Glen Krinsky
asked on
Band-width Limiting
I have a lab set up and I want to simulate a low-bandwidth environment. I would like to do this where the switch connects to the router. What is the proper way to do this? The switch is connected via FA 0/0 and is running at 100Mb/Sec. I would like to simulate a 256Kb/sec environment.
ASKER
Thanks, but I want this to be done from the router and no a software solution.
Did I miss the information about what kind of router you are using?
ASKER
Sorry, it's in the tags. I have 2811 routers, 3750G switches and 2960G switches.
In your lab you are going to test performance between "host a" and "host b"?
What are these host going to be plugged into?
What are these host going to be plugged into?
ASKER
My hosts plug into a 3750 which will plug into another 3750, then to a 2811 router. It is simulating a field setup. The field setup uses satillite to connect to the network. This sattilite connection is between the second 3750 and the 2811 router. To simulate this, I want to control the bandwidth from the 2811 router. I want to limit it to 256Kb/sec.
Looks like your answer is can be found in detail here http://hardforum.com/showthread.php?t=1694822
The short...QoS (EXAMPLE BELOW)
policy-map 75r_24c
class QOS_REAL-TIME
bandwidth percent 75
class QOS_CRITICAL-DATA
bandwidth percent 24
set ip dscp 34
class class-default
shape average 1000000000
interface FastEthernet0/0
description Connection to a Series of Tubes
ip address 123.123.123.123 255.255.255.0
service-policy output 75r_24
The short...QoS (EXAMPLE BELOW)
policy-map 75r_24c
class QOS_REAL-TIME
bandwidth percent 75
class QOS_CRITICAL-DATA
bandwidth percent 24
set ip dscp 34
class class-default
shape average 1000000000
interface FastEthernet0/0
description Connection to a Series of Tubes
ip address 123.123.123.123 255.255.255.0
service-policy output 75r_24
ASKER
Can I just use the bandwidth command on the interfaces?
Go to interface and type
bandwidth ?
You will see something like this..... <1-10000000> Bandwidth in kilobits
The above number is in kilobits and not kilobytes.
If you want to set the bandwidth to 256Kbps (kilobits / second)
use the command: bandwidth 256
Device(config-if)#bandwidt h 256
If you want to sent the bandwidth to 256KBps (kilobytes / second)
use the command: bandwidth 2048
Device(config-if)#bandwidt h 2048
8bits = 1byte. Hence, If you are interested in 256kBps, multiply 256 by 8 and that makes it 2048 bits.
bandwidth ?
You will see something like this..... <1-10000000> Bandwidth in kilobits
The above number is in kilobits and not kilobytes.
If you want to set the bandwidth to 256Kbps (kilobits / second)
use the command: bandwidth 256
Device(config-if)#bandwidt
If you want to sent the bandwidth to 256KBps (kilobytes / second)
use the command: bandwidth 2048
Device(config-if)#bandwidt
8bits = 1byte. Hence, If you are interested in 256kBps, multiply 256 by 8 and that makes it 2048 bits.
ASKER
Thanks mody2579, will this control bandwidth in and out or just in?
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ASKER
@mody2579...I found that yesterday as well and have implemented it. I am now waiting for traffic to run in order to test it. I can see some packets beingdropped, but not a significant amount. We are not running heavy traffic though.
http://wanem.sourceforge.net/