From: Brian Dennis (bdennis@internetworkexpert.com)
Date: Mon Nov 26 2007 - 21:04:09 ART
Looks like you are missing the clock rate command on the DCE side for
starters. Also try changing the username command on R4 to "username R5
password 0 CISCO".
The logic you are using to troubleshoot this isn't correct. If you can't
get the interface even to come up why add on PPP much less authentication?
Also if the line protocol is down you won't be able to ping across the
link. Always try to break these problems down into their simplest form
and troubleshoot from there:
1) Is the line protocol UP/UP on both sides? If not check that both ends
are in the no shutdown state, the clock rate is applied to the DCE side,
neither one of the sides are being used as backup, the line protocol
matches, etc.
2) Now apply the IP addresses and ping.
3) Add on PPP authentication, etc, etc
HTH,
Brian Dennis, CCIE4 #2210 (R&S/ISP-Dial/Security/SP)
bdennis@internetworkexpert.com
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
Toll Free: 877-224-8987
Direct: 775-745-6404 (Outside the US and Canada)
>----- Original Message -----
Subject: ppp problem
Date: Mon, November 26, 2007 15:41
From: advitar84@yahoo.com
> Hello.
>
> I know this has to be a really silly problem but it has eluded me. This
is from IE
> lab 2 3.2
>
>
> I have two routers R4 and R5 directly connected via serial0/1 on both
with a ppp
> link that I can't get to come up. The line protocol is down and i can't
ping the
> other side. When i removed the authentication from the config same
results.
>
> The config on R4 is
>
> username R4 password 0 CISCO
>
> interface Serial0/1
> ip address 132.1.45.4 255.255.255.0
> encapsulation ppp
> ppp authentication chap
> ppp chap hostname R4
> end
> The config on R5 is
>
> username R4 password 0 CISCO
> interface Serial0/1
> ip address 132.1.45.5 255.255.255.0
> encapsulation ppp
> ppp authentication chap
> ppp chap hostname R5
> end
>
>
> Enter configuration commands, one per line. End with CNTL/Z.
> Rack1R5(config)#int s0/1
> Rack1R5(config-if)#shut
> Rack1R5(config-if)#
> *Mar 1 03:43:58.291: Se0/1 PPP: Outbound cdp packet dropped
> Rack1R5(config-if)#
> *Mar 1 03:44:00.295: %LINK-5-CHANGED: Interface Serial0/1, changed
state to
> administratively down
> Rack1R5(config-if)#
> *Mar 1 03:44:00.295: Se0/1 PPP: Sending Acct Event[Down] id[198]
> *Mar 1 03:44:00.295: Se0/1 LCP: State is Closed
> *Mar 1 03:44:00.295: Se0/1 PPP: Phase is DOWN
> Rack1R5(config-if)#no shut
> Rack1R5(config-if)#
> *Mar 1 03:44:04.211: Se0/1 PPP: Outbound cdp packet dropped
> Rack1R5(config-if)#
> *Mar 1 03:44:06.211: %LINK-3-UPDOWN: Interface Serial0/1, changed state
to up
> Rack1R5(config-if)#
> *Mar 1 03:44:06.211: Se0/1 PPP: Using default call direction
> *Mar 1 03:44:06.211: Se0/1 PPP: Treating connection as a dedicated line
> *Mar 1 03:44:06.211: Se0/1 PPP: Session handle[95000197] Session id[407]
> *Mar 1 03:44:06.211: Se0/1 PPP: Phase is ESTABLISHING, Active Open
> *Mar 1 03:44:06.211: Se0/1 LCP: O CONFREQ [Closed] id 209 len 15
> *Mar 1 03:44:06.211: Se0/1 LCP: AuthProto CHAP (0x0305C22305)
> *Mar 1 03:44:06.215: Se0/1 LCP: MagicNumber 0x30BA5F34 (0x050630BA5F34)
> Rack1R5(config-if)#
> *Mar 1 03:44:08.219: Se0/1 LCP: Timeout: State REQsent
> *Mar 1 03:44:08.219: Se0/1 LCP: O CONFREQ [REQsent] id 210 len 15
> *Mar 1 03:44:08.219: Se0/1 LCP: AuthProto CHAP (0x0305C22305)
> *Mar 1 03:44:08.219: Se0/1 LCP: MagicNumber 0x30BA5F34 (0x050630BA5F34)
> Rack1R5(config-if)#
> *Mar 1 03:44:10.235: Se0/1 LCP: Timeout: State REQsent
> *Mar 1 03:44:10.235: Se0/1 LCP: O CONFREQ [REQsent] id 211 len 15
> *Mar 1 03:44:10.235: Se0/1 LCP: AuthProto CHAP (0x0305C22305)
> *Mar 1 03:44:10.235: Se0/1 LCP: MagicNumber 0x30BA5F34 (0x050630BA5F34)
> Rack1R5(config-if)#u
> *Mar 1 03:44:12.251: Se0/1 LCP: Timeout: State REQsent
> *Mar 1 03:44:12.251: Se0/1 LCP: O CONFREQ [REQsent] id 212 len 15
> *Mar 1 03:44:12.251: Se0/1 LCP: AuthProto CHAP (0x0305C22305)
> *Mar 1 03:44:12.251: Se0/1 LCP: MagicNumber 0x30BA5F34 (0x050630BA5F34)
> Rack1R5(config-if)#do u all
> *Mar 1 03:44:14.267: Se0/1 LCP: Timeout: State REQsent
> *Mar 1 03:44:14.267: Se0/1 LCP: O CONFREQ [REQsent] id 213 len 15
> *Mar 1 03:44:14.267: Se0/1 LCP: AuthProto CHAP (0x0305C22305)
> *Mar 1 03:44:14.267: Se0/1 LCP: MagicNumber 0x30BA5F34 (0x050630BA5F34)
> Rack1R5(config-if)#do u all
> All possible debugging has been turned off
> Rack1R5(config-if)#do show ip int brief
> Interface IP-Address OK? Method Status
Protocol
> Ethernet0/0 132.1.5.5 YES NVRAM up
up
> Serial0/0 unassigned YES NVRAM up
up
> Serial0/0.1 132.1.35.5 YES NVRAM up
up
> Ethernet0/1 192.10.1.5 YES NVRAM up
up
> Serial0/1 132.1.45.5 YES NVRAM up
down
> Loopback0 150.1.5.5 YES NVRAM up
up
>
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