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

Table 20 TCP/IP Attributes, CIP Equivalents, and their CIP Default Values and Ranges (continued)
CIP Maximum Value
CIP
Minimum
ValueCIP Default ValueCIP Equivalent AttributeTCP/IP Attribute
10485769216net.core.wmem_default/wmem_maxUDPSENDSPACE
10485761023(built-in)MAX-PRIV-PORT
101net.ipv6.conf.all.autoconfIPV6RAENABLE
100net.ipv4.tcp_tw_recycleTCPTIMEWAIT
(seconds)
NonStop TCP/IPv6 Attributes Not Supported
ARPTIMER-REFRESHED
This NonStop TCP/IPv6 Monitor attribute is not supported in CIP because CIP already restarts the
ARP timer on each reference and cannot be configured differently. This action is the same as the
NonStop TCP/IPv6 default.
TCPTIMEWAIT
This NonStop TCP/IPv6 Monitor attribute is not supported in CIP. The TIME_WAIT period cannot
be configured in CIP. The application can use SO_REUSEADDR option to re-use the port.
ICMP-FILTER-PKTS
This NonStop TCP/IPv6 Monitor attribute is used to control the flow of the ICMP packets into the
system. CIP does not support this capability.
DELAYACKS
This NonStop TCP/IPv6 Monitor attribute, which specifies whether acknowledgments for TCP
packets be sent immediately (as soon as a packet is received), is not supported in CIP. CIP uses a
sophisticated ACK delay algorithm that makes this option unnecessary.
DELAYACKSTIME
This NonStop TCP/IPv6 Monitor attribute, which specifies how much the delay time is before an
ACK (acknowledgment) is sent for a packet, is not supported in CIP.
ALLNETSARELOCAL
This NonStop TCP/IPv6 Monitor attribute is a method of optimizing maximum segment size (MSS).
CIP does not change the MSS advertisement based on whether the address is local. It uses the
higher of the first hop device MTU and the /proc variable ip_rt_min_advmss, but may be overridden
by information stored in the routing table from previous connections to the same remote address.
The ALLNETSARELOCAL attribute therefore does not apply to CIP, but the advertised MSS may not
match that of NonStop TCP/IPv6.
MAX-PRIV-PORT
This NonStop TCP/IPv6 Monitor attribute, which specified the largest TCP and UDP port number
that needed super-user access, is not supported by CIP. The value is fixed at 1023.
NONSHAREDOUTDIST
This NonStop TCP/IPv6 Monitor attribute, which specified whether or not the outbound data paths
for connections over nonshared IP failover pairs are distributed over both SUBNETs of the failover
pair, is not supported in CIP.
TCP/IP Attributes in CIP 201