Switch Cannot See Other Switches In A Vsan; Fc Domain Id Overlap - Cisco 9134 - MDS Multilayer Fabric Switch Troubleshooting Manual

Domain Issues
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
Two switch fabrics might not merge. If two fabrics with two or more switches are connected, and they
have at least one assigned domain ID in common, and the auto-reconfigure option is disabled (this option
is disabled by default), then the E ports that are used to connect the two fabrics will be isolated due to
domain ID overlap.

Switch Cannot See Other Switches in a VSAN

Symptom
Table 11-13 Switch Cannot See Other Switches in a VSAN
Symptom Possible Cause
Switch cannot see Switch is isolated because of a domain
other switches in a ID overlap.
VSAN.
Fabric timers are misconfigured.

FC Domain ID Overlap

To resolve an FC domain ID overlap, you can either change the overlapping static domain ID by
manually configuring a new static domain ID for the isolated switch, or disable the static domain
assignment and allow the switch to request a new domain ID after a fabric reconfiguration.
•
•
You may see the following system message in the message log when a domain ID overlap occurs:
Error Message PORT-5-IF_DOWN_DOMAIN_OVERLAP_ISOLATION: Interface [chars] is down
(Isolation due to domain overlap).
Cisco MDS 9000 Family Troubleshooting Guide, Release 3.x
11-18
Switch cannot see other switches in a VSAN.
To assign a static domain ID, see the
on page 11-19 or the "Assigning a New Domain ID Using the CLI" section on page
To assign a dynamic domain ID after a fabric reconfiguration, see the
for Domain ID Assignments" section on page
The interface is isolated because of a domain overlap.
Explanation
Use the show fcdomain domain-list to determine which domain IDs are
Recommended Action
overlapping. Use the fcdomain domain domain-id [static | preferred] vsan vsan-id CLI command
or similar Fabric Manager procedure to change the domain ID for one of the overlapping domain
IDs.
Chapter 11 Troubleshooting VSANs, Domains, and FSPF
Solution
Either change the overlapping static domain ID by
manually configuring a new static domain ID for the
isolated switch, or disable the static domain assignment
and allow the switch to request a new domain ID after a
fabric reconfiguration.
See the "FC Domain ID Overlap" section on page
See the "Resolving Fabric Timer Issues Using Fabric
Manager" section on page 11-9
Timer Issues Using the CLI" section on page
"Assigning a New Domain ID Using Fabric Manager" section
11-20.
11-18.
or the "Resolving Fabric
11-9.
11-19.
"Using Fabric Reconfiguration
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