Nortel BayStack 425-48T 48-Port Managed Desktop Switch AL20112A44 216488-A. Nortel Networks BayStack 425 Switches have been designed to address the needs of small and medium customers. The switches help save money by allowing devices to be connected at either 10 Mbps or 100 Mbps without needing newer switches to accommodate different speeds. In addition, the switches are scalable and provide small and medium businesses (SMBs) with the comfort of knowing that their investment is protected as their company grows. Easy Web-based management features and plug-and-play stacking ports will save customers significant time in setting up the switches.
Model Name: BayStack 425-48T
Model Number: AL20112A44
Nortel Part Number: 216488-A
Specifications:
| Physical specifications | Height: 4.37 cm (1.72 in)
Width: 43.82 cm (17.25 in)
Depth: 22.91 cm (9.02 in) |
| Performance | Switch fabric bandwidth—16 Gbps
Frame forwarding rate—
BayStack 425-48T 10.1 million packets per second (Mpps)
Switched 10 Mbps forwarding rate—14,880 pps maximum
Switched 100 Mbps forwarding rate—148,810 pps maximum
Switched 1000 Mbps forwarding rate—1,488,810 pps maximum
Memory—32MB memory architecture shared by all ports
4MB Flash Memory
16MB SDRAM
Address database size—8,000 entries at line rate
Addressing—48-bit MAC address
Frame length—64 to 1518 bytes (IEEE 802.1Q Untagged)
68 to 1522 bytes (IEEE 802.1Q Tagged) |
| Interface options | 10BASE-T/100BASE-TX
RJ-45 (8-pin modular) connectors for Auto MDI/MDI-X
interface with auto-polarity
The BayStack 425 Switches support the following SFP GBICs: 1000BASE-SX
Uses short wavelength 850 nm MTRJ or LC type fiber optic
connectors to connect devices over multimode (275m, 62.5um core or 550m, 50.0um core) fiber optic cable. 1000BASE-LX
Uses long wavelength 1300nm duplex LC type fiber optic connector to connect devices over single mode (10km, 9um core) fiber optic cable. |
| Network protocol and standards compatibility | IEEE 802.3 10BASE-T (ISO/IEC 8802-3, Clause 14)
IEEE 802.3u 100BASE-TX (ISO/IEC 8802-3, Clause 25)
IEEE 802.3u Autonegotiation on Twisted Pair (ISO/IEC 8802-3, Clause 28)
IEEE 802.3x (Flow Control on the Gigabit Uplink ports)
IEEE 802.3z Gigabit
IEEE 802.1d MAC Bridges (ISO/IEC 10038)
IEEE 802.1p (Prioritizing)
IEEE 802.1Q (VLAN Tagging)
IEEE 802.1D (Spanning Tree Protocol)
IEEE 802.3ad (manual/static)
IEEE 802.3ad (LACP)†
IEEE 802.1s†
IEEE 802.1w† |
| RFC support | RFC 1213 (MIB-II); RFC 1493 (Bridge MIB); RFC 2863 (Interfaces Group MIB);
RFC 2665 (Ethernet MIB); RFC 2737 (Entity MIBv2); RFC 2819 (RMON MIB);
RFC 1757 (RMON); RFC 1271 (RMON); RFC 1157 (SNMP); RFC 2570
(SNMPv3);
RFC 2571 (SNMP Frameworks); RFC 2573 (SNMPv3 Applications);
RFC 2574 (SNMPv3 USM); RFC 2575 (SNMPv3 VACM); RFC 2576 (SNMPv3);
RFC 2572 (SNMP Message Processing; RFC 791 (IP); RFC 792 (ICMP); RFC 793 (TCP); RFC 783 (TFTP); RFC 826 (ARP); RFC 768(UDP); RFC 854 (TELNET); RFC951 (Bootp); RFC 2236 (IGMPv2); RFC 1112 (IGMPv1); RFC 1945 (HTTP v1.0); RFC 2138 (RADIUS); RFC 894 (IP over Ethernet); RFC 2674 (Q MIB) |
| Environmental | Operating temperature: 0° to 40°C (32° to 104°F)
Storage temperature: -25° to 70°C (-13° to 158°F)
Operating humidity: 10 to 85% maximum relative humidity, noncondensing
Storage humidity: 10 to 95% maximum relative humidity,noncondensing
Operating altitude: Up to 3,024 m (10,000 ft.) above sea level
Storage altitude: Up to 3,024 m (10,000 ft.) above sea level |
Features and Benefits:
- Full autosensing on every port Every UTP port on the BayStack 425 Switches is equipped with autosensing technology to automatically detect and support the speed and mode of a connected device. The ports determine whether a connected device is operating at 10 Mbps or 100 Mbps, and automatically adjust to the optimal speed. Each of the switched ports can also automatically detect and support full-duplex connections to servers, power-user end stations or other switches, as well as half-duplex connections to legacy NICs or hubs.
- High-density stacking architecture The plug-and-play cascade stacking architecture permits connection of up to 8 BayStack 425 Switches with stack cables into a single manageable unit of up to 192 10/100 Mbps ports. With the BayStack 425-48T Switch, up to 384 10/100 Mbps ports can be achieved in a stack of eight units. Two built-in Gigabit stacking ports in the rear of the switch provide easy connections to other members of the stack; there is no need to purchase a cascade module or use an uplink port for stacking.
- Flexible high-speed uplink ports The BayStack 425 Switches offer two built-in combo uplink ports (ports 25 and 26 of BayStack 425-24T and ports 49 and 50 of the BayStack 425-48T) in the front of the unit that provide high-speed connection to backbone switches or servers.
- BoSS (BayStack operating system Switching Software) BoSS for BayStack 425 Switches is a single software image that is used for BayStack 425-24T, BayStack 420-24T, and BayStack 425-48T switches. Future versions provide new features nd will be available for free for the lifetime of the switches.
- Multi-Link Trunking. Multi-Link Trunking (MLT) enables grouping of links between a BayStack 425 Switch and another switch or a server to provide greater bandwidth with active redundant links. Nortel Networks unique Distributed Multi-Link Trunking (DMLT) feature allows trunked ports to span multiple units of the stack for redundant connectivity to mission-critical servers and the network center.
