---

---

www.computerbooksonline.com/content/viewe

---

Posted by crouse

www.leaman.org/ccna4/Chapter2

---

Posted by crouse

dl.njfiw.gov.cn/books/cisco/CCNP%20PPT/Bcran/BCR1005a.ppt

---

Posted by crouse

Verifying and troubleshooting PPP can be done with two commands:

• show interfaces
• debug ppp authentication

The show interfaces command will show you if the line protocol is up or down and the state of LCP. LCP will report in the closed state if it was unable to establish a connection to another router. Following is a sample output from the

Sleepy router:
Sleepy(config)#show interfaces serial0
serial0 is up, line protocol is up
Hardware is QUICC
MTU 1500 bytes, BW 64 Kbit, DLY 20000 usec, rely 255/255, load 1/255
Encapsulation PPP, loopback not set, keepalive not set
LCP Open
Closed: IPXCP
Listen: CCP
Open: IPCP, CDPCP
<...output omitted...>

The debug ppp authentication command will show you your authentication as it happens. Following is the output of this command on a router using CHAP authentication:

Sleepy#debug ppp authentication
PPP serial0: Send CHAP challenge id=34 to remote
PPP serial0: CHAP challenge from Bashful
PPP serial0: CHAP response received from Bashful
PPP serial0: CHAP response id=34 received from Bashful
PPP serial0: send CHAP success id=34 to remote

---

Posted by steve10

Please visit:

dl.njfiw.gov.cn/books/cisco/CCNP%20PPT/Bcran/BCR1005a.ppt

---

Posted by sagitraz