Determine switch buffer size


 
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Old 02-04-2011
Determine switch buffer size

Hi everybody,

I need to calculate the tcp buffer size of a network switch, since it's not specified in the manual; how do I do this?

I have some machines connected to the switch and I can run some socket tests written in C between these machines (I can choose how many bytes to send and calculate the senders' and receiver's bandwidth) and I guess I need to keep sending more and more data until I see some slowdown in the sender's bandwidth (because that means that the senders are sending more data than the switch can handle), but I'm not sure about this.

Thanks for your help!
 
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fence_brocade(8)					      System Manager's Manual						  fence_brocade(8)

NAME
fence_brocade - I/O Fencing agent for Brocade FC switches SYNOPSIS
fence_brocade [OPTION]... DESCRIPTION
fence_brocade is an I/O Fencing agent which can be used with Brocade FC switches. It logs into a Brocade switch via telnet and disables a specified port. Disabling the port which a machine is connected to effectively fences that machine. Lengthy telnet connections to the switch should be avoided while a GFS cluster is running because the connection will block any necessary fencing actions. fence_brocade accepts options on the command line as well as from stdin. fenced sends parameters through stdin when it execs the agent. fence_brocade can be run by itself with command line options which is useful for testing. After a fence operation has taken place the fenced machine can no longer connect to the Brocade FC switch. When the fenced machine is ready to be brought back into the GFS cluster (after reboot) the port on the Brocade FC switch needs to be enabled. This can be done by running fence_brocade and specifying the enable action. Vendor URL: http://www.brocade.com OPTIONS
-a IPaddress IP address of the switch. -h Print out a help message describing available options, then exit. -l login Login name for the switch. -n port The port number to disable on the switch. -o action The action required. disable (default) or enable. -p password Password for login. -S path Full path to an executable to generate the password for login. -q Quiet mode: print only error messages. -V Print out a version message, then exit. STDIN PARAMETERS
agent = < param > This option is used by fence_node(8) and is ignored by fence_brocade. ipaddr = < hostname | ip > IP address or hostname of the switch. login = < param > Login name. option = < param > The action required. disable (default) or enable. passwd = < param > Password for login. passwd_script = < param > Full path to an executable to generate the password for login. port = < param > The port number to disable on the switch. SEE ALSO
fence(8), fence_node(8) fence_brocade(8)