IBM BM 8270 - Manual (Page 2)

Available UFCs include:
• 4-Port Token-Ring Enhanced UTP/STP
• 2-Port Token-Ring Enhanced Fiber
• 1-Port ATM Token-Ring II MMF
• MMS Client MMF
• MSS Client SMF
• MSS Domain Client
Chassis-based for flexibility
Universal Feature Card slots allow you
to build a wide variety of switched
network configurations using the broad
set of optional feature cards that are
shared between both models. This set
of features provides copper and fiber
Token-Ring ports, high-speed uplinks
and Multiprotocol Switched Services
(MSS) Client support. This expands the
capabilities of the 8270 with a sophisti-
cated set of VLAN, filtering and Layer 3
switching functions. Unrestricted by a
fixed-port configuration, the UFCs can be
used in each of the slots of the IBM 8270
to construct a wide variety of switched
networks.
High-speed forwarding
When configured with the appropriate
number of Token-Ring Universal Feature
Cards, the 8270 provides high-speed
forwarding of Token-Ring frames among
shared or dedicated Token-Ring LAN
segments. Similar in function to a
multiport bridge, the 8270 forwards
Token-Ring frames from one port to
another, based on Token-Ring MAC
addresses. The 8270 creates multiple,
parallel paths among the connected
Token-Ring LAN segments and devices.
Supports full-duplex
communication
The 8270 supports full-duplex communi-
cation with LAN stations equipped with
full-duplex Token-Ring adapters. Full-
duplex Token-Ring connections can
provide up to twice the bandwidth (up to
32 Mbps) of standard half-duplex
connections.
1. 2210 Router
2. 8230 Controlled Access Unit
3. 8229 Bridge
4. 8239 Token-Ring Stackable Hub
Figure 1. A typical Token-Ring LAN experiencing congestion
1. 2210 Router
2. 8230 Controlled Access Unit
3. 8229 Bridge
4. 8239 Token-Ring Stackable Hub
5. 8270 Nways Token-Ring LAN Switch Model 600
Figure 2. A Token-Ring switch relieving that congestion