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7.5. Traffic Marking (traffic-marking) Sub-Type 0x09

7.5. Traffic Marking (traffic-marking) Sub-Type 0x09​

The traffic marking Extended Community instructs a system to modify the DSCP bits in the IP header (Section 3 of [RFC2474]) of a transiting IP packet to the corresponding value encoded in the 6 least significant bits of the Extended Community value, as shown in Figure 6.

The Extended Community is encoded as follows:

   0                   1                   2                   3
   0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  |   reserved    |   reserved    |   reserved    |   reserved    |
  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  |   reserved    | r.|    DSCP   |
  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

        Figure 6: Traffic Marking Extended Community Encoding

DSCP: new DSCP value for the transiting IP packet

reserved (r): MUST be set to 0 on encoding and MUST be ignored during decoding

Interferes with: No other BGP Flow Specification Traffic Filtering Action in this document.

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