If the terminal that is intended to be accessed cannot be reached even when IP is
known, there are some steps to be performed to check if terminal is able to connect
to the equipment.
o Check if cables connecting terminal and switch are properly
operating. In addition, if possible, check if LEDs corresponding to
the port used by terminal are blinking, showing that
communication is being performed at the port;
o Be sure that terminal is at the same IP subnetwork of switch’s
interface. Check it by inspecting switch’s management interface
mask length and IP address and terminal mask length and IP
address. Bits enabled related to mask length compared to IP
address should be equal from both terminal and management
interface, which means equipment in the same IP network;
o Be sure that port where terminal is connected is at the VLAN of
the management interface. If there is no VLAN configured, be sure
that VLAN of the management interface configured is the default
VLAN (VID = 1);
o Try a PING command from terminal to the switch’s management
interface. If switch responds to PING messages but web interface
is not able to open management interface, be sure that web
browser’s proxy usage is properly configured to permit switch’s
management interface.
Electrical link is not operating properly:
If electrical links are not operating properly, there are two options to be verified:
o Link is operating, but packets are being lost randomly. In this
case, possible cause of the problem is a pair of the UTP cable
broken. It can be verified by VeriPHY function, which will display the
pair broken, or exchanging Ethernet cable. It can be also tested by
changing the port’s speed, as 100 Mbps ports use 2 pairs while 1
Gbps uses 4 pairs of the cable, for instance. Thus, lowering port
speed could give a feedback about cable quality. Besides, this
problem should be solved after the UTP cable is exchanged by a
good quality UTP cable;
o Link is not operating. In this case, possible cause of the problem is
that cable is broken, RJ45 connector is broken or port is disabled. If
port is disabled, enable it at the web interface. To enable ports, go
to the Ports menu, choose port to be enabled and then select
correct port speed. If cable or connector is broken, this problem
should be solved after the UTP cable is exchanged by a good
quality UTP cable.
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