netstat.1 (2010 09)

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netstat(1) netstat(1)

The counts for the Ipkts and Opkts ﬁelds are for IP packets only.

This option is ignored if the

-p option is speciﬁed. By default, when the

-f

option is not speciﬁed, netstat

shows the state of interfaces conﬁgured with

either IPv4 or IPv6 addresses. An exception is when the user has not conﬁgured

any IPv6 address on any interface, netstat does not display the state of the

IPv6 loopback interface.

-I interface Show information about the speciﬁed interface only. This option applies to the

-g, -i, -z, and -Z

options.

-M Show the multicast routing tables. When

-s is used with the -M option,

netstat displays multicast routing statistics instead. This option is ignored if

the -p option is speciﬁed.

-n Show network addresses as numbers. Normally, netstat

interprets addresses

and attempts to display them symbolically. This option applies to the -a,

-i, -

r, -v, -z, and -Z

options.

-p protocol Show statistics for the speciﬁed protocol. The following protocols are recognized:

tcp, sctp, udp, ip,

icmp, igmp, ipv6, and icmpv6.

-r Show the routing tables. When -v is used with the

-r option, netstat also

displays the network masks in the route entries. This option is ignored if the

g, -i, -I, -p or interval option is speciﬁed and is invalid if the

-s option is

speciﬁed.

-s Show statistics for all protocols. When this option is used with the -M option,

netstat displays multicast routing statistics instead. This option is ignored if

the -g, -i, -I, -p or interval option is speciﬁed and is invalid if the

-r option

is speciﬁed.

-v Show additional routing information. When -v is used with the -r option,

netstat also displays the network masks in the route entries.

With SCTP, because there may be multiple addresses involved in a SCTP socket

endpoint, the

netstat -v command displays all local and remote addresses of

a SCTP socket.

Note: SCTP is available only if the optional SCTP bundle is installed.

-w Show the output in wide format. This option displays all the ﬁelds in the output

with their maximum resolution in a single line. Thus, the output can be worked

upon with text-processing tools. This option works only with the

-i option and

will be ignored when used with any other option.

-Z Display the current network interface statistics or protocol statistics, then set

them to zero. This option must be speciﬁed with either the

-I interface option,

or -i option, or the -p protocol option. This option supports the following proto-

cols only: tcp, udp, ip, icmp, igmp, ipv6, and icmpv6.

In addition, you must be superuser to use this option.

Note: If the statistics of an interface is zeroed using the

-Z option and the same

interface is reconﬁgured, then the statistics reported with -z option for that

interface will be inconsistent. So, after an interface is reconﬁgured, -z option

should be used only after zeroing the statistics again using -Z option.

-z Display statistics since they were last zeroed. By default, netstat displays

statistics since the system was last booted. Use this option with the -i, -I, and

-p, options only.

Note: For the -i option, the display of Ipkts and Opkts on a host system depends on the following

scenarios.

1. If the user conﬁgures virtual LANs on an interface (say lanX), with the IP addresses of the virtual

LANs (say lanX:1, lanX:2, and so on) belonging to the same subnet as that of the primary interface

(lanX:0), then the Opkts ﬁeld of the primary interface (lanX:0) will always be incremented unless the

destination address is one of the local addresses on the host.

2 Hewlett-Packard Company − 2 − HP-UX 11i Version 3: September 2010