Async Multilink PPP Troubleshooting Diagnostic Output

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Updated:September 14, 2000

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Async Multilink PPP Troubleshooting Diagnostic Output

Table Of Contents

Async Multilink PPP Troubleshooting Diagnostic Output

Cisco IOS show isdn status Command Output

Cisco IOS debug isdn q931 Command Output

Cisco IOS show modem summary Command Output

Cisco IOS debug ppp authentication Command Output

Cisco IOS show ppp multilink Command Output

Cisco IOS debug ppp negotiation Command Output

Cisco IOS show processes cpu Command Output

Cisco IOS show ip route Command Output


Async Multilink PPP Troubleshooting Diagnostic Output

The diagnostic output provided in this chapter present examples illustrating the process of diagnosing problems addressed in "Async MPPP Troubleshooting Tables." Diagnostic output provided here includes the following:

•Cisco IOS show isdn status Command Output

•Cisco IOS debug isdn q931 Command Output

•Cisco IOS show modem summary Command Output

•Cisco IOS debug ppp authentication Command Output

•Cisco IOS show ppp multilink Command Output

•Cisco IOS debug ppp negotiation Command Output

•Cisco IOS show processes cpu Command Output

•Cisco IOS show ip route Command Output

You can use the Output Interpreter tool to analyze the output from some of the commands listed in this chapter. The Output Interpreter is available from the following page Cisco Connection Online:

•http://www.cisco.com/support/OutputInterpreter/

Refer to the Output Interpreter for a list of the commands it accepts.

3.1 Cisco IOS show isdn status Command Output

In the following example, the ISDN status messages are as expected: Layer 1 status is ACTIVE; Layer 2 status is in State=MULTIPLE_FRAME_ESTABLISHED.

Note Layer 1 must be in ACTIVE state and Layer 2 must be in STATE=MULTIPLE_FRAME_ESTABLISHED for a connection to be successfully completed.

NAS#show isdn status 

Global ISDN Switchtype = primary-5ess

ISDN Serial0:23 interface

        dsl 0, interface ISDN Switchtype = primary-5ess

    Layer 1 Status:

        ACTIVE

    Layer 2 Status:

        TEI = 0, Ces = 1, SAPI = 0, State = MULTIPLE_FRAME_ESTABLISHED

    Layer 3 Status:

        0 Active Layer 3 Call(s)

    Activated dsl 0 CCBs = 0

    The Free Channel Mask:  0x807FFFFF

Refer to Table 2-2 for related symptom, problem, and diagnostic notes.

The following is the output interpreter result for the above output indicating that the connection is behaving properly. 

========================================

SHOW ISDN STATUS NOTIFICATIONS (if any):

========================================


Layers 1 and 2 (Q.921) of the ISDN interfaces are operating normally.

Note Access the Output Interpreter from this location: http://www.cisco.com/support/OutputInterpreter/

3.2 Cisco IOS debug isdn q931 Command Output

In the following example output, the NAS receives a call setup message from the switch. (If the NAS does not receive a setup message verify that the PRI is functioning correctly.) The NAS then transmits a call processing message. The last line of this output shows that the call is successfully connected. 

NAS#debug isdn q931

ISDN Q931 packets debugging is on

NAS#

Aug 31 19:12:25.890 UTC: ISDN Se0:23: RX <-  SETUP pd = 8  callref = 0x015D

Aug 31 19:12:25.890 UTC:         Bearer Capability i = 0x9090A2

Aug 31 19:12:25.890 UTC:         Channel ID i = 0xA98381

Aug 31 19:12:25.890 UTC:         Called Party Number i = 0xC1, '3241937'

Aug 31 19:12:25.894 UTC: ISDN Se0:23: TX ->  CALL_PROC pd = 8  callref = 0x815D

Aug 31 19:12:25.894 UTC:         Channel ID i = 0xA98381

Aug 31 19:12:25.894 UTC: ISDN Se0:23: TX ->  ALERTING pd = 8  callref = 0x815D

Aug 31 19:12:25.998 UTC: ISDN Se0:23: TX ->  CONNECT pd = 8  callref = 0x815D

Aug 31 19:12:26.030 UTC: ISDN Se0:23: RX <-  CONNECT_ACK pd = 8  callref = 0x015D

Aug 31 19:12:26.030 UTC: ISDN Se0:23: CALL_PROGRESS: CALL_CONNECTED call id 0x190, 
bchan -1, dsl 0

Refer to Table 2-2 for related symptom, problem, and diagnostic notes.

3.3 Cisco IOS show modem summary Command Output

In the following example command output, 48 available incoming modems and 48 available outgoing modems are detected. 

NAS#show modem summary

Avg Hold     Incoming calls       Outgoing calls     Busied   Failed   No   Succ

  Time     Succ   Fail  Avail   Succ   Fail  Avail   Out      Dial     Ans  Pct.

