Design Reference

Figure 6: 1000BASE-X RFI
End-to-end fault detection and VLACP
Because remote fault indication (RFI) terminates at the next Ethernet hop, the device that uses
only RFI cannot determine failures on an end-to-end basis over multiple hops.
However, you can use Virtual Link Aggregation Control Protocol (VLACP) to provide an end-
to-end failure detection mechanism. You can configure VLACP on a port and enable it over
single links or Multilink trunks (MLT).
Link redundancy
36 Network Design Reference for Avaya VSP 4000 February 2014
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