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Optional FCS Retention for Ethernet, Frame Relay, and HDLC/PPP Port Mode

Optional FCS Retention for Ethernet, Frame Relay, and HDLC/PPP Port Mode. Current specifications leave payloads vulnerable to undetected accidental or deliberate alterations in the encapsulating network

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Optional FCS Retention for Ethernet, Frame Relay, and HDLC/PPP Port Mode

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  1. Optional FCS Retention for Ethernet, Frame Relay, and HDLC/PPP Port Mode • Current specifications leave payloads vulnerable to undetected accidental or deliberate alterations in the encapsulating network • Provide end customers a service where transparency and non-alteration of end-to-end frames is guaranteed • Security enhancement • Optional for vendors and service providers • Signaling is backward compatible with current drafts • Nothing comes for free; adds the overhead of transporting the FCS end-to-end in every frame

  2. draft-malis-pwe3-fcs-retention-00.txt • From Andrew Malis, David Allan, Nick Del Regno • Distributed on mailing list this morning, will be submitted following Minneapolis meeting • Default behavior is that FCS is NOT retained • Defines a new VC element parameter ID, FCS Retention Indicator, used to signal the desire to retain the FCS when advertising a VC label • FCS is retained in either direction ONLY if the FCS Retention Indicator has been included in the label mapping messages for both directions on a pseudowire • Backwards compatible, since unknown parameter IDs are silently ignored

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