Cabletron Systems SSIM-R8-02 Specifikace stáhnout pdf (Strana 278)

Load Balancing

258 Enterasys Xpedition User Reference Manual

You can verify an application by entering the following Configure mode commands:

Setting Server Status

It may become necessary at times to prevent new sessions from being directed to one or

more load balancing servers. For example, if you need to perform maintenance tasks on a

server system, you might want new sessions to temporarily not be directed to that server.

Setting the status of a server to “down” prevents new sessions from being directed to that

server. The “down” status does not affect any current sessions on the server. When the

server is again ready to accept new sessions, you can set the server status to “up.”

To set the status of a load balancing server, enter the following command in Enable mode:

Load Balancing and FTP

File Transfer Protocol (FTP) packets require special handling with load balancing, because

the FTP PORT command packets contain IP address information within the data portion

of the packet. If the FTP control port used is not port 21, it is important for the XP to know

the port number that is used for FTP.

To define an FTP control port (other than port 21) to the load balancing function, enter the

following command in Configure mode:

Allowing Access to Load Balancing Servers

Load balancing causes both source and destination addresses to be translated on the XP. It

may be undesirable in some cases for a source address to be translated; for example, when

Specify application verification

for all servers in specified group.

load-balance set group-options <group name> acv-

command

<command string> acv-reply <reply

string>

read-till-index <reply string> [check-port

<port-number>][acv-quit <quit string>]

Specify application verification

for specified server.

load-balance set server-options <ipaddr> port <port

number>

acv-command <command string> acv-

<reply string> read-till-index <reply string>

[check-port <port-number>][acv-quit <quit

string>

]

Set status of load balancing

server.

load-balance set server-status server-ip <ipaddr/range>

server-port <port number> group-name <group name>

status up|down

Specify the FTP control port. load-balance set ftp-control-port <port number>

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