chap fails is hostname is not used on PPPoFR

Group,

Task is to authenticate R6 with BB1 over PPPoFR.

Rack1R6 (s0/0/0)--------------FR------------------- (s0/0/0) BB1

*BB1 is pre-configured as follows:*

username ROUTER6 password 0 CISCO
!
interface Virtual-Template1
 ip address 54.1.7.254 255.255.255.0
 ppp authentication chap
!
interface Serial0/0/0.201 point-to-point
 frame-relay interface-dlci 201 ppp Virtual-Template1
!

*Task instructions are -*

1) BB1 will send authentication challenge with username=BB1
2) R6 should reply with username=ROUTER6 and MD5 password = CISCO
3) Do not use global "username " command for this task.

*Configured the following on R6*

interface Serial0/0/0
 no ip address
 encapsulation frame-relay
 no fair-queue
 frame-relay interface-dlci 201 ppp Virtual-Template1
!
!
interface Virtual-Template1
 ip address 54.1.7.6 255.255.255.0
 ppp authentication chap
 ppp chap hostname ROUTER6
 ppp chap password 0 CISCO

*Authentication fails with these messages*

*Apr 6 00:22:54.938: Vi1 PPP: Authorization required
*Apr 6 00:22:54.950: Vi1 CHAP: O CHALLENGE id 51 len 28 from "ROUTER6"
*Apr 6 00:22:54.958: Vi1 CHAP: I CHALLENGE id 51 len 24 from "BB1"
*Apr 6 00:22:54.962: Vi1 CHAP: Using hostname from interface CHAP
*Apr 6 00:22:54.962: Vi1 CHAP: Using password from interface CHAP
*Apr 6 00:22:54.962: Vi1 CHAP: O RESPONSE id 51 len 28 from "ROUTER6"
*Apr 6 00:22:54.966: Vi1 CHAP: I RESPONSE id 51 len 24 from "BB1"
*Apr 6 00:22:54.966: Vi1 PPP: Sent CHAP LOGIN Request
*Apr 6 00:22:54.966: Vi1 PPP: Received LOGIN Response FAIL
*Apr 6 00:22:54.966: Vi1 CHAP: O FAILURE id 51 len 25 msg is
"Authentication failed"

*Re-configured R6 as follows:*

username BB1 password 0 CISCO
!
interface Serial0/0/0
 no ip address
 encapsulation frame-relay
 no fair-queue
 frame-relay interface-dlci 201 ppp Virtual-Template1
!
interface Virtual-Template1
 ip address 54.1.7.6 255.255.255.0
 ppp authentication chap

*Re-configured BB1 as follows:
*
username Rack1R6 password 0 CISCO
no username ROUTER6 password 0 CISCO
!
interface Virtual-Template1
 ip address 54.1.7.254 255.255.255.0
 ppp authentication chap
!
interface Serial0/0/0.201 point-to-point
 frame-relay interface-dlci 201 ppp Virtual-Template1
!

*Authetication was successful this time*

*Apr 6 01:01:07.778: Vi1 CHAP: O CHALLENGE id 93 len 28 from "Rack1R6"
*Apr 6 01:01:07.782: Vi1 CHAP: I CHALLENGE id 93 len 24 from "BB1"
*Apr 6 01:01:07.782: Vi1 CHAP: Using hostname from unknown source
*Apr 6 01:01:07.782: Vi1 CHAP: Using password from AAA
*Apr 6 01:01:07.782: Vi1 CHAP: O RESPONSE id 93 len 28 from "Rack1R6"
*Apr 6 01:01:07.802: Vi1 CHAP: I RESPONSE id 93 len 24 from "BB1"
*Apr 6 01:01:07.802: Vi1 PPP: Sent CHAP LOGIN Request
*Apr 6 01:01:07.802: Vi1 PPP: Received LOGIN Response PASS
*Apr 6 01:01:07.802: Vi1 PPP: Sent LCP AUTHOR Request
*Apr 6 01:01:07.802: Vi1 PPP: Sent IPCP AUTHOR Request
*Apr 6 01:01:07.802: Vi1 LCP: Received AAA AUTHOR Response PASS
*Apr 6 01:01:07.802: Vi1 IPCP: Received AAA AUTHOR Response PASS
*Apr 6 01:01:07.802: Vi1 CHAP: O SUCCESS id 93 len 4
*Apr 6 01:01:07.806: Vi1 CHAP: I SUCCESS id 93 len 4
*Apr 6 01:01:07.810: Vi1 PPP: Sent IPCP AUTHOR Request
**Apr 6 01:01:08.806: %LINEPROTO-5-UPDOWN: Line protocol on Interface
Virtual-Access1, changed state to up*

Can someone please help me understand what went wrong ? The solution for
this task is exactly what was configured on R6, the first time. Am concerned
that about connections to Backbone routers in the lab. If they fail to
establish, the rest of the lab cannot be completed.

TIA,
Naveen.

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Received on Sun Apr 05 2009 - 18:19:49 ART