00:00:24      1      0     48      0      0     48       0        0     0  100%

Refer to Table 2-2 for related symptom, problem, and diagnostic notes.

3.4 Cisco IOS debug ppp authentication Command Output

In the following example command output, the first and second connections are authencticated, but the third connection fails authentication. 

NAS#debug ppp authentication 

PPP authentication debugging is on

NAS#

Sep  1 13:11:27.683 UTC: As47 PPP: Treating connection as a callin

Sep  1 13:11:31.843 UTC: As47 CHAP: O CHALLENGE id 5 len 36 from "NAS"

Sep  1 13:11:32.019 UTC: As47 CHAP: I RESPONSE id 5 len 37 from "clearlake-lan-01"

Sep  1 13:11:32.019 UTC: As47 CHAP: O SUCCESS id 5 len 4

Sep  1 13:11:32.123 UTC: Vi3 PPP: Treating connection as a dedicated line

Sep  1 13:12:43.957 UTC: As35 PPP: Treating connection as a callin

Sep  1 13:12:48.041 UTC: As35 CHAP: O CHALLENGE id 5 len 36 from "NAS"

Sep  1 13:12:48.277 UTC: As35 CHAP: I RESPONSE id 5 len 37 from "clearlake-lan-01"

Sep  1 13:12:48.281 UTC: As35 CHAP: O SUCCESS id 5 len 4

NAS#

NAS#

Sep  1 13:16:36.802 UTC: As19 PPP: Treating connection as a callin

Sep  1 13:16:40.834 UTC: As19 CHAP: O CHALLENGE id 4 len 36 from "NAS"

Sep  1 13:16:41.026 UTC: As19 CHAP: I RESPONSE id 4 len 37 from "clearlake-lan-01"

Sep  1 13:16:41.026 UTC: As19 CHAP: Unable to validate Response.  Username 
clearlake-lan-01: Authentication failure

Sep  1 13:16:41.026 UTC: As19 CHAP: O FAILURE id 4 len 26 msg is "Authentication 
failure"

NAS#

NAS#

Refer to Table 2-2 for related symptom, problem, and diagnostic notes.

3.5 Cisco IOS show ppp multilink Command Output

The following show ppp multilink Cisco IOS command output illustrates a situation where a bundle was created using both username and endpoint discriminator and where the bundle has two member links. 

NAS#show ppp multilink 


Virtual-Access1, bundle name is clearlake-lan-01/b07502c88ec4420014be1fc1553700000

  0 lost fragments, 0 reordered, 0 unassigned, sequence 0x23/0x8 rcvd/sent

  0 discarded, 0 lost received, 1/255 load

  Member links: 2 (max not set, min not set)

    Async48

    Async46

Refer to Table 2-3,Table 2-4 and Table 2-8 for related symptom, problem, and diagnostic notes.

3.6 Cisco IOS debug ppp negotiation Command Output

The following output from debug ppp negotiation and debug ppp multilink events Cisco IOS commands combine to illustrates a situation in which a bundle was created using both username and endpoint discriminator and that the bundle has two member links.

Note If either end of the link does not support multilink (or is not properly configured for multilink), the debug ppp negotiation Cisco IOS command output will show a CONFREJ (a REJect) for MRRU and EndPoint Discriminator. If you see such an error output, ensure that your configuration is correct.

The debug command output example that follows illustrates the following events:

1. The MRRU is CONFACKed (agreed upon by both sides) for a connection.

2. The connection is virtualized.

3. A bundle is created (first link joins bundle).

4. A second connection attempted is detected.

5. The MRRU for the second connection is agreed upon by both sides.

6. The second connection is virtualized.

7. The second connection is added to multilink bundle 

NAS#debug ppp negotiation

PPP protocol negotiation debugging is on

NAS#debug ppp multilink events 

Multilink events debugging is on

NAS#

NAS#

NAS#show debug

PPP:

  PPP protocol negotiation debugging is on

  Multilink events debugging is on

NAS#

NAS#terminal monitor

NAS#

Sep  1 13:52:39.298 UTC: As2 IPCP: Install route to 172.21.104.25

Sep  1 13:52:41.299 UTC: As2 PPP: Treating connection as a callin

Sep  1 13:52:41.299 UTC: As2 PPP: Phase is ESTABLISHING, Passive Open

Sep  1 13:52:41.299 UTC: As2 LCP: State is Listen

Sep  1 13:52:42.287 UTC: As2 LCP: I CONFREQ [Listen] id 3 len 46

Sep  1 13:52:42.287 UTC: As2 LCP:    ACCM 0x000A0000 (0x0206000A0000)

Sep  1 13:52:42.287 UTC: As2 LCP:    MagicNumber 0x0042C48F (0x05060042C48F)

Sep  1 13:52:42.287 UTC: As2 LCP:    PFC (0x0702)

Sep  1 13:52:42.287 UTC: As2 LCP:    ACFC (0x0802)

