Dialer Interface Question

[benolyndav]

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

[paul driver]

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

[benolyndav]

@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 

[MHM Cisco World]

Shut/no shut interface and check

Show ip interface breif 

Sometimes it ISP dhcp issue not your router issue.

MHM

[benolyndav]

@MHM Cisco World 
Thanks see reply tp @paul driver 

[MHM Cisco World]

Run

Debug ppp nego 

Then shut/no shut interface 

Share debug here 

MHM

[benolyndav]

@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

[MHM Cisco World]

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

MHM

[MHM Cisco World]

Show ppp all <<- share this please 

MHM

[benolyndav]

@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 \

[MHM Cisco World · Accepted solution]

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

[benolyndav]

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

[paul driver]

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

[benolyndav]

@paul driver 
Can I DM you that info ??