Mapping 802.1 to IP Precedence

• This is easy !

  • Both are three bits, eight levels, strict priority (except for IEEE re-arrangement of levels 0,1,2)

• This is useful !

  • Good way to carry 802.1 CoS information across router into other networks

• This is happening !

  • Router forwarding rules (RFC 1812) already require mapping of IP Precedence to any available Layer 2 priorities
  • 3Com Dynamic Access is capable of setting both 802.1p and IP Precedence levels the same

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