3-23
Cisco Router and Security Device Manager Version 2.2 User’s Guide
OL-4015-08
Chapter3 Create Connection Wizards
Connectivity testing and troubleshooting
3. Checks for DHCP and IPCP configurations on the interface.
4. Exits interface test.
5. Pings the destination.
SDM reports the results of each of these checks in the Activity/Status columns. If
the ping succeeds, then the connection will be reported as successful. Otherwise
the connection is reported down, and the test that failed is noted.
How does SDM Troubleshoot?
When SDM troubleshoots a connection, it performs a more extensive check than
the basic ping test. If the router fails a test, SDM performs additional checks so it
can provide you with the possible reasons for failure. For example, if Layer 2
status is down, SDM attempts to determine the reason(s), reports them, and
recommends actions you can take to rectify the problem. SDM performs the
following tasks:
1. Checks interface status. If the Layer 2 protocol is up, SDM goes to step 2.
If Layer 2 protocol status is down, SDM checks ATM PVC status for XDSL
connections, or PPPoE status for encapsulated Ethernet connections.
–
If the ATM PVC test fails, SDM displays possible reasons for the failure
and actions you can take to correct the problem.
–
If the PPPoE connection is down, there is a cabling problem, and SDM
displays appropriate reasons and actions.
After performing these checks, the test is terminated and SDM reports the
results and suggests actions.
2. Checks DNS Settings, whether they be SDM default options or user-specified
hostnames.
3. Checks DHCP or IPCP configuration and status. If the router has an IP
address through either DHCP or IPCP SDM goes to step 4.
If the router is configured for DHCP or IPCP but has not received an IP
address through either of these methods, SDM performs the checks in step a
above. The test terminates and SDM reports the results and suggests actions.
4. Pings the destination. If the ping succeeds, SDM reports success.
If the ping fails on an xDSL connection with PPPoE encapsulation, SDM checks:
•the ATM PVC status