HP-UX Reference (11i v2 04/09) - 1M System Administration Commands N-Z (vol 4)

r
route(1M) route(1M)
v6destination (inet6 only) The destination host system where the packets will be routed.
v6destination can be one of the following:
• A host name (the official name or an alias, see getaddrinfo (3N)).
• An IPv6 address in "colon" notation (see inet6 (3N)).
• The keyword
default, which signifies the wildcard gateway route.
prefix (inet6 only) The prefix is an integer between 0 and 128 inclusive. It specifies how
many of the leftmost contiguous bits of the v6destination address comprise the
prefix. Its format is similar to the CIDR notation in IPv4. A prefix of 0 would be a
default route. If the prefix is omitted when adding a network route, then the prefix
would be 64 by default. It is advisable to specify the prefix when an IPv6 network
route is added. The prefix option can be applied to network routes only.
netmask mask
(inet only) The mask that will be bit-wise ANDed with destination to yield a net
address where the packets will be routed. mask can be specified as a single hexade-
cimal number with a leading
0x, with a "dot-notation" Internet address, or with a
pseudo-network name listed in the network table (see networks (4)). The length of
the mask, which is the number of contiguous 1’s starting from the left-most bit posi-
tion of the 32-bit field, can be shorter than the default network mask for the desti-
nation address. (see routing (7)). If the
netmask option is not given, mask for the
route will be derived from the netmasks associated with the local interfaces. (see
ifconfig(1M)). mask will be defaulted to the longest netmask of those local inter-
faces that have the same network address. If there is not any local interface that
has the same network address, then mask will default to the default value of net-
work mask of destination .
gateway (inet only) The gateway through which the destination is reached. gateway can be
one of the following:
• A host name (the official name or an alias, see gethostent (3N)).
• An Internet address in "dot" notation (see inet (3N)).
v6gateway (inet6 only) The gateway through which the destination is reached. v6gateway can
be one of the following:
• A host name (the official name or an alias, see getaddrinfo (3N)).
• An IPv6 address in "colon" notation (see inet6 (3N)).
count An integer that indicates whether the gateway is a remote host or the local host. If
the route leads to a destination through a remote gateway, count should be a
number greater than 0. If the route leads to destination and the gateway is the
local host, count should be 0. The default for count is zero. The result is not
defined if count is negative.
Operation
All symbolic names specified for a destination or gateway are looked up first as a host name using
gethostbyname() for IPv4 and getaddrinfo()
for IPv6; if the host name is not found, the destina-
tion is searched for as a network name using
getnetbyname() for IPv4 only. destination and gateway
can be in "dot" notation (see inet(3N)). v6destination and v6gateway can be in "colon" notation (see
inet6 (3N)).
If the
-n option is not specified, any host and network addresses are displayed symbolically according to
the name returned by gethostbyaddr() and getnetbyaddr()
, respectively, except for the default
network address (printed as
default) and addresses that have unknown names. Addresses with
unknown names are printed in Internet "dot" notation (see inet (3N)).
If the
-n option is specified, any host and network addresses are printed in Internet "dot" notation except
for the default network address which is printed as default.
If the
-f option is specified, route deletes all route table entries that specify a remote host for a gate-
way. If it is used with one of the subcommands described above, the entries are deleted before the sub-
command is processed.
Path MTU Discovery is a technique for discovering the maximum size of an IP datagram that can be sent
on an internet path without causing datagram fragmentation in the intermediate routers. In essence, a
source host that utilizes this technique initially sends out datagrams up to the the size of the outgoing
HP-UX 11i Version 2: September 2004 − 2 − Hewlett-Packard Company Section 1M−−707