Ipx Mib Support; Ipx Enhanced Igrp Support - Cisco WS C4224V 8FXS - 200Mbps Ethernet Switch Software Configuration Manual

Novell IPX

IPX MIB Support

IPX Enhanced IGRP Support

Catalyst 4224 Access Gateway Switch Software Configuration Guide
12-2
Cisco supports the IPX MIB (currently, read-only access is supported). The IPX
Accounting group represents one of the local Cisco-specific IPX variables Cisco
supports. This group provides access to the active database that is created and
maintained if IPX accounting is enabled on a router or access server.
Cisco IOS software supports IPX Enhanced IGRP, which provides the following
features:
Automatic redistribution—IPX Routing Information Protocol (RIP) routes
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are automatically redistributed into Enhanced IGRP, and Enhanced IGRP
routes are automatically redistributed into RIP. If desired, you can turn off
redistribution. You also can completely turn off Enhanced IGRP and IPX RIP
on the device or on individual interfaces.
Increased network width—With IPX RIP, the largest possible width of your
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network is 15 hops. When Enhanced IGRP is enabled, the largest possible
width is 224 hops. Because the Enhanced IGRP metric is large enough to
support thousands of hops, the only barrier to expanding the network is the
transport layer hop counter. Cisco works around this problem by
incrementing the transport control field only when an IPX packet has
traversed 15 routers, and when the next hop to the destination was learned via
Enhanced IGRP. When a RIP route is being used as the next hop to the
destination, the transport control field is incremented as usual.
Incremental SAP updates—Complete SAP updates are sent periodically on
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each interface until an Enhanced IGRP neighbor is found, and thereafter only
when changes are made to the SAP table. This procedure works by taking
advantage of the Enhanced IGRP reliable transport mechanism, which means
that an Enhanced IGRP peer must be present for incremental SAPs to be sent.
If no peer exists on a particular interface, periodic SAPs will be sent on that
interface until a peer is found. This functionality is automatic on serial
interfaces and can be configured on LAN media.
Chapter 12 Configuring Other Routing Protocols
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