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Chapter 4: Configuration Overview
The Type 20 IPX packet is used specifically for this purpose. This
causes special handling of this packet by the Router Option Module.
When a router receives this type of packet, it rebroadcasts it across
all interfaces except the one it is received on and includes the net-
work 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 slower links with bandwidths of
less than 1 Mbps (like ISDN). However, when set to Pass (def), the
Router Option Module 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 Router Option Module will attempt to ne-
gotiate PPP BCP with the PPP peer. Bridging can be used even in
route mode only if the PPP peer cannot support certain PPP proto-
cols for that particular routing protocol. See Bridge/WAN IP Bridge
and Bridge/WAN IPX Bridge on page page 4-14 for further details.
PPP Profile/PPP
The Router Option Module supports the IETF standards for the
Point-to-Point Protocol. The PPP state machine running in the Rout-
er Option Module 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 set to On, the Router Option Module will perform TCP/IP
header compression known as Van Jacobson compression to the
PPP peer. Normally, this is not necessary over ISDN connections.
Set to Off (def) to disable it.
4-40
Router Option Module User Manual
61200350L1-1
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