The SM-2508 Gigabit Link Protector provides a fully
managed automatic link backup capability to eight "mission-critical"
10BaseT/100BaseTX/1000BaseT Ethernet links. The system protects vital
connections to servers, routers, firewalls, and other key Ethernet devices
that require fail-safe link operation. The SM-2508 operates by
non-intrusively monitoring a "primary" link and, in the event of a failure,
automatically switches to the backup link; or switching can be controlled
externally via SNMP, RS232, Telnet, or front panel commands. The Link
Protector does not require any additional network cards in a server; is
completely transparent in normal operation; and does not affect IEEE 10BaseT
repeater budget. The SM-2508 is designed to be mounted in a standard 19"
datacom/telecom rack or tabletop.
Key Benefits
Automatic or SNMP-based Switching Capability Between Primary and
Backup Links
Completely Transparent to Link Traffic
Maintains Connection Between Protected and Primary Port thru Power
Failure
Allows Gigabit Primary Links and Less Expensive 100BaseTX or 10BaseT
Backups to Coexist
48VDC and/or 110/220VAC Redundant Power
PRODUCT DESCRIPTION
The SM-2508 Gigabit Link Protector provides a fully managed automatic
link backup capability to eight "mission-critical"
10BaseT/100BaseTX/1000BaseT Ethernet links. The system protects vital
connections to servers, routers, firewalls, and other key Ethernet devices
that require fail-safe link operation. The SM-2508 operates by
non-intrusively monitoring a "primary" link and, in the event of a failure,
automatically switches to the backup link; or switching can be controlled
externally via SNMP, RS232, Telnet, or front panel commands. The Link
Protector does not require any additional network cards in a server; is
completely transparent in normal operation; and does not affect IEEE
repeater budget calculations. The SM-2508 is designed to be mounted in a
standard 19" datacom/telecom rack or tabletop.
APPLICATIONS
Provide Automatic Backup for Critical 10BaseT/100BaseTX/1000BaseT
Links to Servers, Routers, and other Vital Equipment
Protect Attached Equipment From Failures of Primary Link Due to Cable
Cuts, Disconnected Cables, and Hub Failures (Malfunctioning Ports, Plug-in
Cards, or Power Supplies)
Provide Immediate Notification via SNMP of Link Failures
Control Network Configuration/Topology via SNMP Scripts
Simplify Network Maintenance Thru Forced Switching to Hot Standby
SYSTEM FEATURES
Provides and Manages Redundant Connections for 8
10BaseT/100BaseTX/1000BaseT Ports
Backup Ports Can Be Inexpensive 100BaseTX or 100BaseT Ports
Automatic Switching to Backup on Loss of Service
Automatic Switch-Back to Primary Link on Restoration of Service
Alarm on Loss of Primary Backup Link and/or Server Links
Telnet Access to Control, Status, and Setup Information
BOOTP Automatic Network Address Recovery
"Ping"-able using ICMP
Simple Network Management Protocol(SNMP)
SNMP Trap Message on Alarm for Link Failure Notification
SNMP MIB II Compliant (RFCs 1155, 1157, 1213)
Port Switching Capabilities include Individual Port, Group, and Gang
Modes
Forced Switchover to Backup, Port Enable/Disable, and Alarm
Acknowledgement Functions Available Through SNMP, RS232, Telnet and Front
Panel Switches
LED Indicators for Transmit, Receive, and Link Status for 10BaseT
Management Port
System Configuration and Firmware Stored in Non-Volatile Upgradeable
EEPROM
110/220V Auto Sensing Redundant Power Supplies (-48VDC Redundant
Optional)
RS-232 Console Interface (300 to 38.4K bps) for System Configuration
Programmable Password Protection
Online Help
PORT FEATURES
Auto Switch to Backup on Loss of Service
Auto Switch to Primary on Restoration of Service
Alarm Notification Via SNMP Traps
Default Connection to Primary Link on Loss of Power
Enable/Disable of Automatic Switching
Capability to Force Port to Backup Condition
Front Panel Display of Link Status on Primary, Backup, and Server
Connections; Alarm Status; Active Connection Status (Primary or Backup);
Port Enable/Disable Status; Override Status
Connectors: 3 RJ45 Twisted Pair Per Port for each of 3 Ports, 1 RJ45
Management Port, 1 or 2 3-Wire 110V(.25A)/220V(.5A) Autosensing AC Power
or Optional 1 or 2 -48VDC(.5A) 2-Pin Screw Terminal Power
