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4-13
Cisco MDS 9000 Family Troubleshooting Guide
OL-5183-02, Cisco MDS SAN-OS Release 1.3
Chapter 4 Troubleshooting Switch Fabric Level Issues
Troubleshooting FSPF Issues
View the output from this command to verify that the interface is in FSPF “active state.” The system
output looks like this:
switch1# show fspf vsan 1 interface fc1/2
FSPF interface fc1/2 in VSAN 1
FSPF routing administrative state is active -----1
Interface cost is 1000 -----2
Timer intervals configured, Hello 20 s, Dead 80 s, Retransmit 5 s -----3
FSPF State is FULL -----4
Neighbor Domain Id is 1, Neighbor Interface index is 0x00010002 -----5
Statistics counters :
Number of packets received : LSU 46 LSA 24 Hello 103 Error packets 0
Number of packets transmitted : LSU 24 LSA 45 Hello 104 Retransmitted LSU 0
Number of times inactivity timer expired for the interface = 0
This displays the number of packets; Hellos should be received every 20 seconds.
1. Indicates that FSPF is active and is not disabled on this interface.
2. Indicates the cost of the path out this interface.
3. Identifies the configured FSPF timers for this interface, which must match on both sides.
4. Indicates Full State or Adjacent. Sent and received all database exchanges and required Acks. Port
is now ready to route frames.
5. Provides FSPF neighbor information.
Step 3 Verify that all FC routes are available by entering the following command:
switch1# show fspf internal route v 1
The system output looks like this:
switch1# show fspf internal route v 1
FSPF Unicast Routes
---------------------------
VSAN Number Dest Domain Route Cost Next hops
----------------------------------------------------------------------------------------
1 0x01(1) 1000 fc1/2
1 0xEF(239) 1000 fc1/1
1 0xED(238) 2000 fc1/1
fc1/2
This shows the total cost of all links.
fc1/2
The next hop to (238) has two interfaces. This indicates that both paths will be used during load sharing.
Up to sixteen paths can be used by FSPF with a Cisco MDS 9000 Family switch.
FSPF Issues in a Multi-VSAN Environment
With the implementation of VSANs used with Cisco MDS 9000 Family switches, a separate instance of
FSPF runs within each VSAN, and each instance is independent of the others. For this reason, FSPF
issues affecting one VSAN have no effect on FSPF running in other VSANs.
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