3com 5104M-FIB User Manual
SHOW COUNTER
2-325
Example 1
The following command displays counter error statistics for Ethernet network 1.
Some modules report a Late Collision if the collision becomes active after 512
bits from the start of the transmission. Other modules log Late Collisions if the
collision is active exactly 512 bit times, even if the collision was asserted before
512 bit times.
bits from the start of the transmission. Other modules log Late Collisions if the
collision is active exactly 512 bit times, even if the collision was asserted before
512 bit times.
CB5000> show counter ethernet ethernet_1
Ethernet Statistics for ETHERNET_1
-------------------------------------------------------------------
FCS Errors
0
SQE Test Errors
58
Alignment Errors 0
Carrier Sense Errors
1
Frame Too Longs
0
Deferred Transmissions
5
Late Collisions 0
Excessive Collisions
0
Single Collision Frames
3
Multiple Collision Frames 0
Internal MAC Receive Errors
6
Internal MAC Transmit Errors
0
Each error type is followed by the number of packets received that contains that
error.
error.
tr_promiscuous
Specifies that you want to display counter error statistics from the
Token Ring promiscuous error counter.
Token Ring promiscuous error counter.
tr_source_routing Specifies that you want to display counter error statistics from the
Token Ring source routing error counter.
token_ring
Specifies that you want to display counter statistics for a Token Ring
network.
network.
token ring
Identifies the Token Ring network.
vbridge
Specifies that you want to display the number of Spanning Tree
topology changes and learned entry discards for a SwitchModule
virtual bridge.
topology changes and learned entry discards for a SwitchModule
virtual bridge.
1 through 256
Identifies the vbridge for which you want to display counter statistics.
Field
Description
FCS Errors
Frame Check Sequence errors.
SQE Test Errors
Errors during Signal Quality Error test.
Alignment Errors
Number of CRC errors that do not end on a byte boundary.
Carrier Sense Errors
Loss of carrier sense detected.
Frame Too Longs
Too long errors received (packets greater than 1518 bytes).
Deferred Transmissions
Channel busy when sender ready to transmit. Sender retries.
Late Collisions
Collision occurs late in packet. No retry.
Excessive Collisions
More than 16 retries on the same packet.
Single Collision Frames
1 retry needed to send packet.
Multiple Collision Frames
2 to 15 retries needed to send packet.
Internal MAC Receive Errors
Lost packets during receive.
Internal MAC Transmit Errors
Lost packets during send.