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

This attribute, if changed, must be the same on all CLIMs in a Provider. If the CLIM is an Open
type, reboot it.
UDPSENDSPACE
This NonStop TCP/IPv6 Monitor attribute, which specifies the size of the window used for sending
data for the UDP protocol can be set by using the climconfig sysctl -update
net.core.wmem_max value and climconfig sysctl -update
net.core.wmem_default value commands.
This attribute, if changed, must be the same on all CLIMs in a Provider. If the CLIM is an Open
type, reboot it.
IPV6RAENABLE
If this attribute is set to ON, the NonStop TCP/IPv6 implementation performs the following tasks
when a router advertisement (RA) is received:
Learns the IPv6 address of a router and installs default
routes in the TCP/IPv6 routing tables.
Router discovery
Learns IPv6 on-link prefix (ranges of IPv6 addresses that
are directly reachable on a given link).
On-Link prefix discovery
Automatically creates and deletes interface addresses.Stateless address configuration
Automatically configures datalink attributes such as hop
limit, reachable time, retransmit time, and link MTU.
Interface attribute configuration
ND6HOSTD process is responsible for updating the global
address information in DNS automatically.
Sends RA message to ND6HOSTD process
If this attribute is set to OFF, it disables the routing table and interface configuration update during
RA message processing. TCPMON still sends RA messages to ND6HOSTD process. The default
is OFF.
In CIP, this attribute is controlled by climconfig sysctl, with the default as ON.
CLIMCMD {clim–name | ip–address} climconfig sysctl
-update net.ipv6.conf.all.autoconf 0
CLIMCMD {clim–name | ip–address} climconfig sysctl
-update net.ipv6.conf.<intf-name>.autoconf 0
ND6HOSTD is not supported in CIP.
Attribute Default Values and Ranges
Table 19: TCP/IP Attribute Default Values and Ranges shows TCP/IPv6 attributes and their default
values and allowable ranges. Table 20: TCP/IP Attributes, CIP Equivalents, and their CIP Default
Values and Ranges (page 200) shows these same attributes, their CIP equivalents, and their CIP
defaults values and allowable ranges.
Table 19 TCP/IP Attribute Default Values and Ranges
TCP/IPv6 Maximum Value
TCP/IPv6 Minimum
ValueTCP/IPv6 Default ValueTCP/IPv6 Attribute
3064INITIAL-TTL
(MAX-EPHEMERAL-PORT-16)10241024MIN-EPHEMERAL-PORT
655351665024MAX-EPHEMERAL-PORT
——ONRFC1323–ENABLE
2016TCPKEEPCNT
TCP/IP Attributes in CIP 199