Lucent Technologies 9077 16S User Manual

3-8

SP Switch Router Adapter Guide - 1.4 Update 2

Monitoring and Management Tools
Using the netstat command

The UNIX netstat command reports status and information about SP Switch Router media 
card physical interfaces.  netstat is available from the CLI and the UNIX shell.

–

netstat -r -s prints routing statistics 

–

netstat -i -n shows all configured interfaces 

–

netstat -a -n prints a list of all active connections   

–

netstat -g -n prints the multicast route table

–

netstat -r -n prints the current table of installed routes

In the output from netstat -r -n, the  => symbol next to a route means it is a duplicate 
key, but with a different netmask.

–

netstat -rn | wc -l returns the number of entries in the routing table, here is an 
example of a 50-entry table: 

      # netstat  -rn | wc -l

           50

–

netstat -s prints comprehensive statistics for protocols, including: IP, ICMP, TCP, and 
UDP, and GRIT, GRIEF, and GRID for SP Switch Router entities. 

Refer to the man page for a complete list of netstat options. Examples of netstat usage follow. 

Use this netstat command to determine that the SP Switch Router Adapter card has the correct 
routing table entries. You must have properly configured routing table entries so that TCP/IP 
packets can be routed to and from the SP system to the SP Switch Router Adapter card. Use 
netstat with the -rn options to view the card’s current routing table entries:

# netstat -rn

Routing tables

Internet:

Destination       Gateway            Flags   Refs     Use  Interface

default           129.40.85.126      UGS       3    19356  tn0

127.0.0.1         127.0.0.1          UH        0       19  lo0

129.40.85.64/26   link#1             UC        0        0  tn0

129.40.85.121     0:c0:f2:0:26:8a    UHL       4      490  lo0

129.40.85.126     0:0:a2:1:ff:e8     UHL       1        2  tn0

129.40.85.128/26  129.40.85.130      U         0        0  gt020

129.40.158.128/26 129.40.158.139     U         0    88652  gt030

129.40.192.128/26 129.40.192.139     U         0       34  gt060

224/8             link#1             UC        0        0  tn0

In the netstat -rn output, you will see the routing entries for the various SP Switch Router 
Adapters installed in the SP Switch Router. In the example above there are three. These are 
identified by their 

Interface

 names having the form 

gt0y0

 where 

y

 is the number of the 

chassis slot in which a specific SP Switch Router Adapter is installed. For more information on 
the logical interface naming convention, refer to Chapter 2.

Each 

Interface

 in the netstat -rn output should correspond to at least one route that 

specifies the reachable network in the 

Destination

 column. The TCP/IP address of the SP