Installation and Reference Guide (J3210A, J3212A, J3200A, J3202A, J3204A) 1996-08

5-5
Troubleshooting
Diagnostic Tests
Troubleshooting
Testing the Hub’s Ports and the Links
To test the hub’s ports and the attached network links, first check for link beat
detection. Use these tests if you have link beat detected for a port (Port LED
is on or is active in the ASCII console). Then look up the segment that the port
resides on in the Port/Segment Configuration in the ASCII console. Then
choose one of the following ways to run a test between the hub and an
addressable device connected at the remote end of each of the cables you wish
to test:
■ Select Link Test from HP AdvanceStack Assistant’s Network Test
function or the ASCII console’s Connectivity Tests. This causes the
hub to send IEEE 802.2 Test command packets to a specified network
device out a specified segment. The device must be able to send an
IEEE 802.2 Test response packet upon receipt of a Test command
packet. Usually this would be another network device such as a hub,
switch or router. You specify the remote device by its 12-digit hexa-
decimal MAC address.
■ Select Ping Test. This is a network layer test that you can run on TCP/
IP networks. The hub sends ICMP Echo Request packets to a specified
network device. This works with devices that have an IP address and
are able to respond to an ICMP Echo Request packet. Most end nodes
using IP will respond to this packet. You specify the remote device by
its IP address.
■ Select IPX Test. This is a network layer test that you can run on
Novell NetWare IPX networks. The hub sends IPX test packets to a
specified network device. This works with devices that have an IPX
address and are able to respond to an IPX test packet. Most end nodes
using IPX will respond to this packet. You specify the remote device
by its IPX address.
If the test passes, the hub's port, the network link, and the remote device are
all working properly. If you are testing the AUI port, this also tests the
transceiver that is attached to the port.
If the test fails, you can test the hub using the “Testing the Hub Only”
procedures on the previous page. You should also verify that the remote device
is powered on and functioning properly, and that the cable is good, and that
the device is not connected to a segment which you have isolated from the
backplane.
If the hub passes its tests, but the network test (link test, Ping test, or IPX test)
fails, the problem is in the cabling, the remote device, or possibly the output
circuitry of the hub's port.
See the HP AdvanceStack Assistant online help for more information on how