Chapter 25: WAN Configuration Guide336 SmartSwitch Router User Reference ManualThe following command line displays an example for a VLAN:Forcing Bridged EncapsulationWAN for the SSR has the ability to force bridged packet encapsulation. This feature hasbeen provided to facilitate seamless compatibility with Cisco routers, which expectbridged encapsulation in certain operating modes.The following command line displays an example for Frame Relay:The following command line displays an example for PPP:Packet CompressionPacket compression can increase throughput and shorten the times needed for datatransmission. You can enable packet compression for Frame Relay VCs and for PPP ports,however, both ends of a link must be configured to use packet compression.Enabling compression on WAN serial links should be decided on a case by case basis.Important factors to consider include:• average packet size• nature of the data• link integrity• latency requirementsEach of these factors is discussed in more detail in the following sections and should betaken into consideration before enabling compression. Since the factors are dependent onthe environment, you should first try running with compression histories enabled. Ifcompression statistics do not show a very good long-term compression ratio, then selectthe “no history” option. If the compression statistics do not improve or show a ration ofless than 1, then compression should be disabled altogether.interface create ip IPWAN address-netmask 10.50.1.1/16 vlan BLUEframe-relay set fr-encaps-bgd ports hs.5.2.19ppp set ppp-encaps-bgd ports hs.5.2
