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21
Configuring and Managing the Switch
CHAPTER 2
Monitoring traffic
Commands used
get-br-cnt
Displays the packet statistics for a port. For a
complete description, see page 52.
get-eth-cnt
Displays the Ethernet counters for a port.
get-colls-cnt
Displays the collision distribution counters for a
port.
get-rmon-cnt
Displays the Ethernet RMON counters for a port.
get-sdist-cnt
Displays the packet size distribution counters for a
port.
get-mgm-brcnt
Displays the statistics for the management port.
clr-cnt
Resets the Ethernet and bridging statistics.
Use monitoring commands to determine the traffic volume from
specific ports or between ports. This allows you to determine the
traffic patterns of your network and adjust your network topology for
maximum efficiency.
Statistics are generated for the current session. Reset counters by
using the clr-cnt command, resetting the switch, or cycling the
power.
In general, keep devices that primarily talk to each other on the same
segment (remember, each port is a Fast Ethernet segment). For
example, if a high volume of traffic is forwarded from port 4 to port
3, determine which devices are generating traffic and move them to
the same segment. This often happens when users are accessing a
server on a separate segment. A change may not be efficient,
however, if users from several segments all access the same server
frequently.
To check traffic on a port
1 Determine the port you want to check.
2 Type the command:
SYS_console> get-br-cnt 3
Ethernet Switching Counters for port 3
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