Asynchronous Transfer Mode (ATM)
The Tru64 UNIX Asynchronous Transfer Mode subsystem supports the ATM Forum's User-Network Interface (UNI) V3.0
and V3.1 specifications, including the Interim Local Management Interface (ILMI) protocol for registration of up to 32
addresses per interface, UNI signaling for point-to-point connections, and best-effort and CBR VCs for AAL5 PDUs. Also,
per-VC cell pacing (to limit the rate at which an end-system transmits) is supported.
The ATM subsystem supports Classical IP (RFC 1577), including support for multiple IP subnets, per-VC MTU negotiation,
and packetfilter access to data into and out of the host.
LAN Emulation over ATM is supported (Ethernet and IEEE 802.3 frames only), for carrying IP and LAT protocols. Support is
based on the ATM Forum V1.0 specification. Packetfilter access is provided to emulated LAN data into and out of the host.
Tru64 UNIX provides limited support for IP switching over ATM, based on the Ipsilon Networks Inc. reference model (RFC
1953 and 1954). Only one IP switching network device is supported per host, and an ATM adapter used for IP switching
cannot simultaneously support ATM Forum UNI or ILMI protocols.
The ATM subsystem (except IP switching and PVCs) can be configured with the atmsetup utility to start automatically at
boot time.
Tru64 UNIX does not support the UNI V3.0 and V3.1 specifications for full ATM Simple Network Management Protocol
(SNMP) Management Information Bases (MIBs), point-to-multipoint connections, Operations and Maintenance (OAM) flows,
VBR VCs, AAL1, AAL3/4, or raw AAL.
Slow Ethernet
Tru64 UNIX supports Slow Ethernet (10Base).
Fast Ethernet
Tru64 UNIX supports Fast Ethernet (IEEE 802.3 100Base-TX) in full and half duplex.
Gigabit Ethernet
Tru64 UNIX supports Gigabit Ethernet IEEE 802.3z Gigabit Ethernet Standard, IEEE 802.3x Pause Frame Flow control (X-
on/X-off), both symmetric and asymmetric, and is Jumbo frame capable.
Fiber Distributed Data Interface (FDDI)
Tru64 UNIX provides FDDI fiber optic support based on all relevant ANSI and IEEE standards, including SMT revision 7.2.
Token Ring
Tru64 UNIX supports Token Ring (IEEE 802.5) with source routing support for multi-ring networks. Support also includes 4
and 16 MLps over STP and UTP media.
NetRAIN
Tru64 UNIX provides NetRAIN support for Ethernet, Gigabit Ethernet, FDDI, and ATM controllers (LANE only). NetRAIN
allows for failover of communications from one controller to another in the event a fault is detected in the communications
path. A maximum of 10 ports are supported in a NetRAIN set.
QuickSpecs
HP Tru64 UNIX Operating System Version V5.1B
Networking
DA - 11939 U.S. QuickSpecs — Version 1 — 4/8/2004
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