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
