Juniper JUNOSE 10.0.X PHYSICAL LAYER, Configuration Manual

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Primary/Secondary link signal detected, Primary/Secondary link signal not
detected—Specifies the port (primary or secondary) on which the router
detects a signal (not displayed on GE I/O modules that do not support SFPs)
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5 minute input rate—Data rates based on the traffic received in the last 5
minutes
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5 minute output rate—Data rates based on the traffic sent in the last 5
minutes
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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
Monitoring Ethernet Interfaces
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Chapter 5: Configuring Ethernet Interfaces