therefore this statistic is not as reliable as the UDP statistic when estimating throughput.

The UDP tester sends 110% or more packets than currently reported as received on the other side of the link. To see the maximum throughput of a link, the packet size should be set for the maximum MTU allowed by the links – usually this is 1500 bytes. There is no acknowledgment required by UDP; this implementation means that the closest approximation of the throughput can be seen.

Installation

The Bandwidth Test feature is included in the 'system' package. No installation is needed for this feature

Hardware Resource Usage

!Caution! Bandwidth Test uses all available bandwidth (by default) and may impact network usability.

There is no other significant resource usage.

Bandwidth Test Description

Bandwidth Test Server Configuration

[admin@MikroTik] tool> bandwidth-server
Configure network bandwidth tester service. Use authentication for disabling
unwanted bandwidth wasting. Note that remote router must be MikroTik router in
order to run the test.

session
print
 get  get value of property
 set
export
[admin@MikroTik] tool> bandwidth-server print
  enabled: yes
    authenticate: no
allocate-udp-ports-from: 2000
    max-sessions: 10
[admin@MikroTik] tool>
Setting description:
enable - enable client connections for bandwidth test authenticate - communicate only with authenticated (by valid username and password) clients allocate-udp-ports-from - allocate UDP ports from max-sessions - maximal number of bandwidth-test clients
The list of current connections can be get in session submenu:
[admin@MikroTik] tool> bandwidth-server session

print  print values of item properties
remove  remove item
[admin@MikroTik] tool> bandwidth-server session print
# FROM     PROTOCOL DIRECTION USER
0 10.0.0.202     tcp      send
[admin@MikroTik] tool>

Bandwidth Test Client Configuration

Bandwidth Test uses TCP or UDP protocol for test. The test tries to use maximum or partial amount of bandwidth to test link speed. Be aware that default test uses all available bandwidth and may impact network usability.

[admin@MikroTik] tool> bandwidth-test
Run TCP or UDP bandwidth test. Tries to use maximum or partial amount of
bandwidth to test link speed. Note that remote router must be MikroTik router
in order to run the test. Be aware that default test uses all available
bandwidth and may impact network usability.

assume-lost-time direction Direction of data flow do duration interval local-tx-speed once print statistics once and quit password Password for remote user protocol Protocol to use for test remote-tx-speed size UDP packet size or TCP segment size user [admin@MikroTik] tool> bandwidth-test

Descriptions of arguments:

address - IP address of destination host assume-lost-time - If Bandwidth Server is not responding for that time, assume that connection is lost direction - specify the direction of the test (receive, transmit, both, default is transmit) do - Script source duration - Duration of the test interval - Delay between messages (in seconds). Default is 1 second. Can be 20ms...5s local-tx-speed - Transfer test maximum speed (given in bits per second) password - Password for remote user protocol - Type of protocol to use (UDP or TCP, default TCP) remote-tx-speed - Receive test maximum speed (given in bits per second) size - Packet size in bytes (50..1500, default 512). Works only with UDP protocol user - Remote user

Bandwidth Test Example

[admin@MikroTik] tool> bandwidth-test 10.0.0.202 user=admin direction=both protocol=udp \
\... size=1500 duration=14s
status: done testing
   tx-current: 11.49Mbps
tx-10-second-average: 10.05Mbps
tx-total-average: 7.96Mbps
   rx-current: 12.55Mbps
rx-10-second-average: 10.33Mbps
rx-total-average: 8.14Mbps

[admin@MikroTik] tool>

taken from: www.mikrotik.com

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