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Managing the Hub
Console Command Reference
CDpstatus
To enable or disable the Cisco Discovery Protocol (CDP). The command takes
either an ON or an OFF argument. The initial setting is ON. ON enables the
protocol. OFF disables it. If no option is chosen, the current status is shown.
COunters
To display network activity counters for each network port, the hub's
SNMP agent, and the global count for all ports.
The port counters are from the IEEE 802.3 Repeater Management
Specification. They are described below:
Counter Name
Definition
Good Packets
Number of error-free packets received. Less than 4000
Collisions
Number of times the port was involved
in a collision. A single collision will be
counted by all ports involved, so the
total collision counters may be less than
the sum of the port counts.
Late Collisions
Number of collisions which went
undetected by the sending end node.
CRC/Alignment
Number of packets transmitted
Errors
incorrectly and number of incorrectly
aligned packets.
Giant Packets
Number of packets larger than 1518
bytes.
Broadcast Packets
Number of packets addressed to
everyone in the network. These packets
consume CPU resources from each
node on the network.
*The port counters in the ASCII console show totals, not number of packets per second. For the Good Packets and
Broadcast packets, display counters twice over a period of one section to see if the value falls in the valid range.
3-6
Corrective Action if over Valid
Valid Range
Range
Decrease the traffic level by
packets per
using a switch to segment the
second.*
network.
Less than 2 times
Decrease the traffic level by
the number of good
using a switch to segment the
packets.
network
Replace bad cables and/or
transceivers if problems persist.
Rarely, you may have a
defective LAN adapter.
Less than.1% of
Too many repeaters between
good packets.
end nodes, or cables which are
too long, or bad cable.
Less than.1% of
This counter indicates faulty
good packets.
cabling.
Less than.1% of
Update the LAN adapter drivers
good packets.
on all nodes connected to the
port.
Less than 200
Decrease the number of nodes
packets per
in an IP subnet or IPX network
second.*
by using more routers. Consult
Novell Netware documentation
on how to reduce broadcasts in
an IPX network.
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