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DI-1162/DI-1162M Remote Access Router
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Tx Bytes –
The total number of bytes transmitted by the router.
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Tx Discard Packets –
The number of packets dropped by the router.
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Tx Error Packets –
The number of invalid packets transmitted by the router. This hardware counter shows the
sum of Collisions, Abort, and Underrun packets.
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Tx Collision Packets –
The number of packets sent out of the router that collided on the line. Some collisions
are inevitable due to the shared nature of Ethernet. Excessive collisions show excessive utilization of the
network.
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Tx Abort Packets –
When the router transmits a packet and a collision occurs, the router will wait a random
period and try to retransmit the packet. If a collision occurs 16 times in a row, the transmission will be aborted
and be logged by this counter. An aborted packet shows extremely heavy utilization of the network.
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Tx Underrun Packets –
Runt packets. The number of packets transmitted by the router that are less than the
allowed 64 octets minimum length. Underrun packets occur due to jam signals generated by collisions,
backpressure, etc.
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Rx Packets –
The number of valid packets received by the router.
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Rx Bytes –
The total number of bytes contained in the valid packets received by the router.
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Rx Unknown Packets –
The number of packets received by the router that were of an unsupported protocol.
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Rx Discard Packets –
The number of packets dropped by the router.
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Rx Error Packets –
The number of invalid packets received by the router. This hardware counter shows the
sum of CRC, FAE, Overrun, MPA and DFR error packets.
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Rx CRC Packets –
The number of packets received that failed the CRC checksum test.
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Rx FAE Packets –
Frame Alignment Error. The
number of packets received that does not end on a byte
boundary and the CRC does not match.
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Rx Overrun Packets –
The number of packets received that exceed the 1518-octet maximum length imposed
on Ethernet packets. Overrun packets are generated by some proprietary software applications.
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Rx MPA Packets –
Missed Packet. This is a count of packets intended for the router, but at the time, the
router could not receive the packet (usually due to the temporary lack of receive buffers).
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Rx DFR Packets –
Deferred Packets. This is a count of incidents where CRS (carrier signal lost) and COL
both occur at the same time. These two events happen simultaneously as a result of jabber (produced by faulty
networking equipment, usually NIC’s).