Interpreting netstat -s Post: 4476

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Top Forums UNIX for Dummies Questions & Answers Interpreting netstat -s Post 4476 by Neo on Wednesday 25th of July 2001 05:01:37 AM

07-25-2001

Administrator

Example output of netstat -s:

[quote]
athlon# netstat -s
Ip:
461270 total packets received
0 forwarded
0 incoming packets discarded
288 incoming packets delivered
374553 requests sent out
8 dropped because of missing route
Icmp:
29 ICMP messages received
0 input ICMP message failed.
ICMP input histogram:
destination unreachable: 29
899 ICMP messages sent
0 ICMP messages failed
ICMP output histogram:
destination unreachable: 899
Tcp:
34 active connections openings
0 passive connection openings
0 failed connection attempts
0 connection resets received
1 connections established
460013 segments received
373502 segments send out
993 segments retransmited
0 bad segments received.
2 resets sent
Udp:
123 packets received
32 packets to unknown port received.
0 packet receive errors
152 packets sent
TcpExt:
[/code]

There is nothing here that discusses file descriptors. This simply provides statistics about sockets, packets, tcp segments, and connections.

This command is not used to check for file descriptor usage.

Neo

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LEARN ABOUT PLAN9

snoopy

SNOOPY(8)						      System Manager's Manual							 SNOOPY(8)

NAME

       snoopy - spy on Ethernet packets

SYNOPSIS

       snoopy [ -abceiltup9 ] [ -np ] [ -N count ]

DESCRIPTION

       Snoopy  displays  the  header  and  first  20  data bytes of packets received from the local Ethernet.  The packets displayed depend on the
       options chosen.	The following options each select packets from a particular protocol.  If more than one flag is given,	packets  from  all
       those protocols are displayed.

       a      ARP

       b      BOOTP

       c      ICMP

       e      all Ethernet packets

       i      IP

       l      IL

       t      TCP

       u      UDP

       By default all addresses are translated into system names.  The option n suppresses this.

       Snoopy runs in promiscuous mode by default, displaying all packets it can capture from the Ethernet.  The option p causes only packets sent
       to or from the system snoopy is running on to be displayed.

       Option 9 causes the data of TCP and IL messages to be interpreted and displayed as 9P messages.	The N option sets the count  (default  20)
       of the number of bytes to dump in hexadecimal from each packet.

FILES

       /net/ether
	      Ethernet device

SOURCE

       /sys/src/cmd/ip/snoopy.c

BUGS

       The CPU servers do not take well to running in promiscuous mode.  If run on them, snoopy may kill their Ethernets.

																	 SNOOPY(8)