Configuration Guide for A7000 dl T1 and E1 WAN Interfaces 2005-12

Configuring the Frame Relay Interfaces (and Sub-Interfaces) Understanding SROS Queuing Methods
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Specify the Frame Relay sub-interface configuration parameters on the DLCI Configuration page:
Click Apply to create the Frame Relay sub-interface.
Multilink Frame Relay Operation
Multilink Frame Relay operation increases bandwidth on your Frame Relay service by aggregating
multiple physical links into a single logical bundle. All the physical links in a multilink bundle are
treated as a single entity by the system, allowing each PVC on the connection to dynamically share the
total bandwidth of the bundle. Single data packets can be fragmented into smaller pieces which may or
may not be transmitted to the network over the same physical link. Multilink Frame Relay devices
balance the transmitted information to evenly use all the physical links in a bundle.
SROS products support multilink Frame Relay (FRF.16), requiring that the multilink operation be
supported from the network provider. Remote side Frame Relay connections are unaffected by
multilink operation; the multilink FRF.16 functionality provides an effective way to increase the total
bandwidth at a single site between the Frame Relay device and the network provider.
Physical links can be dynamically added and removed from the logical bundle, so a failure on one
physical link does not halt the overall operation of the bundle. Since all PVCs have access to the entire
bundle bandwidth, failure of a single physical connection in the bundle does not decrease efficiency.
Multilink Frame Relay requires minimal configuration in your SROS product. You must first enable
multilink operation on the Frame Relay interface (not sub-interface) and then bind the multiple
physical interfaces to the single Frame Relay interface. Optionally, you can set a bundle ID (label for