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Running Redundant LLCs

This procedure describes the available parameters for running a redundant Low-Level Communicator (LLC) on Windows® or UNIX.

Before you begin

The CSP system software must be installed before you can start an LLC. SwitchKit must also be installed on your system. The LLC parameters must not be already specified through the shortcut settings in the Start menu, refer to Configuring SwitchKit to Run from the Start Menu.

Steps to start LLCs without CSA

Do the following to start redundant LLCs:

1 Open a Command Prompt window.

2 Specify the path to your installation directory. For the default locations:

• Windows C:\Program Files\Excel Switching Corporation\ SwitchKit

• UNIX /usr/local/switchkit/bin

3 On the primary Host (Host 1) set the following system variables:

SK_LLC_HOST=localhost
SK_LLC_PORT=1312
SK_RLLC_HOST=<IP Address> (IP Address of Host 2)
SK_RLLC_PORT=1312

4 On Secondary Host (Host 2) set the following system variables:

SK_LLC_HOST=<IP Address> (IP Address of Host 1)
SK_LLC_PORT=1312
SK_RLLC_HOST= localhost
SK_RLLC_PORT=1312

5 Start Primary LLC on Host 1:

• Windows Syntax llc

• UNIX Syntax ./llc

6 Start redundant LLC on Host 2

Windows Syntax llc -r <IP Address of Host 1>

UNIX Syntax ./llc -r <IP Address of Host 1>

7 Start SwitchManager on either Host 1 or Host 2.

8 See that the primary LLC shares data sending multiple messages to the "new LLC'.

"Done sharing data with new llc...."

9 Verify that the LLC on Host 2 is in a standby state. The example below shows the type of messages your would expect to see in your console window:

Jul 22 2004 11:38:22: using /usr/local/switchkit for SK_LIB_DIR

Jul 22 2004 11:38:22: **Running with ExcelLLC

Jul 22 2004 11:38:22: Waiting for connections on port 1312

Jul 22 2004 11:38:22: Connecting to 135.119.52.167 (135.119.52.167) on port 1312

Jul 22 2004 11:38:22: Connected to 135.119.52.167 as 2

Jul 22 2004 11:38:22: Found another llc running, receiving sync info...

Jul 22 2004 11:38:22: Received LogLevel Message and set log level to 1

Jul 22 2004 11:38:22: This LLC is Synchronized

Jul 22 2004 11:38:22: ** Standing by in redundant configuration

See Converged Services Administrator.
A computer, attached to the Excel platform through an RS-232 or Ethernet link, from which you run the telecommunications application that controls the Excel platform.
Internet Protocol. Part of the TCP/IP family of protocols used to route messages and tracks the addresses of nodes.
A 32-bit address, used in IP routing, which includes a Network address identifier assigned by a central authority and a Host ID (an end station identifier assigned by a LAN administrator).