Frame Relay Frame Structure

• Address Field of Frame Relay Frame

  • If address field is 2 octets long, DLCI is 10 bits long
  • If address field is 3 octets long, DLCI is 17 bits long
  • If address field is 4 octets long, DLCI is 24 bits long

0

7

DLCI (6 bits)

C/R

AE

DLCI (4 bits)

FECN

BECN

DE

AE

DLCI (7 bits)

AE

DLCI (7 bits)

AE

Bits

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