C.4 netstat Command
C.4 netstat Command
The netstat command displays the network status and the protocol statistics.
This command allows you to view a list of connections maintained by the host and their status. The command also allows you to check the IP, TCP, and UDP packet statistics and error conditions.
Table C-4 lists the options of the netstat command and how those options are useful for troubleshooting.
This command allows you to view a list of connections maintained by the host and their status. The command also allows you to check the IP, TCP, and UDP packet statistics and error conditions.
Table C-4 lists the options of the netstat command and how those options are useful for troubleshooting.
Option | Description | Application |
---|---|---|
-i |
Displays the interface status. The displayed content includes information on incoming and outgoing packets, incoming and outgoing errors, collisions, and queues. | Allows you to view a concise overview of the network status. |
-i interval |
Executes the netstat command at the interval of the number of seconds specified with a numeric value after the -i option. | Identifies intermittent or long-term network events. You can view nighttime events at a glance by piping the netstat output to a file. |
-p |
Displays the media table. | Allows you to check the MAC addresses of the host on the subnetwork. |
-r |
Displays the routing table. | Allows you to check the routing information. |
-n |
Converts a host name into an IP address and then displays it. | Allows you to check the IP address instead of the host name. |
The following example shows the output from the netstat command.
# netstat -p Net to Media Table: IPv4 Device IP Address Mask Flags Phys Addr ------ -------------------- --------------- -------- --------------- net0 4S-111-D0 255.255.255.255 SPLA b0:99:28:98:30:36 net0 10.24.187.1 255.255.255.255 00:0a:b8:50:cd:42 net0 224.0.0.22 255.255.255.255 S 01:00:5e:00:00:16 Net to Media Table: IPv6 If Physical Address Type State Destination/Mask ----- ----------------- ------- ------------ --------------------------- net0 33:33:00:00:00:01 other REACHABLE ff02::1 net0 33:33:00:00:00:02 other REACHABLE ff02::2 net0 33:33:00:01:00:02 other REACHABLE ff02::1:2 net0 33:33:00:00:00:16 other REACHABLE ff02::16 net0 b0:99:28:98:30:36 local REACHABLE fe80::b299:28ff:fe98:3036 net0 33:33:ff:98:30:36 other REACHABLE ff02::1:ff98:3036 # |
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