NDMPENABLEKEEPALIVE
The NDMPENABLEKEEPALIVE server option specifies whether the IBM® Storage Protect server enables Transmission Control Protocol (TCP) keepalive on network data-management protocol (NDMP) control connections to network-attached storage (NAS) devices. The default is NO.
TCP keepalive is implemented
within the network support of
an operating system. TCP keepalive prevents a long-running, inactive
connection from being closed by firewall software that detects and
closes inactive connections.
Restriction: To prevent errors,
do not enable TCP keepalive in certain types of environments. One
example is environments that do not have firewalls between the IBM
Storage Protect server and
a NAS device. Another example is environments with firewalls that
tolerate long-running, inactive connections. Enabling TCP keepalive
in this type of environment can cause an idle connection to be inadvertently
closed if the connection partner temporarily fails to respond to TCP
keepalive packets.
Syntax
Parameters
- NO
- Disable TCP keepalive on all NDMP control connections. NO is the default.
- YES
- Enable TCP keepalive on all NDMP control connections. The default idle time before the first TCP keepalive packet is sent is 120 minutes.
To
change the idle time,
use the NDMPKEEPIDLEMINUTES server option.
Example
Enable TCP keepalive on all NDMP control connections so that inactive NDMP connections are not closed:
ndmpenablekeepalive yes