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Installing and Configuring Cisco 802 IDSL and Cisco 804 IDSL Routers
78-10368-03
Troubleshooting Using Debug Commands
Output 1 Example (show isdn status)The current ISDN Switchtype = basic-ni1
ISDN BRI0 interface
Layer 1 Status:
DEACTIVATED
Layer 2 Status:
Layer 2 NOT Activated
Layer 3 Status:
No Active Layer 3 Call(s)
Activated dsl 0 CCBs = 0
Total Allocated ISDN CCBs = 0
isdn#
ISDN BR0:TX -> RRp sapi = 0 tei = 80 nr = 1
ISDN BR0:RX <- RRf sapi = 0 tei = 80 nr = 1
isdn#
ISDN BR0:TX -> RRp sapi = 0 tei = 81 nr = 1
ISDN BR0:RX <- RRf sapi = 0 tei = 81 nr = 1
ISDN BR0:TX -> RRp sapi = 0 tei = 80 nr = 1
ISDN BR0:RX <- RRf sapi = 0 tei = 80 nr = 1
isdn#und all
isdn#show isdn st
The current ISDN Switchtype = basic-dms100
ISDN BRI0 interface
Layer 1 Status:
ACTIVE
Layer 2 Status:
TEI = 80, State = MULTIPLE_FRAME_ESTABLISHED
TEI = 81, State = MULTIPLE_FRAME_ESTABLISHED
Layer 3 Status:
Command Possible Problem Solution
show isdn status
(user EXEC mode).
See output 1 example
following this table.
• Improperly connected cable. • Refer to troubleshooting information in Cisco 800
Series Routers Hardware Installation Guide.
• Damaged IDSL cable. • Order a new red IDSL cable from your Cisco
reseller.
• Problem with IDSL line. • Contact your telephone service provider to report
a problem.
If the problem continues after these steps, call your
Cisco reseller.
• Software configuration error for
router connected to Cisco 802
IDSL or Cisco 804 IDSL router.
• Check your router configuration. See the
documentation that shipped with your router for
more information.
debug ppp negotiation,
debug ppp
authentication
(privileged EXEC mode)
See output 2 example
following this table.
• PAP or CHAP authentication
failed.
• For PAP, check the settings of the PAP hostname
and password for correct spelling and use of
uppercase and lowercase letters. If settings are
incorrect, reconfigure them.
• For CHAP, clear the existing hostname and
password. Reconfigure the hostname and
password.