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11-24
Cisco MDS 9000 Family Troubleshooting Guide, Release 3.x
OL-9285-05
Chapter 11 Troubleshooting VSANs, Domains, and FSPF
FSPF Issues
FSPF Issues
The implementation of VSANs dictates that each configured VSAN support a separate set of fabric
services. One such service is the FSPF routing protocol, which can be independently configured per
VSAN. Therefore, within each VSAN topology, FSPF can be configured to provide a unique routing
configuration and resulting traffic flow. Using the traffic engineering capabilities offered by VSANs
allows greater control over traffic within the fabric and higher utilization of the deployed fabric
resources.
This section describes how to identify and resolve Fabric Shortest Path First (FSFP) problems. It
includes the following topics:
• Troubleshooting FSPF, page 11-24
• Loss of Two-Way Communication, page 11-28
Troubleshooting FSPF
Figure 11-1 shows a single VSAN topology.
Figure 11-1 Single VSAN Topology
For the purpose of this example, assume that all interfaces are located in VSAN 1.
Metric 1000
Metric 1000
Metric 1000
Metric 1000
Domain_ID
1
Switch2
Domain_ID
239
Switch3
Domain_ID
237
Switch1
Domain_ID
238
Switch5
Port 3
Index
0x00010002
Port 4
Index
0x00010003
Port 2
Index
0x00010001
Port 2
Index
0x00010001
Port 1
Index
0x00010000
Port 1
Index
0x00010001
Port 2
Index
0x00010001
Port 4
Index
0x00010003
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