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MLFR Frame Relay Forum

JUNOS supports FRF.12 fragmentation header formats for both FRF.15 (MLFR) and FRF.16 (MFR).

MLFR Frame Relay Forum 15 (FRF.15) combines multiple permanent virtual circuits (PVCs) into one aggregated virtual circuit (AVC). This process provides fragmentation over multiple PVCs on one end and reassembly of the AVC on the other end. MLFR FRF.15 is supported on the ls-0/0/0 interface.

MLFR FRF.16 is supported on the ls-0/0/0:channel, which carries a single MLFR FRF.16 bundle. MLFR FRF.16 combines multiple links to form one logical link. Packet fragmentation and reassembly occur on each virtual circuit. Each bundle can support multiple virtual circuits.

Note: If you configure a permanent virtual circuit (PVC) between T1, E1, T3, or E3 interfaces in J-series device and another vendor, and the other vendor does not have the same FRF.12 support or supports FRF.12 in a different way, the devices interface might discard a fragmented packet containing FRF.12 headers and count it as a "Policed Discard." Therefore, when you configure a PVC between T1, E1, T3, or E3 interfaces in the devices and another vendor, you should configure multilink bundles on both peers and configure fragmentation thresholds on the multilink bundle.

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