Ethernet Adapter Installation and Support Guide

Replacing an E4SA
Ethernet Adapter Installation and Support Guide—425684-003
3-12
Redirect or Stop Any Customer Applications Using
the E4SA
11. If you determined that a SWAN concentrator is connected to the E4SA CRU to be
replaced, determine the names of the WAN subsystem IOPs configured to use that
SWAN concentrator.
a. Use the SCF INFO DEVICE command:
INFO DEVICE $ZZWAN.#*
b. Scan the output of the command for the SWAN concentrators you identified in
Step 10. Make a note of the WAN subsystem IOPs that use the SWAN
concentrators connected to the E4SA CRU.
Example 3-11 shows the output of this command. The SWAN concentrator
used by the WAN subsystem input/output process (IOP) is shown in the
Adapter Name field. The IOP named $A10 uses the SWAN concentrator
named S01.
Redirect or Stop Any Customer Applications Using the E4SA
To redirect or stop customer applications:
1. Notify end users that applications will be temporarily unavailable.
2. Perform any actions necessary to redirect or stop customer applications.
Stop the Communications Lines and SWAN Concentrator Lines
Using an E4SA
To stop a ServerNet wide area network (SWAN) concentrator and its associated WAN
subsystem IOPs and communications lines:
Example 3-11. SCF INFO DEVICE command
->INFO DEVICE $ZZWAN.#*
WAN MANAGER Detailed Info Device \TAHITI.$ZZWAN.#A10
*Adapter Name..... S01 *Clip........... 1
*Line............. 0 *Path........... A
Profile........... MLHSWAN *Recsize........ 12
Preferred Cpu..... 2 Alternate Cpu... 3
*Type............. (63,06)
*MULTINAME........ $PMAU1
*IOPOBJECT........ \TAHITI.$SYSTEM.SYS00.LHOBJ
Note. The actions required to perform this step depend on the customer’s application.
Note. A SWAN concentrator has dual Ethernet ports, which can be configured to connect to
ports on two different E4SAs; only one Ethernet connection is needed for full function. If the
SWAN concentrator’s second Ethernet port is connected to another E4SA (other than the
E4SA that you are replacing), you do not need to perform the following steps. However, the
SWAN concentrator will not be fault-tolerant while the E4SA is being replaced.