Expand Configuration and Management Manual (G06.24+)

Configuring Expand-Over-IP Lines
Expand Configuration and Management Manual—523347-008
8-18
Step 2 (C): Identify an Available UDP Port Number
for TCP/IPv6 Use
You can use the SCF STATUS PROCESS command to determine which UDP port
numbers are already in use for a particular SUBNET. Example 8-8 shows an example
of a SCF STATUS PROCESS command for the TCPSAM process named $ZSAM1:
UDP port numbers are identified by UDP in the Proto field. UDP port numbers that are
in use are displayed in the Lport field. As shown in Example 8-8, the UDP port
numbers 1029, 68, 67, and 69 are in use. Based on the information shown by the SCF
STATUS PROCESS command, determine an available UDP port number. HP
recommends that you do not use a well-known UDP port number in the range 0 to
1023. You must specify this UDP port number when you define the Expand-over-IP
line-handler process in Step 4: Create the Line-Handler Process.
Step 2 (C): Identify an Available UDP Port
Number for TCP/IPv6 Use
A User Datagram Protocol (UDP) port number enables multiple applications to use
the same IP address. An Expand-over-IP line-handler process might share a local IP
address with other applications or with other Expand-over-IP processes. Each must
specify a different port number. To avoid conflict, you should identify an available UDP
port number for the IP address you selected in Step 1 (C): Select a Process and
SUBNET for NonStop TCP/IPv6 Use.
You can use the SCF MON PROCESS command to determine which UDP port
numbers are already in use for a particular SUBNET. To obtain a list of available UDP
port numbers, issue the following SCF command:
> STATUS MON $ZZTCP.*
Example 8-9 shows a sample result of the SCF STATUS MON command.
Example 8-8. SCF STATUS PROCESS Command for TCPSAM
3-> STATUS PROCESS $ZSAM1
TCPIP Status PROCESS \NODEC.$ZSAM1
Status: STARTED
PPID............ ( 0,311) BPID................... ( 1,292)
Proto State Laddr Lport Faddr Fport SendQ RecvQ
TCP ESTAB 172.16.35.15 1057 155.186.68.137 5000 0 0
UDP 0.0.0.0 1029 0.0.0.0 * 0 0
UDP 0.0.0.0 68 0.0.0.0 * 0 0
UDP 0.0.0.0 67 0.0.0.0 * 0 0
UDP 0.0.0.0 69 0.0.0.0 * 0 0
Note. You must also perform this step on the destination system before you can define the
local Expand-over-IP line-handler process. The destination UDP port number must be speci-
fied when the local Expand-over-IP line-handler process is defined.