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+ + 4.2 + ISDN Configuration 
  + 4.2.4 + Troubleshooting the ISDN + configuration 
+ + + + + + + +
+ + The following commands are used to debug and troubleshoot the ISDN + configuration: + +
    +
  • The + + debug isdn q921 + + command shows data link layer, or Layer 2, messages on the D channel + between the router and the ISDN switch. Use this command if the + + show + isdn status + command does not show Layer 1 as ACTIVE and Layer 2 as MULTIPLE_FRAME_ESTABLISHED.
    • +
  • + + The + + debug isdn q931 + command shows the exchange of call setup and teardown messages of + the Layer 3 ISDN connection.
    + The     + + debug ppp authentication + command displays the PPP authentication protocol messages, including + Challenge Handshake Authentication Protocol (CHAP) packet exchanges + and Password Authentication Protocol (PAP) exchanges.
    • +
  • + + The + + debug ppp negotiation + command displays information on PPP traffic and exchanges while the + PPP components are negotiated. This includes LCP, + authentication, and NCP exchanges. A + successful PPP negotiation will first open the LCP state, then + authenticate, and finally negotiate NCP.
    • +
  • + + The + + debug ppp error + command displays protocol errors and error statistics associated + with PPP connection negotiation and operation. Use the + + debug ppp + commands to troubleshoot a Layer 2 problem if the + + show isdn status + command does not indicate an ISDN problem.
    • +
+

+ + + + +
+ + + + + +
+ +
+ + + + + +
+ + + + + +
  +

+ + Web Links

+ + +

Troubleshooting ISDN BRI SPIDs

+ + http://www.cisco.com/en/US/tech/ + tk801/tk379/technologies_tech_ note09186a0080093c44.shtml

+ +

+

+
+
+

+       + +        + +

+ + + + + + + + + \ No newline at end of file diff --git a/Bachelor/CCNA4/en_CCNA4_v30/ch4/4_2_4/index.html b/Bachelor/CCNA4/en_CCNA4_v30/ch4/4_2_4/index.html new file mode 100644 index 0000000..82a25be --- /dev/null +++ b/Bachelor/CCNA4/en_CCNA4_v30/ch4/4_2_4/index.html @@ -0,0 +1,29 @@ + + + + +Cisco Global Learning Network + + + + + + + + + + + + + + + + <body> + + <p>This page uses frames, but your browser doesn't support them.</p> + + </body> + + + + diff --git a/Bachelor/CCNA4/en_CCNA4_v30/ch4/4_2_4/media.html b/Bachelor/CCNA4/en_CCNA4_v30/ch4/4_2_4/media.html new file mode 100644 index 0000000..6e67d18 --- /dev/null +++ b/Bachelor/CCNA4/en_CCNA4_v30/ch4/4_2_4/media.html @@ -0,0 +1,21 @@ + + + + + + +Flash Graphic + + + + + + + + + + + + \ No newline at end of file -- cgit v1.2.3