Sep  1 13:52:42.287 UTC: As2 LCP:    Callback 6  (0x0D0306)

Sep  1 13:52:42.287 UTC: As2 LCP:    MRRU 1500 (0x110405DC)

Sep  1 13:52:42.287 UTC: As2 LCP:    EndpointDisc 1 Local

Sep  1 13:52:42.287 UTC: As2 LCP:     (0x131301B07502C88EC4420014BE1FC155)

Sep  1 13:52:42.287 UTC: As2 LCP:     (0x370000)

Sep  1 13:52:42.287 UTC: As2 LCP: O CONFREQ [Listen] id 12 len 47

Sep  1 13:52:42.291 UTC: As2 LCP:    ACCM 0x000A0000 (0x0206000A0000)

Sep  1 13:52:42.291 UTC: As2 LCP:    AuthProto CHAP (0x0305C22305)

Sep  1 13:52:42.291 UTC: As2 LCP:    MagicNumber 0xA53BCC27 (0x0506A53BCC27)

Sep  1 13:52:42.291 UTC: As2 LCP:    PFC (0x0702)

Sep  1 13:52:42.291 UTC: As2 LCP:    ACFC (0x0802)

Sep  1 13:52:42.291 UTC: As2 LCP:    MRRU 1524 (0x110405F4)

Sep  1 13:52:42.291 UTC: As2 LCP:    EndpointDisc 1 Local

Sep  1 13:52:42.291 UTC: As2 LCP:     (0x131201626F62736C616B652D6E61732D)

Sep  1 13:52:42.291 UTC: As2 LCP:     (0x3031)

Sep  1 13:52:42.291 UTC: As2 LCP: O CONFREJ [Listen] id 3 len 7

Sep  1 13:52:42.291 UTC: As2 LCP:    Callback 6  (0x0D0306)

Sep  1 13:52:44.287 UTC: As2 LCP: TIMEout: State REQsent

Sep  1 13:52:44.287 UTC: As2 LCP: O CONFREQ [REQsent] id 13 len 47

Sep  1 13:52:44.287 UTC: As2 LCP:    ACCM 0x000A0000 (0x0206000A0000)

Sep  1 13:52:44.287 UTC: As2 LCP:    AuthProto CHAP (0x0305C22305)

Sep  1 13:52:44.287 UTC: As2 LCP:    MagicNumber 0xA53BCC27 (0x0506A53BCC27)

Sep  1 13:52:44.287 UTC: As2 LCP:    PFC (0x0702)

Sep  1 13:52:44.287 UTC: As2 LCP:    ACFC (0x0802)

Sep  1 13:52:44.287 UTC: As2 LCP:    MRRU 1524 (0x110405F4)

Sep  1 13:52:44.287 UTC: As2 LCP:    EndpointDisc 1 Local

Sep  1 13:52:44.287 UTC: As2 LCP:     (0x131201626F62736C616B652D6E61732D)

Sep  1 13:52:44.287 UTC: As2 LCP:     (0x3031)

Sep  1 13:52:44.479 UTC: As2 LCP: I CONFACK [REQsent] id 13 len 47

Sep  1 13:52:44.479 UTC: As2 LCP:    ACCM 0x000A0000 (0x0206000A0000)

Sep  1 13:52:44.479 UTC: As2 LCP:    AuthProto CHAP (0x0305C22305)

Sep  1 13:52:44.479 UTC: As2 LCP:    MagicNumber 0xA53BCC27 (0x0506A53BCC27)

Sep  1 13:52:44.483 UTC: As2 LCP:    PFC (0x0702)

Sep  1 13:52:44.483 UTC: As2 LCP:    ACFC (0x0802)

Sep  1 13:52:44.483 UTC: As2 LCP:    MRRU 1524 (0x110405F4)

Sep  1 13:52:44.483 UTC: As2 LCP:    EndpointDisc 1 Local

Sep  1 13:52:44.483 UTC: As2 LCP:     (0x131201626F62736C616B652D6E61732D)

Sep  1 13:52:44.483 UTC: As2 LCP:     (0x3031)

Sep  1 13:52:45.279 UTC: As2 LCP: I CONFREQ [ACKrcvd] id 4 len 46

Sep  1 13:52:45.283 UTC: As2 LCP:    ACCM 0x000A0000 (0x0206000A0000)

Sep  1 13:52:45.283 UTC: As2 LCP:    MagicNumber 0x0042C48F (0x05060042C48F)

Sep  1 13:52:45.283 UTC: As2 LCP:    PFC (0x0702)

Sep  1 13:52:45.283 UTC: As2 LCP:    ACFC (0x0802)

Sep  1 13:52:45.283 UTC: As2 LCP:    Callback 6  (0x0D0306)

Sep  1 13:52:45.283 UTC: As2 LCP:    MRRU 1500 (0x110405DC)

