You cannot recover encryption password key, when Cisco WLC configuration is copied from one Cisco WLC
to another (in case of an RMA).
Note
Follow the steps described in the section
Recovering from a Lost or Forgotten Password, on page 278
to recover
from a lost or forgotten password.
Ping
The device supports IP ping, which you can use to test connectivity to remote hosts. Ping sends an echo request
packet to an address and waits for a reply. Ping returns one of these responses:
• Normal response—The normal response (
hostname
is alive) occurs in 1 to 10 seconds, depending on
network traffic.
• Destination does not respond—If the host does not respond, a
no-answer
message is returned.
• Unknown host—If the host does not exist, an
unknown host
message is returned.
• Destination unreachable—If the default gateway cannot reach the specified network, a
destination-unreachable
message is returned.
• Network or host unreachable—If there is no entry in the route table for the host or network, a
network
or host unreachable
message is returned.
Refere the section
to understand how
ping
works.
Layer 2 Traceroute
The Layer 2 traceroute feature allows the switch to identify the physical path that a packet takes from a source
device to a destination device. Layer 2 traceroute supports only unicast source and destination MAC addresses.
Traceroute finds the path by using the MAC address tables of the devices in the path. When the Device detects
a device in the path that does not support Layer 2 traceroute, the Device continues to send Layer 2 trace queries
and lets them time out.
The Device can only identify the path from the source device to the destination device. It cannot identify the
path that a packet takes from source host to the source device or from the destination device to the destination
host.
Layer 2 Traceroute Guidelines
• Cisco Discovery Protocol (CDP) must be enabled on all the devices in the network. For Layer 2 traceroute
to function properly, do not disable CDP.
If any devices in the physical path are transparent to CDP, the switch cannot identify the path through
these devices.
• A device is reachable from another device when you can test connectivity by using the
ping
privileged
EXEC command. All devices in the physical path must be reachable from each other.
• The maximum number of hops identified in the path is ten.
System Management Configuration Guide, Cisco IOS XE Fuji 16.8.x (Catalyst 9500 Switches)
268
Troubleshooting the Software Configuration
Ping
