TSHOOT 642-832 Trouble Ticket 12 – IPv6 OSPF

By | March 18, 2011

Following ticket consists of a problem description and existing configuration on the device.

Trouble Ticket Statement:

Click See Topology

DSW1 and R4 cannot ping R2’s loopback or R2’s s0/0/0/0.12 IPv6 address. Initial troubleshooting shows and R2 is not an OSPFv3 neighbor on R3.

image

Configuration on R2

ipv6 unicast-routing
!
ipv6 router ospf 6
router-id 2.2.2.2
!
interface s0/0/0/0/23
ipv6 address 2026::1:1/122

Configuration on R3

ipv6 unicast-routing
!
ipv6 router ospf 6
router-id 3.3.3.3
!
interface s0/0/0/0/23
ipv6 address 2026::1:1/122
ipv6 ospf 6 area 0

Question 1:
What is the solution of the fault condition?
A.Add ipv6 ospf 6 area 0 under S0/0/0/0.23 on R2
B.Add ipv6 ospf 6 area 6 under S0/0/0/0.23 on R2
C.Remove IPv6 address from S0/0/0/0.23 on R2
D.Enable IPv6 routing on S0/0/0/0.23 on R2
Correct Answer: A
Explanation:
Trouble Ticket Test Taking Tips:
Some may find it helpful to follow these step in the Troubleshooting section in order to help you determine which trouble ticket question you are working on:
If client cannot ping the server:
IPCONFIG on client – 169.x.x.x address or real IP address received from the DHCP server?
GOTO ASW1: show interface fa1/0/1 (check err-disabled) – See Port security ticket show interface trunk (check allowed vlans) – check switch – switch connectivity
If above two situations are fine then: show run (check switchport access vlan 10 under fa1/0/1 & fa1/0/2) – see access VLAN ticket
IPCONFIG on client – IP from DHCP: ping from client TO DSW1 IP – No success
GOTO DSW1: show run (check vlan filter and vlan access maps) – see VLAN ACL Ticket
Ping from client -> DSW1 ip – Success ping R4 ip (both interfaces) – No success – GOTO DWS1: show ip eigrp neighbor (check R4 – not a neighbor) show ip protocols (check eigrp AS as 10)
Then GOTO R4: show eigrp neighbor (check DSW1 – not a neighbor) show ip protocols (check eigrp AS as 1) – See EIGRP Ticket if not neighbor or AS issue then ON R4: show run (check route-map names under EIGRP&OSPF redistribution)
REDISTRIBUTION
Ping from client to R2 ip – success ping from client to R1 ip – No success – GOTO R2: show ip ospf neighbor show ip route ospf show run (check ospf authentication commands with R1)
GOTO R1: show ip ospf neighbor show ip route ospf show run (check ospf authentication commands with R2)
Ping from client to R1 – Success ping from R1 to Server – Success ping from R2 to Server – Success ping from DSW1 to Server – Success
GOTO R1: show run (check under NAT access list client’s ip 10.2.0.0 not permitted) – See NAT ACL Ticket
Ping from client to R1 – Success ping from R1 to Server – No success
GOTO R1: show ip bgp neighbor show ip route bgp show ip bgp summary (check neighbor isp ip address is wrong 56 instead of 65) – See BGP ticket if neighbor ips address is correct – ON R1: show run (check under extended edge_security access list 209.65.200.224 in not permitted) – See Layer 3 ACL ticket.

Question 2:
The Fault Condition is related to which technology?
A.IPv6 Addressing
B.Route Redistribution
C.OSPF
D.RIPng
Correct Answer: C

Question 3:
On which device is the fault condition located?
A.DSW1
B.DSW2
C.R2
D.R3
Correct Answer: C