CORE labs: lab5 ,Does virtual-link has a bug in IOS??? really

From: sirus MOGHADASIAN (cyrus.mgh@gmail.com)
Date: Tue Sep 25 2007 - 21:27:21 ART


Hi,

I face a really odd situation, consider diagram in lab5 of core labs , I
want to build two virtual-link between R2--R5 and R5--R1 ,so here is the
configuration of these routers:

Problem: first virtual-link came up for R5-R1 and virtual-link for R2 is
down/down on R5 and up/up on R2, what ever I do I cannot make it to work. so
I save erase virtual-link configurations and save configs and later when I
start lab again and I configure R2-R5 virtual-link first it comes
up!!!!!!!!! but when I do same for R1-R5 it does not work. and same
situation ( virtual-link for R1 down/down on R5 and up/up on R1) , so any
idea what happen there????? IOS version 12.4(5a)

R1:
interface Serial1/0.1 multipoint
 frame-relay interface-dlci 105 ppp Virtual-Template1
 no frame-relay inverse-arp
!
interface Virtual-Template1
 ip address 128.1.125.1 255.255.255.0
!
router ospf 1
 router-id 150.1.1.1
 log-adjacency-changes
 area 125 virtual-link 150.1.5.5
 redistribute eigrp 10 metric 190 subnets
 network 128.1.125.1 0.0.0.0 area 125
 network 128.1.136.1 0.0.0.0 area 0
 network 150.1.1.1 0.0.0.0 area 321
!

R2:
interface Serial1/0.1 multipoint
 frame-relay interface-dlci 205 ppp Virtual-Template1
 no frame-relay inverse-arp
!
!
interface Virtual-Template1
 ip address 128.1.125.2 255.255.255.0
!
router ospf 1
 router-id 150.1.2.2
 log-adjacency-changes
 area 12 stub
 area 125 virtual-link 150.1.5.5
 network 128.1.27.2 0.0.0.0 area 12
 network 128.1.72.2 0.0.0.0 area 0
 network 128.1.125.2 0.0.0.0 area 125
 network 150.1.2.2 0.0.0.0 area 321
!

R5:
interface Serial1/0.1 multipoint
 frame-relay interface-dlci 501 ppp Virtual-Template1
 frame-relay interface-dlci 502 ppp Virtual-Template1
 no frame-relay inverse-arp
!
!
interface Virtual-Template1
 ip address 128.1.125.5 255.255.255.0
!
router ospf 1
 log-adjacency-changes
 area 125 virtual-link 150.1.1.1
 area 125 virtual-link 150.1.2.2
 redistribute rip metric 5120 subnets
 network 128.1.125.5 0.0.0.0 area 125
 network 150.1.5.5 0.0.0.0 area 765
!

any idea??



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