Sep  1 13:52:45.283 UTC: As2 LCP:    EndpointDisc 1 Local

Sep  1 13:52:45.283 UTC: As2 LCP:     (0x131301B07502C88EC4420014BE1FC155)

Sep  1 13:52:45.283 UTC: As2 LCP:     (0x370000)

Sep  1 13:52:45.283 UTC: As2 LCP: O CONFREJ [ACKrcvd] id 4 len 7

Sep  1 13:52:45.283 UTC: As2 LCP:    Callback 6  (0x0D0306)

Sep  1 13:52:45.475 UTC: As2 LCP: I CONFREQ [ACKrcvd] id 5 len 43

Sep  1 13:52:45.475 UTC: As2 LCP:    ACCM 0x000A0000 (0x0206000A0000)

Sep  1 13:52:45.475 UTC: As2 LCP:    MagicNumber 0x0042C48F (0x05060042C48F)

Sep  1 13:52:45.475 UTC: As2 LCP:    PFC (0x0702)

Sep  1 13:52:45.475 UTC: As2 LCP:    ACFC (0x0802)

Sep  1 13:52:45.475 UTC: As2 LCP:    MRRU 1500 (0x110405DC)

Sep  1 13:52:45.475 UTC: As2 LCP:    EndpointDisc 1 Local

Sep  1 13:52:45.475 UTC: As2 LCP:     (0x131301B07502C88EC4420014BE1FC155)

Sep  1 13:52:45.475 UTC: As2 LCP:     (0x370000)

Sep  1 13:52:45.475 UTC: As2 LCP: O CONFACK [ACKrcvd] id 5 len 43

Sep  1 13:52:45.475 UTC: As2 LCP:    ACCM 0x000A0000 (0x0206000A0000)

Sep  1 13:52:45.475 UTC: As2 LCP:    MagicNumber 0x0042C48F (0x05060042C48F)

Sep  1 13:52:45.475 UTC: As2 LCP:    PFC (0x0702)

Sep  1 13:52:45.475 UTC: As2 LCP:    ACFC (0x0802)

Sep  1 13:52:45.475 UTC: As2 LCP:    MRRU 1500 (0x110405DC)

Sep  1 13:52:45.475 UTC: As2 LCP:    EndpointDisc 1 Local

Sep  1 13:52:45.475 UTC: As2 LCP:     (0x131301B07502C88EC4420014BE1FC155)

Sep  1 13:52:45.475 UTC: As2 LCP:     (0x370000)

Sep  1 13:52:45.475 UTC: As2 LCP: State is Open

Sep  1 13:52:45.475 UTC: As2 PPP: Phase is AUTHENTICATING, by this end

Sep  1 13:52:45.475 UTC: As2 CHAP: O CHALLENGE id 5 len 36 from "NAS"

Sep  1 13:52:45.667 UTC: As2 CHAP: I RESPONSE id 5 len 37 from "clearlake-lan-01"

Sep  1 13:52:45.667 UTC: As2 CHAP: O SUCCESS id 5 len 4

Sep  1 13:52:45.667 UTC: As2 MLP: Multilink up event pending

Sep  1 13:52:45.667 UTC: As2 PPP: Phase is VIRTUALIZED

Sep  1 13:52:45.667 UTC: Vi1 PPP: Phase is DOWN, Setup

Sep  1 13:52:45.667 UTC: Vi1 MLP: VP: Clone from Vtemplate 1 block=1

Sep  1 13:52:45.767 UTC: Vi1 PPP: Treating connection as a dedicated line

Sep  1 13:52:45.767 UTC: Vi1 PPP: Phase is ESTABLISHING, Active Open

Sep  1 13:52:45.771 UTC: Vi1 LCP: O CONFREQ [Closed] id 1 len 37

Sep  1 13:52:45.771 UTC: Vi1 LCP:    AuthProto CHAP (0x0305C22305)

Sep  1 13:52:45.771 UTC: Vi1 LCP:    MagicNumber 0xA53BD9C1 (0x0506A53BD9C1)

Sep  1 13:52:45.771 UTC: Vi1 LCP:    MRRU 1524 (0x110405F4)

Sep  1 13:52:45.771 UTC: Vi1 LCP:    EndpointDisc 1 Local

Sep  1 13:52:45.771 UTC: Vi1 LCP:     (0x131201626F62736C616B652D6E61732D)

Sep  1 13:52:45.771 UTC: Vi1 LCP:     (0x3031)

Sep  1 13:52:45.771 UTC: Vi1 PPP: Phase is UP

Sep  1 13:52:45.771 UTC: Vi1 IPCP: O CONFREQ [Closed] id 1 len 10

Sep  1 13:52:45.771 UTC: Vi1 IPCP:    Address 172.21.104.254 (0x0306AC1568FE)

Sep  1 13:52:45.771 UTC: As2 MLP: clearlake-lan-01/b07502c88ec4420014be1fc155370000, 
multilink up, first link

