User guide

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5-7
Compaq Netelligent 2724/2824 Dual-Speed Hub User Guide
Writer:
Chris Seiter
Project:
Compaq Netelligent 2724/2824 Dual-Speed Hub User Guide
Comments:
ile Name:
2824_5.DOC
Last Saved On:
06/25/97 5:32 PM
Generic IP autodiscovery works by looking at the addresses cached by routers
and gateways. These caches are periodically flushed. For a node to remain in
the gateway’s cache, it must transmit at least as often as the cache is flushed.
The 2824 hub implements IP autodiscovery via two MIB objects, each of which
is stored in non-volatile memory.
MIBs Implementing IP Autodiscovery
MIB Object Function
cpqnIpPingPktRate
Sets the rate of ping transmissions so that it can match
the IP gateways cache aging timer, preventing the 2824
hub hub from being deleted from the ARP cache. If you do
not configure a default IP gateway (set through either
SNMP or VT100 management interfaces), the hub does
not transmit the periodic ICMP Pings and cannot
guarantee IP autodiscovery. Default  55 seconds.
cpqnIpAutoDiscoveryStatus
Disables or enables IP autodiscovery.
Default =
discover
(1)
IPX Frame Type
In addition to IP, the 2824 hub also supports an IPX protocol stack. To provide
seamless network management, all Ethernet frames types supported by Novell
must be supported by hubs. The firmware supports the following frame types
for IPX:
■
ETHERNET_II
■
ETHERNET_802.3
■
ETHERNET_802.2
■
ETHERNET_SNAP