Installation and Reference Guide (J3210A, J3212A, J3200A, J3202A, J3204A) 1996-08

3-9
Configuring the Switching Hubs in Software
Using the Console
Configuring the Switching
Hubs in Software
Segment Counters
The Segment counters are from the RFC 1757 RMON MIB Specification. Their
definition of counters is different than IEEE 802.3 Repeater Management
Specification as describe din this table.
Counter Name Definition Valid Range Corrective Action if over Valid
Range
Good/Bad Packets Number of error free and errored pack-
ets.
Less than 4000 pack-
ets per second.*
Decrease the traffic level by
using a switch to segment the
network.
Total Octets Number of errored and error free bytes
received. Shows utilization of the net-
work. Ethernet capability is 1.25 mega-
bytes per second.
Less than 500,000
bytes per second
sustained (not just at
the peak)
Decrease the traffic level by
using a switch to segment the
network.
Broadcast Packets The number of packets addressed to ev-
eryone on the network. These packets
consume CPU resource from each node
on the network.
Less than 200
packets per sec-
ond.*
Decrease the number of nodes
in an IP subnet or IPX network
by using more routers. Consult
Novell Netware documenta-
tion on how to reduce broad-
casts in an IPX network.
Multicast Packets Number of packets sent to two or more
nodes on the network, but not to broad-
cast.
Less than 4000 pack-
ets per second.*
Segment network and config-
ure switches to filter unneces-
sary multicast packets.
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.
Less than 2 times the
number of good
packets.
Decrease the traffic level by
using a switch to segment the
network
Replace bad cables and/or
transceivers if problems per-
sist. Rarely, you may have a
defective LAN adapter.
CRC Alignment
Errors
Number of packets transmitted incor-
rectly and number of incorrectly aligned
packets.
Collisions +
fragments should be
less than 2 times the
# of packets
Segment the network.
Update the LAN adapter driv-
ers.
Fragments Number of collisions on a distant seg-
ment in the network.
Collisions +
fragments should be
less than 2 times the
# of packets
Segment the network.
Update the LAN adapter driv-
ers.
Jabbers Number of error packets that are longer
than 20 milliseconds in duration.
Less than.1% of
packets
Replace defective hardware
such as the transceiver.
*The segment counters in the ASCII console show totals, not number of packets per second. For the Good/Bad Packets,
Multicast, and Broadcast packets, display counters twice over a period of one section to see if the value falls in the
valid range.