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Dialer Interface Question

benolyndav
Level 4
Level 4

Hi

How do I check that all is ok with a Dialer Interface which is using Chap for authentication, is there any basic commands I can run to check all is ok, also I notice that the Dialer Interface dosent get an IP Address and never has but it does get a Default Route via the ISP is this common, Its been working fine untill recently.

 

Thanks

1 Accepted Solution

Accepted Solutions

TTTTERR.png

add you sure you use

ip add nego 

under the interface ?

also this x.x.x.x/ is the IP or hostname ?

if it IP it must then show in 

show ip interface brief <<- with virtual interface 

MHM

View solution in original post

13 Replies 13

Hello
review this document 

https://www.cisco.com/c/en/us/support/docs/long-reach-ethernet-lre-digital-subscriber-line-xdsl/asymmetric-digital-subscriber-line-adsl/71115-adslguide-pppoa-ts.html

 


Please rate and mark as an accepted solution if you have found any of the information provided useful.
This then could assist others on these forums to find a valuable answer and broadens the community’s global network.

Kind Regards
Paul

@paul driver 

2w3d: Di1 IPCP: Install negotiated IP interface address 40.1.1.2
2w3d: Di1 IPCP: Install route to 20.20.2.1

I never see the install negotiated IP Interface address but do see the Install Route to x.x.x.x, 
the Dialer Interface never gets an IP Address and never has. is this normal 

Shut/no shut interface and check

Show ip interface breif 

Sometimes it ISP dhcp issue not your router issue.

MHM

Run

Debug ppp nego 

Then shut/no shut interface 

Share debug here 

MHM

@MHM Cisco World 

VPN-Router-1#debug ppp authentication

PPP authentication debugging is on

VPN-Router-1#conf t

VPN-Router-1(config)#interface dialer 1

VPN-Router-1(config-if)#shu

VPN-Router-1(config-if)#shutdown

VPN-Router-1(config-if)#no shut

*Oct  7 15:14:20.462: %DIALER-6-UNBIND: Interface Vi2 unbound from profile Di1

*Oct  7 15:14:20.462: Di1 DDR: dialer shutdown complete

*Oct  7 15:14:20.466: %LINEPROTO-5-UPDOWN: Line protocol on Interface Virtual-Access2, changed state to down

VPN-Router-1(config-if)#

*Oct  7 15:14:20.466: %LINK-3-UPDOWN: Interface Virtual-Access2, changed state to down

VPN-Router-1(config-if)#

*Oct  7 15:14:22.462: %LINK-5-CHANGED: Interface Dialer1, changed state to administratively down

*Oct  7 15:14:32.588: %LINK-3-UPDOWN: Interface Dialer1, changed state to up

VPN-Router-1(config-if)#exit

VPN-Router-1(config)#exit

VPN-Router-1#

*Oct  7 15:14:41.738: %SYS-5-CONFIG_I: Configured from console by local on console

*Oct  7 15:14:42.702: %DIALER-6-BIND: Interface Vi2 bound to profile Di1

*Oct  7 15:14:42.710: %LINK-3-UPDOWN: Interface Virtual-Access2, changed state to up

*Oct  7 15:14:42.710: Vi2 PPP: Using dialer call direction

*Oct  7 15:14:42.710: Vi2 PPP: Treating connection as a callout

*Oct  7 15:14:42.710: Vi2 PPP: Session handle[8A000007] Session id[4]

*Oct  7 15:14:42.754: Vi2 CHAP: I CHALLENGE id 1 len 77 from "bcf-aln2.wf"

*Oct  7 15:14:42.754: Vi2 PPP: Sent CHAP SENDAUTH Request

*Oct  7 15:14:42.754: Vi2 PPP: Received SENDAUTH Response FAIL

*Oct  7 15:14:42.754: Vi2 CHAP: Using hostname from interface CHAP

*Oct  7 15:14:42.754: Vi2 CHAP: Using password from interface CHAP

*Oct  7 15:14:42.754: Vi2 CHAP: O RESPONSE id 1 len 47 from "Lotpfortffr3@mybroadband.si1"

*Oct  7 15:14:42.826: Vi2 PPP: Using dialer call direction

VPN-Router-1#

*Oct  7 15:14:42.826: Vi2 PPP: Treating connection as a callout

*Oct  7 15:14:42.826: Vi2 PPP: Session handle[2D000008] Session id[4]

*Oct  7 15:14:42.878: Vi2 CHAP: I CHALLENGE id 2 len 41 from "FB-LON05-CRI-LNS-001"

*Oct  7 15:14:42.878: Vi2 PPP: Sent CHAP SENDAUTH Request

*Oct  7 15:14:42.878: Vi2 PPP: Received SENDAUTH Response FAIL

*Oct  7 15:14:42.878: Vi2 CHAP: Using hostname from interface CHAP

*Oct  7 15:14:42.878: Vi2 CHAP: Using password from interface CHAP

*Oct  7 15:14:42.878: Vi2 CHAP: O RESPONSE id 2 len 47 from "Lotpfortffr3@mybroadband.si1"

*Oct  7 15:14:43.902: Vi2 CHAP: I SUCCESS id 2 len 4

VPN-Router-1#

*Oct  7 15:14:43.902: %LINEPROTO-5-UPDOWN: Line protocol on Interface Virtual-Access2, changed state to up

Received SENDAUTH Response FAIL <<- let me check this error' it CHAP auth issue that why peer not get IP.

MHM

Show ppp all <<- share this please 

MHM

@MHM Cisco World 

VPN-Router-1.#show ppp all

Interface/ID OPEN+ Nego* Fail- Stage Peer Address Peer Name

------------ --------------------- -------- --------------- --------------------

Vi2 LCP+ IPCP+ CDPCP-            LocalT   x.x.x.x \

TTTTERR.png

add you sure you use

ip add nego 

under the interface ?

also this x.x.x.x/ is the IP or hostname ?

if it IP it must then show in 

show ip interface brief <<- with virtual interface 

MHM

thanks fir the useful reply I checked again and contacted the ISP regarding your Interface comment

Hello


@benolyndav wrote:
2w3d: Di1 IPCP: Install negotiated IP interface address 40.1.1.2
2w3d: Di1 IPCP: Install route to 20.20.2.1

I never see the install negotiated IP Interface address but do see the Install Route to x.x.x.x, 
the Dialer Interface never gets an IP Address and never has. is this normal 


You should be seeing a route and a negoicated ip address , Looks like a possible authentication credential issue?
Have you verified the correct credentials with your ISP?  - hostname & password?

Can you post the following please?
sh run int  x/x  (physical interface used for PPP)
sh run | sec dialer

sh ip int brief
sh ip route



 

 


Please rate and mark as an accepted solution if you have found any of the information provided useful.
This then could assist others on these forums to find a valuable answer and broadens the community’s global network.

Kind Regards
Paul

@paul driver 
Can I DM you that info ??

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