From: Ricky Martin (rickycool@gmail.com)
Date: Sat Apr 23 2005 - 00:41:20 GMT-3
Hi,
Thanx for all your inputs. But it left me wondering what wrong i did.
I reconfigured it later and it worked perfectly fine.
Edwards, I disagree the question was worded like "When R5 calls R4, R4
should cancle the call and callback" So i would say R4 should have
callback accept and R5 have callback request. Ty for your input
though.
Cheers
Ricky
On 4/22/05, Edwards, Andrew M <andrew.m.edwards@boeing.com> wrote:
> Ricky,
>
> It looks like your callback configurations are backwards per the
> requirements and how to setup callback with the map-class <name> dialer.
>
> On R4 you want:
>
> Ppp callback request
>
> */ remove the map-class from R4 it belongs on R5 the callback server
>
> On R5 you want:
>
> Ppp callback accept
>
> Give that whirl!
>
> HTH,
> Andy
>
> -----Original Message-----
> From: Ricky Martin [mailto:rickycool@gmail.com]
> Sent: Friday, April 22, 2005 1:20 AM
> To: Cisco certification
> Subject: PPP callback
>
> This seemed to be simple at the start. But i am doing my lab now and i
> am not able to get this thing working. Maybe i am missing something.
> Could u guys spot whats wrong with the config
>
> R4--ISDN---R5
>
> 1.legacy ISDN DDR between R4 and R5
> 2.Intresting traffic is icmp ping
> 3.idle timeoute is 60 either
> 4.ISDN calls should be originated from R4. configure your network so
> that when R5 calls R4, R4 initiates PPP callback 5.To ensure the
> authenticity of the device which calls R5 back, configure your network
> so that R5 issues a PPP authentication challenge after receiving back
> 6.R4 should respond to R5's challege with the username ROUTER4 and a
> hash value of the password CISCO 7.R5 should not issue this
> authentication challenge when it is calling R4
>
> My config
>
> R4
>
> username Rack3R5 password 0 CISCO
>
> interface BRI0/0
> ip address 167.3.45.4 255.255.255.0
> ip router isis
> encapsulation ppp
> dialer idle-timeout 60 either
> dialer map ip 167.3.45.5 name Rack3R5 class CALLBACK broadcast 5272035
> dialer callback-secure
> dialer-group 1
> isdn switch-type basic-ni
> isdn spid1 5272034
> ppp callback accept
> ppp authentication chap
> ppp chap hostname ROUTER4
>
> map-class dialer CALLBACK
> dialer callback-server username
>
> access-list 100 permit icmp any any echo
> dialer-list 1 protocol ip list 100
>
> ! R5
>
> username ROUTER4 password 0 CISCO
>
> interface BRI0/0
> ip address 167.3.45.5 255.255.255.0
> ip router isis
> encapsulation ppp
> dialer idle-timeout 60
> dialer map ip 167.3.45.4 name ROUTER4 broadcast 5272034
> dialer-group 1
> isdn switch-type basic-ni
> isdn spid1 5272035
> ppp callback request
> ppp authentication chap callin
>
> access-list 100 permit icmp any any echo
> dialer-list 1 protocol ip list 100
>
> The error i get is authentication failure
>
> Rack3R4#ping 167.3.45.5
>
> Type escape sequence to abort.
> Sending 5, 100-byte ICMP Echos to 167.3.45.5, timeout is 2 seconds: ..
> *Mar 1 00:36:15.213: %LINK-3-UPDOWN: Interface BRI0/0:1, changed state
> to up *Mar 1 00:36:15.221: BR0/0:1 PPP: Using dialer call direction *Mar
> 1 00:36:15.221: BR0/0:1 PPP: Treating connection as a callout *Mar 1
> 00:36:15.221: BR0/0:1 PPP: Authorization NOT required *Mar 1
> 00:36:15.241: BR0/0:1 CHAP: O CHALLENGE id 9 len 28 from "ROUTER4" *Mar
> 1 00:36:15.253: BR0/0:1 CHAP: I CHALLENGE id 7 len 28 from "Rack3R5"
> *Mar 1 00:36:15.257: BR0/0:1 CHAP: Using hostname from interface CHAP
> *Mar 1 00:36:15.257: BR0/0:1 CHAP: Using password from AAA *Mar 1
> 00:36:15.257: BR0/0:1 CHAP: O RESPONSE id 7 len 28 from "ROUTER4" *Mar 1
> 00:36:15.281: BR0/0:1 CHAP: I FAILURE id 7 len 25 msg is "Authentication
> failed" *Mar 1 00:36:15.337: %ISDN-6-CONNECT: Interface BRI0/0:1 is now
> connected to 52 72035 . *Mar 1 00:36:15.337: %LINK-3-UPDOWN: Interface
> BRI0/0:1, changed state to down. . Success rate is 0 percent (0/5)
> Rack3R4#
>
> TIA for any input
> Ricky
>
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