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Chapter 10 Handling MVS Connectivity Problems
148
You cannot change the MTU size on an IBM 6400 printer. The MTU
size is fixed at 1024 bytes.
If these items are all in order, consult your TCP/IP network administrator
about a possible network problem.
Ping is Successful
A successful “
ping
” usually indicates that the MVS system can
communicate with the printer; however, you might receive a successful
“
ping
” even though the IP address of the TCP/IP-attached printer is a
duplicate of another IP address.
If PSF is unable to establish a network connection with the TCP/IP-
attached printer or if PSF output for this printer prints elsewhere, follow
these steps to determine whether the IP address of the printer is unique:
1. Turn the printer off.
2. Wait at least 5 minutes for TCP/IP to clear the Address Resolution
Protocol (ARP) tables. (If your installation specified a longer interval
on the ARPAGE configuration statement in the TCP/IP profile, you
may need to wait longer. For information about the ARPAGE
statement, refer to the
IBM TCP/IP MVS Customization and
Administration Guide
.)
3. Enter the “
ping
” command again from the MVS system.
NOTE: If you receive a successful response to the “
ping
” command,
there is a duplicate IP address. Consult your TCP/IP network
administrator.