AIS AI2524 user manual Customize Frame Relay for Your Network, Configure Frame Relay Subinterfaces

AI2524 Router Card User’s Manual

Customize Frame Relay for Your Network

Perform these tasks to customize Frame Relay:

zConfigure Frame Relay Subinterfaces

zConfigure Frame Relay Switching

zDisable or Reenable Frame Relay Inverse ARP

zCreate a Broadcast Queue for an Interface

zConfigure Payload Compression

zConfigure TCP/IP Header Compression

zConfigure Discard Eligibility

zConfigure DLCI Priority Levels

Configure Frame Relay Subinterfaces

To understand and define Frame Relay Subinterfaces, perform these tasks:

zUnderstand Frame Relay Subinterfaces

zDefine Frame Relay Subinterfaces

zDefine Subinterface Addressing

After these tasks are completed, you can also perform these optional tasks:

zConfigure Transparent Bridging for Frame Relay

zConfigure a Backup Interface for a Subinterface

Understand Frame Relay Subinterfaces

Frame Relay subinterfaces provide a mechanism for supporting par- tially meshed Frame Relay networks. Most protocols assume transitiv- ity on a logical network; that is, if station A can talk to station B, and station B can talk to station C, then station A should be able to talk to station C directly. Transitivity is true on LANs, but not on Fram Relay networks unless A is directly connected to C.

Additionally, certain protocols such as transparent bridging cannot b supported on partially meshed networks because they require "split horizon," in which a packet received on an interface cannot be trans mitted out the same interface even if the packet is received and trans mitted on different virtual circuits.

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