Technical data

14 Brocade 6910 Ethernet Access Switch Diagnostic Guide
53-1002348-02
Ethernet diagnostics
Because the full-duplex device does not expect incoming frames to be truncated by collision
detection, the device reports Frame Check Sequence (FCS) errors. The combination of late
collisions reported at the half-duplex end, and FCS errors reported by the full-duplex end, can
indicate a duplex mismatch.
Ethernet show commands
This section describes the show commands that display information about Ethernet interfaces.
show interfaces brief
Syntax: show interfaces brief
This command displays a summary of the information provided in the show interfaces command.
Command output resembles the following example.
Console# show interfaces brief
Interface Name Status PVID Pri Speed/Duplex Type Trunk
--------- ------------------ -------- ---- --- ------------- ------------ -----
Eth 1/ 1 Up 1 0 Auto-100full 1000T None
Eth 1/ 2 Down 1 0 Auto 1000Base SFP None
show interfaces counters ethernet
Syntax: show interfaces counters ethernet unit/port
unit - Unit identifier. (Range: 1)
port - Port number. (Range: 1-12)
This command displays statistics about a specific Ethernet interface, as shown in the following
example.
Console# show interfaces counters ethernet 1/1
Ethernet 1/ 1
===== IF table Stats =====
1562954 Octets Input
5265175 Octets Output
5389 Unicast Input
6254 Unicast Output
0 Discard Input
0 Discard Output
0 Error Input
0 Error Output
0 Unknown Protos Input
0 QLen Output
===== Extended Iftable Stats =====
10446 Multi-cast Input
11128 Multi-cast Output
313 Broadcast Input
2 Broadcast Output
===== Ether-like Stats =====
0 Alignment Errors
0 FCS Errors
0 Single Collision Frames
0 Multiple Collision Frames
0 SQE Test Errors
0 Deferred Transmissions
0 Late Collisions
0 Excessive Collisions
0 Pause Frames Output