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Troubleshooting via the CLI Troubleshooting IP Routing
page 12-4 OmniSwitch Troubleshooting Guide September 2005
.....
4/19 default inactive
4/20 default inactive
4/21 default inactive
4/22 default forwarding
4/23 default inactive
.....
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 “Troubleshooting with Debug CLI” on
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 : down,
Type : Fast Ethernet,
MAC address : 00:d0:95:6b:53:95,
BandWidth (Megabits) : 100, Duplex : -,
Long Accept : Enable, Runt Accept : Disable,
Long Frame Size(Bytes) : 1553, Runt Size(Bytes) : 64
Input :
Bytes Received : 14397,
Lost Frames : 0,
Unicast Frames : 6,
Broadcast Frames : 93,
Multicast Frames : 7,
UnderSize Frames : 0,
OverSize Frames : 0,
Collision Frames : 0,
Error Frames : 0,
CRC Error Frames : 0,
Alignments Error : 0
Output :
Bytes transmitted : 83244,
Lost Frames : 0,
Unicast Frames : 10,
Broadcast Frames : 84,
Multicast Frames : 1106,
UnderSize Frames : 0,
OverSize Frames : 0,
Collision Frames : 0,
Error Frames : 0
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