Microsemi PDS-104G - 9 Recovering from Unknown Username, Password; Summarized Username, Password Recovery Procedure (for Experts); Detailed Step-By-Step Username, Password Recovery Procedure

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PDS-104G PoE Switch

Power Over Ethernet PowerView Pro User Guide

Rev. 1.0 CPG – PoE BU

One Enterprise Aliso Viejo, CA 92656 USA

9 Recovering from Unknown Username, Password

The procedure below describes how to recover from a scenario in which the user is unable to access the unit by

Web or Telnet/SSH due to unknown unit username or password.

NOTE:

The recovery procedure can be performed only from the user local LAN (not over the Internet or from

another IP Network). User should be able to turn the unit power off when needed. All PoE ports need to

be disconnected, and the unit must have only a single active Ethernet link.

For security concerns - username, password recovery can be performed only from Unit local LAN using unit

IPv6 Link-Local address as FE80::9C39:DB8b:62DE:7CD4:

 IPv6 Link-Local is limited to local LAN since it is blocked by all routers, meaning that password recovery

can be done only from the local LAN network, and not over the Internet or from remote IP Network.

 No need to configure laptop or unit IPv6 Link-Local address since it is generated automatically (MAC

address-based).

9.1 Summarized Username, Password Recovery Procedure (for Experts)

1. Only one unit Ethernet link may be up, leaving the other Ethernet ports disconnected.

2. No PD device is connected, meaning no power is provided by the unit to PD device.

3. Turn unit power Off. Wait 10 seconds or so to make sure the unit is completely off.

4. Apply back power to the unit. And wait around 30 seconds.

5. The entire procedure described below should be done in less than 120 seconds since power was

applied to the unit.

6. Connect to the unit Link-Local IPv6 address over Telnet over TCP port 2525 (use the help of SysLog

Server in order to find out unit IPv6 Link-Local address). Use passwordrecovery both as username

and password. Trying to access the unit using any other known unit IPv4/IPv6 address will not lead to

recovering the unit from unknown username, password.

7. Upon successful login, the user will be given the option to restore the unit to complete factory default

including all unit Network configuration parameters, or cancel. Selecting the restore option will cause

the unit to restore completely to factory default parameters including all unit Network configuration

parameters.

8. After unit reset, the user can regain control over unit configuration by browsing to IPv4 address

192.168.0.50, using the default username admin, and the default password password.

9.2 Detailed Step-by-Step Username, Password Recovery Procedure

1. Please disconnect from the unit all except for one Ethernet cable (only one Ethernet port should be

active).

2. Run IPv4 capable SysLog Server on your laptop/PC (make sure the firewall is turned off, or enable

UDP port 514 to pass through).

3. Turn the unit off, wait 10 seconds, and turn it back on. A SysLog message similar to the one in

Figure 9-1: Find Unit IPv6 Link-Local address from Power-Up SysLog Report below should appear after

15 seconds or so. Please identify unit IPv6 address (IPv6 Link-Local address always starts with FE80).

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