Juniper JUNOSE 11.1.X - LINK LAYER CONFIGURATION 4-7-2010 Configuration Manual page 193

Chapter 4: Configuring Upper-Layer Protocols over Static Ethernet Interfaces
Bytes Number of bytes received in error-free packets
Unicast Number of unicast packets received
Multicast Number of multicast packets received
Broadcast Number of broadcast packets received
Errors Total number of errors in all received packets; some packets
might contain more than one error
Discards Total number of discarded incoming packets
Mac Errors Number of incoming packets discarded because of MAC
sublayer failures
Alignment Number of incomplete octets received
CRC Number of packets discarded because the checksum the router
computed from the data does not match the checksum generated by
the originating devices
Too Longs Number of packets discarded because the size exceeded
the MTU
Symbol Errors Number of symbols received that the router did not
correctly decode
Out Analysis of outbound traffic on this interface
Bytes Number of bytes sent
Unicast Number of unicast packets sent
Multicast Number of multicast packets sent
Broadcast Number of broadcast packets sent
Errors Total number of errors in all transmitted packets; some packets
might contain more than one error
Discards Total number of discarded outgoing packets
Mac Errors Number of outgoing packets discarded because of MAC
sublayer failures
Deferred Number of packets that the router delayed sending because
the line was busy. In half duplex mode, a high number of deferrals
means the link is very busy with traffic from other stations. In full duplex
mode, when the link is always available for transmission, this number
is zero.
No Carrier Number of packets sent when carrier sense was unavailable
Collisions Analysis of the collisions that occurred
Single—Number of packets sent after one collision
Multiple—Number of packets sent after multiple collisions
Monitoring Upper-Level Protocols over Ethernet
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