Sep  1 13:52:45.771 UTC: As2 IPCP: Remove route to 172.21.104.25

Sep  1 13:52:45.843 UTC: Vi1 IPCP: I CONFREQ [REQsent] id 1 len 40

Sep  1 13:52:45.843 UTC: Vi1 IPCP:    CompressType VJ 15 slots CompressSlotID 
(0x0206002D0F01)

Sep  1 13:52:45.843 UTC: Vi1 IPCP:    Address 0.0.0.0 (0x030600000000)

Sep  1 13:52:45.843 UTC: Vi1 IPCP:    PrimaryDNS 0.0.0.0 (0x810600000000)

Sep  1 13:52:45.843 UTC: Vi1 IPCP:    PrimaryWINS 0.0.0.0 (0x820600000000)

Sep  1 13:52:45.843 UTC: Vi1 IPCP:    SecondaryDNS 0.0.0.0 (0x830600000000)

Sep  1 13:52:45.843 UTC: Vi1 IPCP:    SecondaryWINS 0.0.0.0 (0x840600000000)

Sep  1 13:52:45.843 UTC: Vi1 IPCP: Pool returned 172.21.104.48

Sep  1 13:52:45.843 UTC: Vi1 IPCP: O CONFREJ [REQsent] id 1 len 22

Sep  1 13:52:45.843 UTC: Vi1 IPCP:    CompressType VJ 15 slots CompressSlotID 
(0x0206002D0F01)

Sep  1 13:52:45.843 UTC: Vi1 IPCP:    PrimaryWINS 0.0.0.0 (0x820600000000)

Sep  1 13:52:45.843 UTC: Vi1 IPCP:    SecondaryWINS 0.0.0.0 (0x840600000000)

Sep  1 13:52:45.843 UTC: Vi1 CCP: I CONFREQ [Not negotiated] id 1 len 15

Sep  1 13:52:45.843 UTC: Vi1 CCP:    MS-PPC supported bits 0x00000001 
(0x120600000001)

Sep  1 13:52:45.843 UTC: Vi1 CCP:    Stacker history 1 check mode EXTENDED 
(0x1105000104)

Sep  1 13:52:45.843 UTC: Vi1 LCP: O PROTREJ [Open] id 2 len 21 protocol CCP

Sep  1 13:52:45.843 UTC: Vi1 LCP:  (0x80FD0101000F12060000000111050001)

Sep  1 13:52:45.843 UTC: Vi1 LCP:  (0x04)

Sep  1 13:52:45.939 UTC: Vi1 IPCP: I CONFACK [REQsent] id 1 len 10

Sep  1 13:52:45.939 UTC: Vi1 IPCP:    Address 172.21.104.254 (0x0306AC1568FE)

Sep  1 13:52:47.771 UTC: Vi1 IPCP: TIMEout: State ACKrcvd

Sep  1 13:52:47.771 UTC: Vi1 IPCP: O CONFREQ [ACKrcvd] id 2 len 10

Sep  1 13:52:47.771 UTC: Vi1 IPCP:    Address 172.21.104.254 (0x0306AC1568FE)

Sep  1 13:52:47.923 UTC: Vi1 IPCP: I CONFACK [REQsent] id 2 len 10

Sep  1 13:52:47.923 UTC: Vi1 IPCP:    Address 172.21.104.254 (0x0306AC1568FE)

Sep  1 13:52:48.835 UTC: Vi1 IPCP: I CONFREQ [ACKrcvd] id 2 len 34

Sep  1 13:52:48.835 UTC: Vi1 IPCP:    Address 0.0.0.0 (0x030600000000)

Sep  1 13:52:48.835 UTC: Vi1 IPCP:    PrimaryDNS 0.0.0.0 (0x810600000000)

Sep  1 13:52:48.835 UTC: Vi1 IPCP:    PrimaryWINS 0.0.0.0 (0x820600000000)

Sep  1 13:52:48.835 UTC: Vi1 IPCP:    SecondaryDNS 0.0.0.0 (0x830600000000)

Sep  1 13:52:48.835 UTC: Vi1 IPCP:    SecondaryWINS 0.0.0.0 (0x840600000000)

Sep  1 13:52:48.835 UTC: Vi1 IPCP: O CONFREJ [ACKrcvd] id 2 len 16

Sep  1 13:52:48.835 UTC: Vi1 IPCP:    PrimaryWINS 0.0.0.0 (0x820600000000)

Sep  1 13:52:48.835 UTC: Vi1 IPCP:    SecondaryWINS 0.0.0.0 (0x840600000000)

Sep  1 13:52:49.011 UTC: Vi1 IPCP: I CONFREQ [ACKrcvd] id 3 len 22

Sep  1 13:52:49.011 UTC: Vi1 IPCP:    Address 0.0.0.0 (0x030600000000)

