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FAQ-Why the FR Link Protocol Cannot Go Up

Publication Date:  2015-04-30 Views:  641 Downloads:  0

Issue Description

Why the FR Link Protocol Cannot Go Up?


The possible cause is that the interface configurations on the two ends are incorrect, including:
  • The interface types must be DTE on one end and DCE on the other end.
  • The DLCI is not configured on the interface or the DLCI range setting is incorrect. The DLCI ranges from 16 to 1022.
  • The FR Local Management Interface (LMI) protocol types are different.
  • The FR encapsulation formats configured on the two ends are different. When the FR protocol is used as the encapsulation protocol, the default frame encapsulation format is IETF.
  • If the E1/T1 board is used, the interface TSs on the two ends do not completely match.