User`s guide

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Introduction

• Transmit IP multicast packets as single route explorer packets.

• Transmit subnet-speciﬁc broadcasts as single route explorer

packets.

1.8.5 Conﬁguring IP Routing Over Source Routing

The IP routing over source-routing feature is integrated with the

multiple IP networks per ATX port feature. Conﬁguration is

speciﬁed for each binding of an IP subnet.

• No source-routing - ARP requests are sent as transparent

explorer packet. This is normal for non-Token Ring LANs.

• Source-routing - ARP requests are transmitted as source-routing

explorer packets. This is the default for most TCP/IP

implementations on a Token Ring LAN.

• Both transparent and source-routing - Two ARP requests are

transmitted; one transparent and one explorer. This provides the

best connectivity where it is not known whether the intended

destination is capable of source-routing.

• Default - If the port is Token Ring, both types of ARP requests

are transmitted. For other LAN types, ARP requests are sent as

transparent frames.

Conﬁguration is provided by the sipckt

portion of the Cabletron

proprietary MIB. The sipNetToMedia Table, within the

Cabletron proprietary MIB, allows you to manage the source route

as part of the ARP cache. See the ATX MIB Reference Guide for

information on sipckt and the sipNetToMedia Table.

1.8.6 IPX Routing

The ATX can route Internetwork Packet Exchange (IPX) packets.

IPX is Novell’s protocol that allows users in a Netware

internetwork to communicate. The ATX identiﬁes IPX packets and

routes them appropriately.