CCNP TSHOOT 6.0 - Cisco Learning Home

CCNPv6 TSHOOT
Sample OSPF Troubleshooting Flow
Layer 3
problem
caused by
routing
protocol
failure
Verify
neighbor
availability
Verify route
availability
Verify OSPF linkstate
database
Verify route
selection
© 2009 Cisco Systems, Inc. All rights reserved. TSHOOT v1.0—75
After you have verified that neighbor relationships have been established as expected, verify that the network
topology information for the destination network that you are troubleshooting has been received correctly and
entered into the OSPF link-state database.
The presence or absence of specific topology information in the OSPF link-state database can help isolate the
source of the problem.
Verify the OSPF Link-State Database for Intra-Area Routes
DLS2#show ip ospf database router 10.1.212.1
OSPF Router with ID (10.1.212.1) (Process ID 1)
Router Link States (area 0)
LS age: 60
Options: (No TOS-capability, DC)
LS Type: Router Links
Link State ID: 10.1.212.1
Advertising Router: 10.1.212.1
LS Seq Number: 80000012
Checksum: 0x592C
Length: 60
area Border Router
Number of Links: 3
Link connected to: a Stub Network
(Link ID) Network/subnet number: 10.1.212.1
(Link Data) Network Mask: 255.255.255.255
Number of TOS metrics: 0
TOS 0 Metrics: 1
Link connected to: a Transit Network
(Link ID) Designated Router address: 10.1.2.13
(Link Data) Router Interface address: 10.1.2.13
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