Lucent Technologies 9077 16S, 9077 04S, 9076 manual Using the netstat command, Netstat -rn

Monitoring and Management Tools

Using the netstat command

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-sprints routing statistics

–netstat -i-nshows all configured interfaces

–netstat -a-nprints a list of all active connections

–netstat -g-nprints the multicast route table

–netstat -r-nprints 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 -lreturns the number of entries in the routing table, here is an example of a 50-entry table:

#netstat -rn wc -l 50

–netstat -sprints 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.

netstat -rn

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 -rnoptions 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 -rnoutput, 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 -rnoutput should correspond to at least one route that specifies the reachable network in the Destination column. The TCP/IP address of the SP

3-8 SP Switch Router Adapter Guide - 1.4 Update 2