Power Over Ethernet Power View Pro User Guide
Copyright
2013
Microsemi
40
Rev.1.0, 17-Dec-13
Analog Mixed Signal Group
1 Enterprise, Aliso Viejo, CA 92656, USA; Phone (USA): (800) 713-4113, (ROW): (949) 221-7100 Fax: (949) 756-0308
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 due to unknown unit username or password.
NOTE:
The recovery procedure can be performed only from the user LAN (not over the Internet). User should be
able to turn the unit power off when needed. All PoE ports need to be disconnected, and the unit should
have only a single active Ethernet link between
user’s local LAN and the unit.
For username, password recovery over the network, only user PC or laptop having IPv6 Link-Local address as
FE80::9C39:DB8b:62DE:7CD4 can be used for the following reasons:
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.
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 Ethernet link may be up, leaving the other Ethernet ports disconnected.
2. Make sure no PD device is connected, meaning no power is provided to any of the PD devices.
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 15 seconds.
5. The entire procedure described below should be done in less than
90
seconds since power was applied
to the unit.
6. Connect to the unit Link-Local IPv6 address over Telnet (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 factory default, or cancel.
Selecting the restore option will cause the unit to restore itself to factory default and reset itself.
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 all except for one Ethernet cable from the unit (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).
