Cluster I/O Protocols (CIP) Configuration and Management Manual (H06.16+, J06.05+)

HOSTNAME
This NonStop TCP/IPv6 Monitor attribute, which specifies the official name by which the NonStop
host is known to the Internet, is set by using the NonStop host system SCF commands ADD PROVIDER
or ALTER PROVIDER. (See Chapter 10 (page 216) for more information about the HOSTNAME
attribute.)
MIN-EPHEMERAL-PORT, MAX-EPHEMERAL-PORT
These NonStop TCP/IPv6 Monitor attributes specify the starting and ending port numbers to allocate
for TCP and UDP ephemeral ports. An equivalent effect can be created by using the CLIMCMD
{clim–name | ip–address} climconfig sysctl -update
net.ipv4.ip_local_port_range command.
This attribute, if changed, must be the same on all CLIMs in a Provider.
RFC1323-ENABLE
This NonStop TCP/IPv6 Monitor attribute, which causes TCP to support TCP Large Windows as
documented in RFC 1323, can be set by issuing the CLIMCMD {clim–name | ip–address}
climconfig sysctl -update net.ipv4.tcp_window_scaling command.
TCPKEEPCNT
This NonStop TCP/IPv6 Monitor attribute, which specifies the number of times a keep-alive packet
is sent without receiving an acknowledgment, can be set by issuing the CLIMCMD {clim–name
| ip–address} climconfig sysctl -update net.ipv4.tcp_keepalive_probes command.
NOTE: The default for the TCPKEEPCNT attribute differs from that of the tcp_keepalive_probes
attribute. To change the tcp_keepalive_probes default to match the TCPKEEPCNT default, issue the
CLIMCMD command:
climconfig sysctl -update net.ipv4.tcp_keepalive_probes 8
TCPKEEPIDLE
This NonStop TCP/IPv6 Monitor attribute, which specifies the amount of time, in seconds, before
TCP issues a keep-alive packet on sockets that have enabled this option, can be set by issuing the
CLIMCMD {clim–name | ip–address} climconfig sysctl -update
net.ipv4.tcp_keepalive_time command.
NOTE: The default for the TCPKEEPIDLE attribute differs from that of the tcp_keepalive_time
attribute. To change the tcp_keepalive_time default to match the TCPKEEPIDLE default, issue the
CLIMCMD command:
climconfig sysctl -update net.ipv4.tcp_keepalive_time 75
TCPKEEPINTVL
This NonStop TCP/IPv6 Monitor attribute, which specifies the time interval in seconds between
retransmissions of unacknowledged keepalive packets, can be set by issuing the CLIMCMD
{clim–name | ip–address} climconfig sysctl -update
net.ipv4.tcp_keepalive_intvl command.
NOTE: The default for the TCPKEEPINTVL attribute differs from that of the tcp_keepalive_intvl
attribute. To change the tcp_keepalive_intvl default to match the TCPKEEPINTVL default, issue the
CLIMCMD command:
climconfig sysctl -update net.ipv4.tcp_keepalive_intvl 75
196 IP CIP Migration, Compatibility and Operational Differences