Sep  1 13:52:49.011 UTC: Vi1 IPCP:    PrimaryDNS 0.0.0.0 (0x810600000000)

Sep  1 13:52:49.011 UTC: Vi1 IPCP:    SecondaryDNS 0.0.0.0 (0x830600000000)

Sep  1 13:52:49.011 UTC: Vi1 IPCP: O CONFNAK [ACKrcvd] id 3 len 22

Sep  1 13:52:49.011 UTC: Vi1 IPCP:    Address 172.21.104.48 (0x0306AC156830)

Sep  1 13:52:49.011 UTC: Vi1 IPCP:    PrimaryDNS 172.22.53.210 (0x8106AC1635D2)

Sep  1 13:52:49.011 UTC: Vi1 IPCP:    SecondaryDNS 171.68.10.70 (0x8306AB440A46)

Sep  1 13:52:49.203 UTC: Vi1 IPCP: I CONFREQ [ACKrcvd] id 4 len 22

Sep  1 13:52:49.203 UTC: Vi1 IPCP:    Address 172.21.104.48 (0x0306AC156830)

Sep  1 13:52:49.203 UTC: Vi1 IPCP:    PrimaryDNS 172.22.53.210 (0x8106AC1635D2)

Sep  1 13:52:49.203 UTC: Vi1 IPCP:    SecondaryDNS 171.68.10.70 (0x8306AB440A46)

Sep  1 13:52:49.203 UTC: Vi1 IPCP: O CONFACK [ACKrcvd] id 4 len 22

Sep  1 13:52:49.203 UTC: Vi1 IPCP:    Address 172.21.104.48 (0x0306AC156830)

Sep  1 13:52:49.203 UTC: Vi1 IPCP:    PrimaryDNS 172.22.53.210 (0x8106AC1635D2)

Sep  1 13:52:49.203 UTC: Vi1 IPCP:    SecondaryDNS 171.68.10.70 (0x8306AB440A46)

Sep  1 13:52:49.207 UTC: Vi1 IPCP: State is Open

Sep  1 13:52:49.207 UTC: Vi1 IPCP: Install route to 172.21.104.48

NAS#

NAS#

Sep  1 13:53:41.928 UTC: As5 IPCP: Install route to 172.21.104.24

Sep  1 13:53:43.928 UTC: As5 PPP: Treating connection as a callin

Sep  1 13:53:43.928 UTC: As5 PPP: Phase is ESTABLISHING, Passive Open

Sep  1 13:53:43.928 UTC: As5 LCP: State is Listen

Sep  1 13:53:44.792 UTC: As5 LCP: I CONFREQ [Listen] id 3 len 46

Sep  1 13:53:44.792 UTC: As5 LCP:    ACCM 0x000A0000 (0x0206000A0000)

Sep  1 13:53:44.792 UTC: As5 LCP:    MagicNumber 0x0043B7F1 (0x05060043B7F1)

Sep  1 13:53:44.792 UTC: As5 LCP:    PFC (0x0702)

Sep  1 13:53:44.792 UTC: As5 LCP:    ACFC (0x0802)

Sep  1 13:53:44.792 UTC: As5 LCP:    Callback 6  (0x0D0306)

Sep  1 13:53:44.792 UTC: As5 LCP:    MRRU 1500 (0x110405DC)

Sep  1 13:53:44.792 UTC: As5 LCP:    EndpointDisc 1 Local

Sep  1 13:53:44.792 UTC: As5 LCP:     (0x131301B07502C88EC4420014BE1FC155)

Sep  1 13:53:44.792 UTC: As5 LCP:     (0x370000)

Sep  1 13:53:44.792 UTC: As5 LCP: O CONFREQ [Listen] id 17 len 47

Sep  1 13:53:44.792 UTC: As5 LCP:    ACCM 0x000A0000 (0x0206000A0000)

Sep  1 13:53:44.792 UTC: As5 LCP:    AuthProto CHAP (0x0305C22305)

Sep  1 13:53:44.792 UTC: As5 LCP:    MagicNumber 0xA53CC053 (0x0506A53CC053)

Sep  1 13:53:44.792 UTC: As5 LCP:    PFC (0x0702)

Sep  1 13:53:44.792 UTC: As5 LCP:    ACFC (0x0802)

Sep  1 13:53:44.792 UTC: As5 LCP:    MRRU 1524 (0x110405F4)

Sep  1 13:53:44.796 UTC: As5 LCP:    EndpointDisc 1 Local

Sep  1 13:53:44.796 UTC: As5 LCP:     (0x131201626F62736C616B652D6E61732D)

Sep  1 13:53:44.796 UTC: As5 LCP:     (0x3031)

Sep  1 13:53:44.796 UTC: As5 LCP: O CONFREJ [Listen] id 3 len 7

Sep  1 13:53:44.796 UTC: As5 LCP:    Callback 6  (0x0D0306)

