IBM 8239 Token-Ring Stackable Hub, Setup And User Manual

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Configuration
The 8239 is shipped with a default configuration. If this configuration is acceptable,
you need only power on the 8239 and connect the cables. The configuration
parameters along with their default values are listed in “Configuration Parameters”
on page 4-9.
If you need to change the configuration, you can do so using:
¹
EIA-232 terminal interface (both models)
¹
Telnet terminal interface (Model 1 only)
¹
SNMP (Model 1 only)
¹
BOOTP (Model 1 only)
¹
Configuration setup file loaded via XMODEM (both models) or TFTP (Model 1
only)
Concentrator Functions
Each 8239 provides 16 RJ-45 token-ring ports. Cabling may be either unshielded
twisted pair (UTP) or shielded twisted pair (STP). The 8239 has an expansion slot
that allows you to add 16 additional RJ-45 ports, for a total of 32 ports. Up to eight
8239 can be connected to form a single stack using the stack-in and stack-out
ports. Thus, there can be up to 256 token-ring ports supported in an 8239 stack.
Any combination of 8239 Model 1s and 8239 Model 2s can make up a stack.
The 8239 provides address-to-port mapping information that identifies which MAC
addresses are attached to which ports on the 8239. Fanout devices and MAC-less
devices attached to 8239 ports also are supported by this mapping feature.
The 8239 provides port security. Port security allows you to identify specific MAC
addresses that are permitted to insert at a given port. You can configure a port to
respond to a security intrusion by:
¹
Disabling the port
¹
Reporting the intrusion attempt
¹
Disabling and reporting the intrusion attempt
The 8239 provides automatic beacon recovery when hard-error faults occur.
Hard-error faults are automatically detected and isolated to minimize the impact on
the network.
Device and Network Management
The 8239 can be managed in these ways:
¹
Out-of-band access through the EIA-232 port
¹
In-band access using Telnet, SNMP, PING, and TFTP (8239 Model 1 only)
Device management consists of configuring the stack, obtaining status information
from the stack, and loading code on the stack.
The network management functions supported by the 8239 Model 1 are:
¹
IEEE 802.5 Token Ring MIB
Chapter 1. Introduction and Planning
1-3