The bit-interleaved parity with sixteen bit errors (BIP-16) is generated when the BFrame is created on the ingress and which stays with it until the cell is extracted on the egress of the switch. The TX BIP-16 error count is taken at the BIF-TX as the BFrame is transmitted onto the backplane.
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Because the data path up to the BIF-TX is on a single card, TX BIP-16 errors indicate an error on the reporting card, which makes isolating the fault easy. The errors indicate corruption of the BFrame which should appear as either BFrame Parity or Payload errors on the trunk or port statistics of the receiving card.
Follow the instructions provided below to clear TX BIP-16 errors:
Replace the card on which the Tx BIP-16 errors occur.
A hardware problem usually results in the maximum rate count being logged, but can occur only if traffic flows through the card. If less than the maximum rate is seen, it is possible that the configuration of the BFrame header for one particular channel may be incorrect. However, a hardware failure could cause this as well.
If replacing the card does not resolve the errors, or if errors are occurring on multiple cards, use the switchcc command to isolate the source of the error if the backplane or crosspoint matrix are involved.
TX BIP-16 errors on multiple cards have been linked to specific configuration and heavy data loads for BPX Controller Card-3 (BCC-3) and BCC-3-32 processor cards. Upgrading both processors to BCC-4V, which allows for faster performance, can resolve the errors.
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