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5-8
Managing the Hub
Writer:
Chris Seiter
Project:
Compaq Netelligent 2724/2824 Dual-Speed Hub User Guide
Comments:
File Name:
2824_5.DOC
Last Saved On:
06/25/97 5:32 PM
IMPORTANT:
Since Novell uses ETHERNET_802.2 as the default frame type for
IPX, the default IPX frame type of the hub is also ETHERNET_802.2.
Most IPX communications uses IPX packets that are initiated by a requestor,
not the hub. A management station sends these packets to the hub and waits for
a response. The hub receives the packet and sends it back using the same frame
type and IPX network number used to send the packet. For response traffic,
therefore, the hub supports all IPX frame types.
In addition, the hub originates some types of IPX traffic, such as packets for
SNMP traps and RIP and SAP broadcasts. Consequently, to transmit the packet,
the hub must know the IPX frame type and network number. This requires the
use of MIB variables, one of which is the IPX frame type variable.
To determine which IPX frame type it will implement, the hub uses the
following priority scheme:
■
Uses the value stored in NVRAM
■
If no value is stored in NVRAM, uses the default value of
ETHERNET_802.2
You can change the frame type at any time by setting the IPX frame type MIB
variable through the VT100 interface, SNMP, or Compaq Netelligent
Management Software.
The IPX network numbers for SNMP traps are determined through the MIB
variables indicating the IPX trap receiver addresses. IPX network numbers for
RIP and SAP broadcasts are learned by analyzing the RIP broadcasts sent from
IPX routers on the network. If the network number cannot be learned through
the network traffic, the default network number 0 is used.