Alcatel OmniSwitch 6624 Troubleshooting Manual page 180

Troubleshooting via the CLI
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4/19 default
4/20 default
4/21 default
4/22 default
4/23 default
.....
If the destination VLAN gateway address does respond to a ping, there should be no issue with routing,
and the cause is likely to be with Source Learning assuming all other items check out properly (i.e. PC IP
setup, link status, etc.) (see Chapter 2: Managing Source Learning). If source and destination devices can
both ping their respective default gateways and the gateway address to the other VLAN/subnet, the next
step after verifying that Source Learning is functioning properly would be to take a Sniffer trace to see if
in fact the packets are arriving at the destination machine. (Refer to
page 12-11.)
Check for physical issues via the show interfaces command to see if the switch is dropping packets.
-> show interfaces ethernet 4/2
Slot/Port 4/2
Operational Status
Type
MAC address
BandWidth (Megabits)
Long Accept
Long Frame Size(Bytes) : 1553,
Input :
Bytes Received
Lost Frames
Unicast Frames
Broadcast Frames
Multicast Frames
UnderSize Frames
OverSize Frames
Collision Frames
Error Frames
CRC Error Frames
Alignments Error
Output :
Bytes transmitted :
Lost Frames
Unicast Frames
Broadcast Frames
Multicast Frames
UnderSize Frames
OverSize Frames
Collision Frames
Error Frames
Any error conditions in this display should be corrected prior to proceeding.
If you are attempting to ping a device by name rather than by IP address, verify that the name server
configuration is correct, and that the DNS servers in question are functioning, and that the addresses it
returns are correct for the device you are trying to ping.
-> show dns
Resolver is : disabled
page 12-4
inactive
inactive
inactive
forwarding
inactive
:
: down,
: Fast Ethernet,
: 00:d0:95:6b:53:95,
: 100,
: Enable,
:
:
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:
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"Troubleshooting with Debug CLI" on
Duplex
Runt Accept
Runt Size(Bytes) : 64
14397,
0,
6,
93,
7,
0,
0,
0,
0,
0,
0
83244,
0,
10,
84,
1106,
0,
0,
0,
0
OmniSwitch Troubleshooting Guide
Troubleshooting IP Routing
: -,
: Disable,
September 2005