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The show ethernet commands display information specifically about the Ethernet ports in the device.
show ethernet {addresses | statistics}
addresses | This command displays the hardware address of the Ethernet chip for each interface. This can be helpful in debugging network problems. |
statistics | This command displays tallies for all ports returned from the Ethernet chip(s) for various types of conditions and exceptions. |
The Statistic Types and what they mean are described below:
Packets In | This is the total number of packets taken in on this interface. |
Packets Out | This is the total number of packets sent out this interface. |
CRC Errors | This is the number of packets that contained CRC (Cyclical Redundancy Check) errors on packets received. |
Frame Errors | This is the number of packets that had frame alignment errors on packets received. |
Overruns | This is the number of receive FIFO (First In First Out) overruns detected. FIFO is a method of queuing packets. |
Underruns | This is the number of transmit FIFO underruns detected. |
Loopback Pkts | This is the number of loopback packets received. |
Missed Pkts | This is the number of packets missed due to buffer overflow. |
Receive Error | This is the number of packets where an error was detected in the packet header. |
Transmit Error | This is the number of packets that were not sent due to a transmit error. |
Post Send | This is the number of packets queued to be sent. It should be nearly the same as, if not identical to, Packets Out. |
Bad Length | This is the number of packets received that had an invalid length. |
Receive Int | This is the number of times that the processor was interrupted to receive a packet. It should be nearly the same as, if not identical to, Packets In. |
Transmit Err Int | This is the number of processor interrupts for transmit errors. |
Collisions | This is the number of packet collisions detected during packet transmission. |
Rcv Desc Exhaust | This is the number of times that the received descriptors were exhausted. |
Rcv Buf Exhaust | This is the number of times that the receive buffer area was exceeded. |
RBA Exceeded | This is the number of packets received that were oversized (greater than 1514 bytes). |
Bad RDA | This is the number of times a bad receive descriptor array was detected. |
Hung Transmit | This is the number of times a transmitter hang was detected and reset. |
Iface discard | This is the number of packets discarded when the router transmit resources were exhausted. |
Cntr Oflow | This is the number of times the Ethernet chip counters were exceeded. |
The following sections show an example for each command.
The following is output from the show ethernet addresses command for a two-port router:
Ethernet Address: 00:00:a5:77:2c:00 Ethernet Address: 00:00:a5:77:2c:01
The following is output from the show ethernet statistics command. The number of columns will vary depending on the number of Ethernet interfaces.
Statistic Type Ether0 Ether1 Packets In 390095 337345 Packets Out 334093 291833 CRC Errors 0 0 Frame Errors 0 0 Overruns 0 0 Underruns 0 0 Loopback Pkts 0 0 Missed Pkts 0 0 Receive Error 0 0 Transmit Error 2 0 Post Send 334095 291833 Bad Length 0 0 Receive Int 389222 337182 Transmit Err Int 0 0 Collisions 0 0 Rcv Desc Exhaust 0 0 Rcv Buf Exhaust 0 0 RBA Exceeded 0 0 Bad RDA 0 0 Hung Transmit 0 0 Iface discard 0 0
As this display suggests, many of the statistics should be zero.
| Command | Description |
|---|---|
configure Ethernet Interface | Configures Ethernet parameters for an interface |
Posted: Wed Sep 27 11:27:25 PDT 2000
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