Sep  1 13:53:46.792 UTC: As5 LCP: TIMEout: State REQsent

Sep  1 13:53:46.792 UTC: As5 LCP: O CONFREQ [REQsent] id 18 len 47

Sep  1 13:53:46.792 UTC: As5 LCP:    ACCM 0x000A0000 (0x0206000A0000)

Sep  1 13:53:46.792 UTC: As5 LCP:    AuthProto CHAP (0x0305C22305)

Sep  1 13:53:46.792 UTC: As5 LCP:    MagicNumber 0xA53CC053 (0x0506A53CC053)

Sep  1 13:53:46.792 UTC: As5 LCP:    PFC (0x0702)

Sep  1 13:53:46.792 UTC: As5 LCP:    ACFC (0x0802)

Sep  1 13:53:46.792 UTC: As5 LCP:    MRRU 1524 (0x110405F4)

Sep  1 13:53:46.792 UTC: As5 LCP:    EndpointDisc 1 Local

Sep  1 13:53:46.792 UTC: As5 LCP:     (0x131201626F62736C616B652D6E61732D)

Sep  1 13:53:46.792 UTC: As5 LCP:     (0x3031)

Sep  1 13:53:47.032 UTC: As5 LCP: I CONFACK [REQsent] id 18 len 47

Sep  1 13:53:47.032 UTC: As5 LCP:    ACCM 0x000A0000 (0x0206000A0000)

Sep  1 13:53:47.032 UTC: As5 LCP:    AuthProto CHAP (0x0305C22305)

Sep  1 13:53:47.032 UTC: As5 LCP:    MagicNumber 0xA53CC053 (0x0506A53CC053)

Sep  1 13:53:47.032 UTC: As5 LCP:    PFC (0x0702)

Sep  1 13:53:47.032 UTC: As5 LCP:    ACFC (0x0802)

Sep  1 13:53:47.032 UTC: As5 LCP:    MRRU 1524 (0x110405F4)

Sep  1 13:53:47.032 UTC: As5 LCP:    EndpointDisc 1 Local

Sep  1 13:53:47.032 UTC: As5 LCP:     (0x131201626F62736C616B652D6E61732D)

Sep  1 13:53:47.032 UTC: As5 LCP:     (0x3031)

Sep  1 13:53:47.800 UTC: As5 LCP: I CONFREQ [ACKrcvd] id 4 len 46

Sep  1 13:53:47.800 UTC: As5 LCP:    ACCM 0x000A0000 (0x0206000A0000)

Sep  1 13:53:47.800 UTC: As5 LCP:    MagicNumber 0x0043B7F1 (0x05060043B7F1)

Sep  1 13:53:47.800 UTC: As5 LCP:    PFC (0x0702)

Sep  1 13:53:47.800 UTC: As5 LCP:    ACFC (0x0802)

Sep  1 13:53:47.800 UTC: As5 LCP:    Callback 6  (0x0D0306)

Sep  1 13:53:47.800 UTC: As5 LCP:    MRRU 1500 (0x110405DC)

Sep  1 13:53:47.804 UTC: As5 LCP:    EndpointDisc 1 Local

Sep  1 13:53:47.804 UTC: As5 LCP:     (0x131301B07502C88EC4420014BE1FC155)

Sep  1 13:53:47.804 UTC: As5 LCP:     (0x370000)

Sep  1 13:53:47.804 UTC: As5 LCP: O CONFREJ [ACKrcvd] id 4 len 7

Sep  1 13:53:47.804 UTC: As5 LCP:    Callback 6  (0x0D0306)

Sep  1 13:53:48.008 UTC: As5 LCP: I CONFREQ [ACKrcvd] id 5 len 43

Sep  1 13:53:48.008 UTC: As5 LCP:    ACCM 0x000A0000 (0x0206000A0000)

Sep  1 13:53:48.008 UTC: As5 LCP:    MagicNumber 0x0043B7F1 (0x05060043B7F1)

Sep  1 13:53:48.008 UTC: As5 LCP:    PFC (0x0702)

Sep  1 13:53:48.008 UTC: As5 LCP:    ACFC (0x0802)

Sep  1 13:53:48.008 UTC: As5 LCP:    MRRU 1500 (0x110405DC)

Sep  1 13:53:48.012 UTC: As5 LCP:    EndpointDisc 1 Local

Sep  1 13:53:48.012 UTC: As5 LCP:     (0x131301B07502C88EC4420014BE1FC155)

Sep  1 13:53:48.012 UTC: As5 LCP:     (0x370000)

Sep  1 13:53:48.012 UTC: As5 LCP: O CONFACK [ACKrcvd] id 5 len 43

Sep  1 13:53:48.012 UTC: As5 LCP:    ACCM 0x000A0000 (0x0206000A0000)

Sep  1 13:53:48.012 UTC: As5 LCP:    MagicNumber 0x0043B7F1 (0x05060043B7F1)

