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... [ARCH]. It is possible to use Frame Relay switches as Label
Switching Routers. Such Frame Relay switches ...
...
When a Frame Relay switch is used for label switching, the top
(current) label, on which forwarding decisions are based, is carried
...
... DLCIs would be used as MPLS
Labels and the Frame Relay switches would become Frame Relay Label
Switching Routers, while the MPLS ...
... Special characteristics of Frame Relay Switches ...
... although in a standard switch it may be possible to configure
multiple input DLCIs to one output DLCI ...
... This document describes ways of applying label switching to Frame
Relay switches, which work within these constraints.
...
... configuration, similar to configuring the DLCI used to run IP routing
protocols between the switches.
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... MPLS networks which contain a combination of
Frame Relay switches operating as LSRs, and other LSRs, which operate
...
... LSP segment", the FR-LSR MUST not label switch
the packet, but rather follow the specifications in [STACK] in an
...
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To support label switching a Frame Relay Switch MUST implement the
control component of label switching, which consists primarily of
...
... layer routing protocols, this implies that the
switch MUST participate as a peer in these protocols (e.g., OSPF,
IS-IS ...
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Support of label switching on a Frame Relay switch requires
conformance only to [FRF] (framing, bit-stuffing ...
... Hybrid Switches (Ships in the Night) ...
...
The existence of the label switching control component on a Frame
Relay switch does not preclude the ability to support the Frame Relay
control component defined by the ITU ...
... ITU and Frame Relay Forum on the
same switch and the same interfaces (NICs). The two control
components, label switching ...