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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
PPP peer 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.
PPP Profile/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 for special cases.
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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Chapter 3: Terminal Menu Operation and Structure
Express L768/L1.5 User Manual
61
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