MTP3:Link Statistics

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The following link-related statistics are available for query/display:

  • The 'Number of changeover transmit' counter indicates the number of changeover orders transmitted for this link
  • The 'Number of changeover received' counter indicates the number of changeover orders received for this link
  • The 'Number of changeover acknowledgment transmit' counter indicates the number of changeover acknowledgments transmitted for this link
  • The 'Number of changeover acknowledgment received' counter indicates the number of changeover acknowledgments received for this link
  • The 'Number of changeback transmit' counter indicates the number of changeback declarations transmitted on this link
  • The 'Number of changeback received' counter indicates the number of changeback declarations received on this link
  • The 'Number of changeback acknowledgment transmit' counter indicates the number of changeback acknowledgments transmitted for this link
  • The 'Number of changeback acknowledgment received' counter indicates the number of changeback acknowledgments received for this link
  • The 'Number of emergency changeover transmit' counter indicates the number of emergency changeover transmitted for this link
  • The 'Number of emergency changeover received' counter indicates the number of emergency changeover received for this link
  • The 'Number of emergency changeover acknowledgment transmit' counter indicates the number of emergency changeover acknowledgment transmitted for this link
  • The 'Number of emergency changeover acknowledgment received' counter indicates the number of emergency changeover acknowledgments received for this link
  • The 'Number of link inhibit transmit' counter indicates the number of link inhibits transmitted for this link
  • The 'Number of link inhibit received' counter indicates the number of link inhibits received for this link
  • The 'Number of link inhibit acknowledgment transmit' counter indicates the number of link inhibit acknowledgments transmitted for this link
  • The 'Number of link inhibit acknowledgment received' counter indicates the number of link inhibit acknowledgments received for this link
  • The 'Number of link inhibit denied transmit' counter indicates the number of link inhibit denied transmitted for this link
  • The 'Number of link inhibit denied received' counter indicates the number of link inhibit denied received for this link
  • The 'Number of link uninhibit transmit' counter indicates the number of link uninhibits transmitted for this link
  • The 'Number of link uninhibit received' counter indicates the number of link uninhibits received for this link
  • The 'Number of link uninhibit acknowledgment transmit' counter indicates the number of link uninhibit acknowledgments transmitted for this link
  • The 'Number of link uninhibit acknowledgment received' counter indicates the number of link uninhibit acknowledgments received for this link
  • The 'Number of link force uninhibit transmit' counter indicates the number of link force uninhibits transmitted for this link
  • The 'Number of link force uninhibit received' counter indicates the number of link force uninhibits received for this link
  • The 'Number of local link inhibit test transmit' counter indicates the number of local link inhibit tests transmitted for this link
  • The 'Number of local link inhibit test received' counter indicates the number of local link inhibit test received for this link
  • The 'Number of remote link inhibit test transmit' counter indicates the number of remote link inhibit test transmitted for this link
  • The 'Number of remote link inhibit test received' counter indicates the number of remote link inhibit test received for this link.
  • The 'Number of link connection order transmit' counter indicates the number of link connection order transmitted for this link
  • The 'Number of link connection order received' counter indicates the number of link connection order received for this link
  • The 'Number of link connection acknowledgment transmit' counter indicates the number of link connection acknowledgment transmitted for this link
  • The 'Number of link connection acknowledgment received' counter indicates the number of link connection acknowledgment received for this link
  • The 'Number of link test transmit' counter indicates the number of signaling link test message transmitted on this link
  • The 'Number of link test received' counter indicates the number of signaling link test messages received on this link
  • The 'Number of link test acknowledgment transmit' counter indicates the number of signaling link test acknowledgment messages transmitted on this link
  • The 'Number of link test acknowledgement received' counter indicates the number of signaling link test acknowledgement messages received on this link
  • The 'Number of transmit MSU dropped' counter. A message to be transmitted cannot be sent and consequently is dropped. This may occur for the following reasons:
    • There is an error in encoding the message
    • The size of the message is illegal
    • The link is congested and a message is a COO or ECO. Changeover messages are not queued, as congestion abatement at a later time may bring down the link for which the changeover was previously sent
    • A message retrieved from layer2 during changeover cannot be decoded or contains an illegal field
  • The 'Number of transmit MSU dropped due to congestion' counter indicates the number of MSUs dropped because of congestion on this link
  • The 'Number of SIF byte transmit' counter indicates the number of SIF octets transmitted on this link
  • The 'Number of SIF byte received' counter indicates the number of SIF octets received on this link.
  • The 'Number of SIO byte transmit' counter indicates the number of SIO octets transmitted on this link
  • The 'Number of SIO byte received' counter indicates the number of SIO octets received on this link
  • The 'Number of MSU transmit' counter indicates the number of MSUs transmitted on this link
  • The 'Number of MSU received' counter indicates the number of MSUs received on this link
  • The 'Number of link congestion set level 1' counter indicates the number of link congestion set at threshold 1
  • The 'Number of link congestion set level 2' counter indicates the number of link congestion set at threshold 2
  • The 'Number of link congestion set level 3' counter indicates the number of link congestion set at threshold 3
  • The 'Number of link unavailability' counter indicates the duration of link unavailability expressed in milliseconds
  • The 'Number of link congested' counter indicates the duration of link congestion expressed in milliseconds
  • The 'Number of invalid PDU received' counter indicates the number of invalid PDU received on this link. This may reflect one of the following conditions:
    • There is an error in encoding the message
    • PDU has a wrong size. That is, less than the minimum allowed or more than the maximum allowed
    • Length of PDU cannot be found
    • PDU cannot be decoded
    • PDU contains illegal SLS value
    • PDU is received in an invalid link state
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