Atm/Ethernet Lan Switch Modules (8271) - IBM Nways 8265 Product Description

ATM/Ethernet LAN Switch Modules (8271)

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IBM 8265: Product Description
The 8271 ATM/Ethernet LAN Switch (8271) modules, by using Ethernet MAC
addresses to forward Ethernet frames between ports, can accommodate any type of
LAN segment to provide a high-performance switching solution.
The modules provide direct ATM backplane connectivity allowing segments of
Ethernet LAN users to be interconnected to other Ethernet LAN segments via LAN
switching or high-speed ATM switching.
The modules are offered in two- and three-slot versions (Feature Codes 5212 and
5312), with the following characteristics:
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12 frontal 10BASE-T Ethernet ports with RJ-45 UTP/STP connectors (UTP
cabling Category 3, 4, or 5 is supported)
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Universal Feature Cards (UFCs) can be installed, allowing the attachment of LAN
segments. Up to four UFCs are supported on the three-slot version (two on the
two-slot version). The following UFCs are available, and may be installed in any
combination:
– 4-port 10BASE-T UFC for UTP or STP cabling
– 3-port 10BASE-FL UFC for fiber cabling
– 1-port 100BASE-Tx UFC for UTP or STP cabling
– 1-port 100BASE-Fx UFC for fiber cabling
– 1-port ATM/Ethernet UFC for fiber cabling
– MSS Domain Client UFC. Provides network layer forwarding between LAN
ports and the ATM network.
UFCs working with fiber optic cables allow the connection of LAN segments up to
two kilometers (1.25 miles) from the 8265 using multimode fiber cabling.
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Full compliance with IEEE 802.3 standard
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Variable switching mode:
– Cut-through mode, where the frames are forwarded as soon as the address
has been received
– Store-and-forward mode, where frames are checked before being forwarded
– Adaptive mode, which offers the benefits of both cut-through and
store-and-forward modes.
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Virtual switch capability - which allows a single physical LAN to be divided into two
or eight virtual switches.
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Full duplex support - provides 2 independent paths, each at 10Mbps, per port.
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Etherpipe support - allows multiple ports (up to four) to be connected together
between two 8271 modules.
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MAC addresses - up to 1790 Ethernet MAC addresses per port and 10 000 per
module are supported.
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Transparent bridging and filtering.
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Statistics - the 8271 modules keeps statistics on a per-port, per-station, or entire
module basis.
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Management - either via the service port or from an SNMP management station.
Up to four modules can be used in the 8265 (slots 1, 3, 5, and 7). Slot 7 cannot be
used for a 3-slot module when a CPSW module is installed in slot 9.