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

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In—Analysis of inbound traffic on this interface
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Bytes—Number of bytes received in error-free packets
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Unicast—Number of unicast packets received
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Multicast—Number of multicast packets received
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Broadcast—Number of broadcast packets received
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Errors—Total number of errors in all received packets; some packets
might contain more than one error
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Discards—Total number of discarded incoming packets
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Mac Errors—Number of incoming packets discarded because of MAC
sublayer failures
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Alignment—Number of incomplete octets received
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CRC—Number of packets discarded because the checksum that the
router computed from the data does not match the checksum generated
by the originating devices
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Too Longs—Number of packets discarded because the size exceeded
the MTU
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Symbol Errors—Number of symbols received that the router did not
correctly decode
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Out—Analysis of outbound traffic on this interface
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Bytes—Number of bytes sent
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Unicast—Number of unicast packets sent
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Multicast—Number of multicast packets sent
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Broadcast—Number of broadcast packets sent
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Errors—Total number of errors in all transmitted packets; note that some
packets might contain more than one error
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Discards—Total number of discarded outgoing packets
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Mac Errors—Number of outgoing packets discarded because of MAC
sublayer failures
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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.
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No Carrier—Number of packets sent when carrier sense was unavailable
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Collisions—Analysis of the collisions that occurred
Monitoring Upper-Level Protocols over Ethernet
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Chapter 4: Configuring Upper-Layer Protocols over Static Ethernet Interfaces