Network Connection - 3Com 3C510510B User Manual

I
NTRODUCTION
SuperStack II Hub TR hubs are intelligent stackable Token Ring hubs that
provide workstation connectivity for 802.5 Token Ring networks.
Available with either 12 or 24 ports, the Hub TR comes equipped with an
additional internetworking lobe port located on the rear panel. All lobe
ports are shielded RJ45 connectors and support either shielded (STP) or
unshielded (UTP) twisted pair media and can operate at either 4 or 16
Mbps ring speed.
SuperStack II Hub TR hubs can be used as single stand-alone hubs or
linked together with other LinkBuilder products to form a stack.
SuperStack II Hub TR hubs have two expansion slots on the back panel
for an optional Network Management Module and/or a Ring In/Ring Out
module.
Optional Network Management modules provide real-time monitoring
and control for SuperStack II Hub TR hubs. Historical data, statistical
analysis, packet capture and traffic information is provided by the
management module via the Transcend Enterprise Manager program
which is based on the Simple Network Management Protocol (SNMP)
and the Remote Monitoring Management Information Base (RMON MIB).
Only one management module is required to manage an entire stack of
up to 20 units.
The Ring In/ Ring Out module provides expansion of the network
beyond the capacity of a local stack, to adjacent wiring closets or to
other 802.5-compliant equipment. This module is available as fiber (2
pair ST), copper (2 RJ45), or as a combination of fiber and copper (1 pair
ST, 1 RJ45). Two modules (1 fiber and 1 copper) are also available for
connecting to ONcore, ONsemble, and ONline equipment.
SuperStack II Hub TR hubs can be part of a stack of up to 20 total units,
accommodating a maximum of up to 256 users in a single managed or
unmanaged ring. Additional units are connected via cascade connectors
on the rear panel and can be a mix of either 12 or 24 port hubs or earlier
SuperStack II Hub TR models including, #3C510500 or #3C510501. The
hubs can be mounted in a free-standing stack of no more than eight
high or in a standard 19-inch rack. Units can be powered either from an
on-board AC power supply or via an optional Redundant Power Supply
(#3C565047) which provides power back-up and connects via a rear
panel port.
H
OW TO
1
7
12 13
Numbered elements in this diagram refer to numbered sections in the text.
These numbers, in bold, are used as references.
U
SE THE
1
18
6 13
12 19 24
15
14
Fault Resilience
SuperStack II Hub TR hubs offer sophisticated fault recovery and fault
prevention for Token Ring networks. To ensure the integrity of the ring,
Zero Delay Lockout (ZDL) has been incorporated into each lobe port of
the unit. ZDL prevents faulty or misconfigured adapters from entering
the ring by testing configuration parameters and verifying ring speed
before the adapter enters the ring. If an adapter is not configured
correctly it is not allowed to enter the ring. The front panel LEDs
indicate when ZDL has isolated a lobe.
Distributed Recovery Intelligence (DRI) is a fault recovery feature that
eliminates adapters if they fail after attaching to the ring and operates
independently of network management. The front panel LEDs indicate
when DRI is in use. Refer to the LED Descriptions for more details.

Network Connection

You can connect any Data Terminal Equipment (DTE) fitted with a 802.5
Token Ring network adapter card to a SuperStack II Hub TR hub.
Connect one end of the shielded or unshielded twisted pair cable to the
RJ45 lobe port on the adapter and the other end to an RJ45 lobe port
on the SuperStack II Hub TR. Refer to the chart below for the maximum
allowable length for the cables.
Media
UTP Category 3
UTP Category 4/5
Type 1
You can connect SuperStack II Hub TR hubs to any internetworking
device such as a bridge, a router, a switch, or Token Ring station using
the Internetworking port, Item 14 on the back panel.
H TR
UB
2
3
LINK STATUS
link OK
green =
= MGMT partition
yellow
auto error partition
blink yellow =
Off inactive
=
Internetworking
1 2 3 4 5 6 13 14 15 16 17 18 Port
7 8 9 10 11 12
19 20 21 22 23 24
17
16 18
Reset
4Mbps
660 ft/ 200 m
1320 ft/ 400 m
2000 ft/ 600 m
4 5 6 8
10
11
7 9
SUPER
BACK
STACK
PANEL
Cascade Phantom
Packet Power
Up Down
RI RO
4
16
RO
RI
Error MGMT
Trunk Rate
19
16Mbps
330 ft/ 100 m
660 ft/ 200 m
1000 ft/ 300 m