S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m
11-28
Cisco MDS 9000 Family Troubleshooting Guide, Release 3.x
OL-9285-05
Chapter 11 Troubleshooting VSANs, Domains, and FSPF
FSPF Issues
Loss of Two-Way Communication
If FSPF is misconfigured, then the switches will not reach the “two-way” state.
The following events occur when two-way communication is lost:
•
The port enters Init state and removes its neighbor’s domain ID from the Recipient Domain ID field
and inserts 0xFFFFFFFF.
•
FSPF removes the Inter-Switch Link (ISL) from the topology database.
•
New link state records (LSRs) are flooded to adjacent switches to notify them that the FSPF database
has changed.
Symptom
Traffic is not being routed through the fabric.
Resolving a Wrong Hello Interval on an ISL Using Device Manager
To resolve a wrong hello interval on an ISL using Device Manager, follow these steps:
Step 1
Choose
FC > Advanced > FSPF
and select the
Interfaces
tab to verify that the FSPF parameters are
correct for each interface and check the Hello interval column and the State column.
•
The Intervals column shows the configured FSPF timers for this interface, which must match on both
sides.
•
The State column shows the full or adjacent state if the interface has sent and received all database
exchanges and required Acks. The port is now ready to route frames.
Step 2
Repeat
Step 1
to determine the value of the hello interval on the adjacent switch.
Step 3
Fill in the Hello field to change the hello interval and click
Apply
.
Table 11-17
Traffic Is not Being Routed Through the Fabric
Symptom
Possible Cause
Solution
Traffic is not being
routed through the
fabric.
FSPF hello interval misconfigured.
See the
“Resolving a Wrong Hello Interval on an ISL Using
Device Manager” section on page 11-28
or the
“Resolving
a Wrong Hello Interval on an ISL Using the CLI” section
on page 11-29
.
FSPF retransmit time misconfigured.
See the
“Resolving a Mismatched Retransmit Interval on
an ISL Using Device Manager” section on page 11-30
or
the
“Resolving a Mismatched Retransmit Interval on an
ISL Using the CLI” section on page 11-30
.
FSPF dead interval misconfigured.
See the
“Resolving a Mismatch in Dead Intervals on an ISL
Using Fabric Manager” section on page 11-31
or the
“Resolving a Mismatch in Dead Intervals on an ISL Using
the CLI” section on page 11-31
.
There is a region mismatch on the
switch.
See the
“Resolving a Region Mismatch Using Fabric
Manager” section on page 11-32
or the
“Resolving a
Region Mismatch Using the CLI” section on page 11-32
.
