Cabletron Systems 2H253-25R manual Using the Reset Button

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Using the RESET Button

4.3USING THE RESET BUTTON

The RESET button shown in Figure 4-2resets and re-initializes the 2H253-25R.

Pressing the RESET button resets the device, and all current switching being performed

!by the device is halted. A network downtime of up to two minutes will result from this

CAUTION action.

FAST ETHERNET WORKGROUP SWITCH

	LED	2	4	6	8	10	12
	MODE	1	3	5	7	9	11
	RX-TX	1	3	5	7	9	11
	RX-TX
	DPX-SPD

	PWR
RESET	CPU
2H253-25R	COM

RESET Button

14 16 18 20 22 24

13 15 17 19 21 23

2762-10

Figure 4-2 RESET Button

To reset the 2H253-25R processor, press and release the RESET button. The 2H253-25R goes through a reset process for approximately 60 seconds. Additional downtime may result as the device reenters the network.

NOTE

It is not recommended to press the RESET button while the device is already in reset mode. If so, the device will enter an extended diagnostic procedure, which is unnecessary for normal operation. This extended diagnostic procedure takes much longer than a minute.

4-8Troubleshooting

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Contents 2H253-25R SmartSwitch Installation User’s Guide Page Page FCC Notice Cabletron SYSTEMS, INC Program License Agreement Page Page Page Cabletron Systems Limited Program License Agreement Viii Declaration of Conformity Page Contents Troubleshooting Figures Tables Using this Guide About This GuideStructure of this Guide Related Documents XviDocument Conventions Document ConventionsPage Introduction OverviewConnectivity Auto-NegotiationFull Duplex Switched Ethernet Runtime IP Address DiscoverySmartTrunk Remote Monitoring Rmon Broadcast SuppressionPort/VLAN Redirect Functions Rate Limiting Flow ControlGarp Switch Operation Switching Options12 802.1 Port Priority ManagementLanview Diagnostic LEDs Optional HSIMs and VHSIMsStandards Compatibility Year 2000 CompliantGetting Help Network Requirements 10BASE-T Network100BASE-TX Network Installation Unpacking the DeviceInstalling Options Installing the DeviceTabletop or Shelf Installation Guidelines for Tabletop and Shelf InstallationsRackmount Installation Guidelines for the Rackmount InstallationAttaching the Strain-Relief Bracket Rack Mounting the 2H253-25R Connecting Power Redundant Primary AC outlets are On separate circuitsConnecting to the Network Straight Cable Connection Completing the Installation Troubleshooting Using LanviewPWR CPU FDX Troubleshooting Checklist OFFSeries 2E253, 2H252, 2H253, User parameters Position of Mode switch IP address Using the Reset Button Reset ButtonDevice Specifications SpeciﬁcationsPhysical Properties Electrical Specifications Environmental RequirementsINPUT/OUTPUT Ports COM Port Pinout Assignments Regulatory CompliancePage Optional Installations Mode Switch Bank Settings Required ToolsRemoving the Chassis Cover Removing the Chassis Cover Figure B-1 Removing the Chassis Cover Setting the Mode Switches Switch 6 Forced BootPSimm Upgrade Installing the Dram Simm Locating SIMMsFigure B-4 Installing the Dram Installing Optional Hsim or Vhsim Interface Modules Figure B-5 Hsim and Vhsim Connector LocationsPage Index NumericsIndex-2