Cisco 1760 - VPN Bundle Router, Руководство по установке оборудования

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3-15
Cisco 1760 Modular Access Router Hardware Installation Guide
78-13342-03
Chapter 3 Troubleshooting
Problem-Solving
Fan Behavior
The fans in the Cisco 1760 router are always on. They are not thermostatically
controlled, but they are normally operational.
ISDN S/T
or
ISDN U Card cannot
make a
connection to
the remote
router. Use show isdn status
command to check the
following:
Does the current ISDN
switch type match actual
switch type being used? Use the isdn switch-type command
to configure correct switch type.
Is Layer 1 status
deactivated?
•
Verify that all ISDN cabling is
connected properly.
•
Use the show controller bri0
command to check for the
message
CO RUNNING
LOOPBACK TESTS or CO
TESTING . If you receive either
message, contact your ISP.
If Layer 1 status is active,
does Layer 3 status say “2
Active Layer 3 calls”? Router might have called itself.
Check destination phone number
configured with the
dialer map
command or the dialer string
command.
If Layer 1 status is active,
does Layer 3 status say
“No Active Layer 3
call(s)”? Make sure that the destination phone
number matches the remote router
phone number. Make sure that the
route to the destination matches the
remote router network address.
If Layer 1 status is active,
does Layer 3 status say “1
Active Layer 3 call”? Check the router protocol
configurations.
Table 3-4 Troubleshooting ISDN (continued)
WIC Symptom Check the Following Possible Solutions