ADTRAN L768 user manual PPP Profile/Bridge, PPP Profile/PPP, PPP/VJ Compression

Chapter 3: Terminal Menu Operation and Structure

this purpose. This causes special handling of this packet by the Express L768/ L1.5. When a router receives this type of packet, it rebroadcasts it across all interfaces except the one it is received on and includes the network number of that interface in the data portion of the packet. The IPX Router Specification from Novell notes that Type 20 packets should not be propagated across slow- er links with bandwidths of less than 1Mbps (like ISDN). However, when set to Pass (def), the Express L768/L1.5 will allow these packets to propagate over the WAN connection. This facilitates dial-on-demand applications. When set to Block, all Type 20 packets are not propagated across the WAN connection.

PPP Profile/Bridge

The Bridge menu contains the parameters needed for exchanging bridged packets with the PPP peer.

Bridge/Mode

Write security: 3; Read security: 5

When set to On (def), the Express L768/L1.5 will attempt to negotiate PPP BCP with the PPP peer. Bridging can be used even in route mode only if the

PPPpeer cannot support certain PPP protocols for that particular routing pro- tocol. See Bridge/WAN IP Bridge on page 36 and Bridge/WAN IPX Bridge on page 37 for further details.

PPPProfile/PPP

The Express L768/L1.5 supports the IETF standards for the Point-to-Point Pro- tocol. The PPP state machine running in the Express L768/L1.5 can be fine- tuned to support many applications that can be employed. The configurable items under this menu can be changed from their default values forspecialcases.

PPP/VJ Compression

Write security: 3; Read security: 5

When this item is set to On, the Express L768/L1.5 will perform TCP/IP head- er compression known as Van Jacobson compression to the PPP peer. Normal- ly, this is not necessary over ISDN connections and can be set to Off (def) to disable it.

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