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6-63

Configuring the Data Link Layer Protocol for E1, T1, and Serial Interfaces

Troubleshooting Logical Interfaces

Figure 6-23. debug ppp negotiation

Troubleshooting PPP Authentication

If you are troubleshooting a PPP connection and you notice that the LCP state

is continually going up and down, it is possible that one or both of the peers

cannot authenticate themselves. You can view debug authentication messages

to determine whether the local or the remote router has failed to authenticate

itself. When troubleshooting PAP, you can also view the usernames and

passwords the routers are sending.

To monitor the PPP authentication process, enter the following command

from the enable mode context:

ProCurve# debug ppp authentication

Troubleshooting PAP. If you are using PAP authentication, look for mes-

sages such as those shown in Figure 6-24.

2005.08.12 17:51:01 PPP.NEGOTIATION PPPrx[e1 1/1] LCP: Conf-Ack ID=33 Len=16 ACCM(00000000)

MAGIC(d418e92e)

2005.08.12 17:51:02 PPP.NEGOTIATION PPPrx[e1 1/1] LCP: Conf-Req ID=188 Len=16

ACCM(00000000) MAGIC(2656e0ba)

2005.08.12 17:51:02 PPP.NEGOTIATION PPPtx[e1 1/1] LCP: Conf-Ack ID=188 Len=16

ACCM(00000000) MAGIC(2656e0ba)

2005.08.12 17:51:02 PPP.NEGOTIATION PPPFSM: layer up, Protocol=c021

2005.08.12 17:51:02 PPP.NEGOTIATION e1 1/1: LCP up

2005.08.12 17:51:02 PPP.NEGOTIATION PPPtx[e1 1/1] LLDPCP: Conf-Req ID=1 Len=4

2005.08.12 17:51:02 PPP.NEGOTIATION PPPtx[e1 1/1] IPCP: Conf-Req ID=1 Len=10 IP (10.1.1.1)

2005.08.12 17:51:02 PPP.NEGOTIATION PPPrx[e1 1/1] LCP: Identification MAGIC(2656e0ba)

Msg(A04)

2005.08.12 17:51:02 PPP.NEGOTIATION PPPrx[e1 1/1] IPCP: Conf-Req ID=1 Len=22 IP(10.3.3.2)

PriDNS(0.0.0.0) SecDNS(0.0.0.0)

2005.08.12 17:51:02 PPP.NEGOTIATION PPPtx[e1 1/1] IPCP: Conf-Rej ID=1 Len=16

PriDNS(0.0.0.0) SecDNS(0.0.0.0)2005.08.12 17:51:02 PPP.NEGOTIATION PPPrx[e1 1/1] LCP:

ProtoRej (82cc)

2005.08.12 17:51:02 PPP.NEGOTIATION PPPrx[e1 1/1] IPCP: Conf-Ack ID=1 Len=10 IP(10.1.1.1)

2005.08.12 17:51:02 INTERFACE_STATUS.ppp 1 changed state to up

2005.08.12 17:51:02 PPP.NEGOTIATION PPPrx[e1 1/1] IPCP: Conf-Req ID=2 Len=10 IP(10.3.3.2)

2005.08.12 17:51:02 PPP.NEGOTIATION PPPtx[e1 1/1] IPCP: Conf-Ack ID=2 Len=10 IP(10.3.3.2)

2005.08.12 17:51:02 PPP.NEGOTIATION PPPFSM: layer up, Protocol=8021

2005.08.12 17:51:02 PPP.NEGOTIATION ppp 1: IPCP up

LCP successful

NCP successful

HP ProCurve 7000dl Series User Manual

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