Sep  1 13:53:48.012 UTC: As5 LCP:    PFC (0x0702)

Sep  1 13:53:48.012 UTC: As5 LCP:    ACFC (0x0802)

Sep  1 13:53:48.012 UTC: As5 LCP:    MRRU 1500 (0x110405DC)

Sep  1 13:53:48.012 UTC: As5 LCP:    EndpointDisc 1 Local

Sep  1 13:53:48.012 UTC: As5 LCP:     (0x131301B07502C88EC4420014BE1FC155)

Sep  1 13:53:48.012 UTC: As5 LCP:     (0x370000)

Sep  1 13:53:48.012 UTC: As5 LCP: State is Open

Sep  1 13:53:48.012 UTC: As5 PPP: Phase is AUTHENTICATING, by this end

Sep  1 13:53:48.012 UTC: As5 CHAP: O CHALLENGE id 6 len 36 from "NAS"

Sep  1 13:53:48.264 UTC: As5 CHAP: I RESPONSE id 6 len 37 from "clearlake-lan-01"

Sep  1 13:53:48.268 UTC: As5 CHAP: O SUCCESS id 6 len 4

Sep  1 13:53:48.268 UTC: As5 MLP: Multilink up event pending

Sep  1 13:53:48.268 UTC: As5 PPP: Phase is VIRTUALIZED

Sep  1 13:53:48.268 UTC: As5 MLP: clearlake-lan-01/b07502c88ec4420014be1fc155370000, 
multilink up

Sep  1 13:53:48.268 UTC: As5 IPCP: Remove route to 172.21.104.24

NAS#

NAS#

Refer to Table 2-3,Table 2-4 and Table 2-8 for related symptom, problem, and diagnostic notes.

3.7 Cisco IOS show processes cpu Command Output

In the following example command output, the CPU utilization is very low. 

NAS#show processes cpu 


CPU utilization for five seconds: 0%/0%; one minute: 0%; five minutes: 0%

 PID  Runtime(ms)  Invoked  uSecs    5Sec   1Min   5Min TTY Process 

   1      110876   1344651     82   0.00%  0.00%  0.00%   0 Load Meter       

   2         356      3895     91   0.24%  0.02%  0.00%  50 Virtual Exec     

   3     6619420    904515   7318   0.00%  0.06%  0.06%   0 Check heaps

Refer to Table 2-3 and Table 2-5 for related symptom, problem, and diagnostic notes.

3.8 Cisco IOS show ip route Command Output

The following show ip route client-IP-address Cisco IOS command output illustrates the use of this command to determine whether a route to a specific IP address exists. In this case, the route exists and is directly connected via Virtual-Access1. 

NAS#show ip route 172.21.104.48

Routing entry for 172.21.104.48/32

  Known via "connected", distance 0, metric 0 (connected, via interface)

  Redistributing via eigrp 1

  Advertised by eigrp 1

  Routing Descriptor Blocks:

  * directly connected, via Virtual-Access1

      Route metric is 0, traffic share count is 1

Another option is to use the generic form of the command. However, using this command can result in a long output when large routing tables exist in a NAS or router. The following is an example of a show ip route output (with a very small routing table) where the client IP address (172.21.104.48) is found. 

NAS#show ip route

Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP

       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area 

       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2

       E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP

       i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area

       * - candidate default, U - per-user static route, o - ODR

       P - periodic downloaded static route


Gateway of last resort is 172.21.101.1 to network 0.0.0.0

        172.21.0.0/16 is variably subnetted, 12 subnets, 2 masks

D       172.21.200.0/24 [90/284160] via 172.21.101.1, 3w6d, FastEthernet0

D       172.21.10.1/32 [90/156160] via 172.21.101.20, 2w6d, FastEthernet0

D       172.21.10.7/32 [90/412160] via 172.21.101.1, 2w6d, FastEthernet0

D       172.21.10.6/32 [90/156160] via 172.21.101.1, 6w0d, FastEthernet0

D       172.21.10.5/32 [90/412160] via 172.21.101.1, 3w6d, FastEthernet0

C       172.21.10.10/32 is directly connected, Loopback0

C       172.21.104.0/24 is directly connected, Loopback1

D       172.21.99.0/24 [90/309760] via 172.21.101.1, 3w6d, FastEthernet0

C       172.21.101.0/24 is directly connected, FastEthernet0

D       172.21.100.0/24 [90/309760] via 172.21.101.1, 3w6d, FastEthernet0

D       172.21.102.0/24 [90/309760] via 172.21.101.1, 2w6d, FastEthernet0

C       172.21.104.48/32 is directly connected, Virtual-Access1

D EX 172.22.0.0/16 [170/297272576] via 172.21.101.1, 3w6d, FastEthernet0

D*EX 0.0.0.0/0 [170/309760] via 172.21.101.1, 3w6d, FastEthernet0

Refer to Table 2-4 for related symptom, problem, and diagnostic notes.

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