Cabletron Systems SSIM-R8-02 Spécifications télécharger pdf (Page 276)

Load Balancing

256 Enterasys Xpedition User Reference Manual

To specify the connection threshold for servers in the group, enter the following command

in Configure mode:

Note: This limits the number of connections for each server in the group, not the total

number of connections for the group.

Verifying Servers and Applications

The XP automatically performs the following types of verification for the attached load

balancing servers/applications:

• Verifies the state of the server by sending a ping to the server at 5-second intervals. If

the XP does not receive a reply from a server after four ping requests, the server is

considered to be “down.”

• Checks that an application session on the server can be established by doing a simple

TCP handshake with the application on the configured physical port of the server at

15-second intervals. If the XP does not receive a reply from the application after four

tries, the application is considered to be “down.”

You can change the intervals at which pings or handshakes are attempted and the number

of times that the XP retries the ping or handshake before considering the server or

application to be “down.” You can change these parameters for all servers in a load

balancing group or for specific servers.

You can change the ping intervals and the number of retries by entering the following

Configure mode commands:.

Specify maximum number of

connections for all servers in the

group.

load-balance set group-conn-threshold <group name>

limit <maximum connections>

Set ping interval for all servers in

specified group.

load-balance set group-options <group name> ping-int

Set ping interval for specific

server.

load-balance set server-options <ipaddr> ping-int

Set number of ping retries for all

servers in specified group.

load-balance set group-options <group name> ping-tries

Set number of ping retries for

specific server.

load-balance set server-options <ipaddr> ping-tries

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Cabletron Systems SSIM-R8-02 Spécifications Page 276