TCP/IPv6 Configuration and Management Manual (G06.29+, H06.03+, J06.03+)

SCF Reference for NonStop TCP/IPv6
HP NonStop TCP/IPv6 Configuration and Management Manual—524523-012
8-50
ALTER SUBNET Command for TCP6MAN
assumed object name. For information about the ASSUME command, see the
SCF Reference Manual for G-Series RVUs or the SCF Reference Manual for H-
Series RVUs.
FAMILY INET
specifies that the socket-family type of the SUBNET as AF_INET (IPv4). The
default value for the FAMILY attribute is INET.
IPADDRESS ip_address
is the 32-bit integer that identifies the SUBNET. This is the IPv4 address assigned
to the SUBNET by the network administrator.
SUBNETMASK subnet-mask
is a 32-bit integer in hexadecimal format that specifies the subnet mask for this
SUBNET. A subnet mask identifies which portion of the IP local address represents
the SUBNET number and which part represents the host ID. If bits in the subnet
mask are set to 1, the corresponding bits in the IP address are part of the network
(and SUBNET) address. If bits in the subnet mask are set to 0, the corresponding
bits in the IP address are part of the host ID. That is, that portion of the local
address masked with 1s identifies the SUBNET, and the remainder of the local
address uniquely identifies a host connected to the SUBNET.
IRDP { ON | OFF}
enables (ON) or disables (OFF) the ICMP Router Discovery Protocol on the
SUBNET interface. IRDP is a mechanism for locating default routers and is
specified in RFC 1256. IRDP must also be enabled on any local LAN routers. If
redundant routers are configured with route hold-down times and advertisement
intervals of approximately 30 seconds, IRDP can be used to provide a “black hole,”
or dead gateway, detection mechanism. The NonStop TCP/IPv6 subsystem
implements IRDP using IP broadcasts rather than IP multicasts.
ADDALIAS ip-addr
allows the addition of an alias IP address to the SUBNET specified in the ALTER
SUBNET command. The IP alias feature allows a process to be known to the
Internet by different IP addresses.For each alias address you want to add, you
must use a separate ALTER command.
When you specify an alias ip-addr, you must also specify a SUBNETMASK
value to be used with that alias address.
Note. You cannot use the same ALTER command to change a SUBNET’s IPADDRESS
and simultaneously specify an alias IP address for that
SUBNET.
Note. You cannot use the same ALTER command to specify an alias IP address for a
SUBNET and simultaneously change that SUBNET’s IPADDRESS specification. You must
use a separate ALTER commands for each of these operations.