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3-5
Cisco MDS 9000 Family Troubleshooting Guide
OL-5183-02, Cisco MDS SAN-OS Release 1.3
Chapter 3 Troubleshooting Switch Level Issues and Interswitch Connectivity
Troubleshooting E Port Connectivity - ISL Isolation
FCOT info -
Min Speed: 1000
Max Speed: 2000
Module Type: 8
Connector Type: 7
Gigabit Eth Compliance Codes: 0
FC Transmitter Type: 3
Vendor Name: PICOLIGHT
Vendor ID: 0:4:133
Vendor Part Num: PL-XPL-00-S23-28
Vendor Revision Level:
Trunk Info -
trunk vsans (allowed active) (1)
In the above examples, the highligthed rxbuffsize is 2112 bytes. This represents the default settings on
a Cisco MDS 9000 switch interface.
Troubleshooting a ZONE Merge Failures
In the example below the show interface command indicates that the E port did not come up due to a
zone merge failure. (Zoning information is on a per VSAN basis. Therefore, for a TE port, it may be
necessary to verify that the zoning information does not conflict for any allowed VSAN.)
switch# show interface fc2/14
fc2/14 is down (Isolation due to zone merge failure)
Hardware is Fibre Channel, WWN is 20:4e:00:05:30:00:63:9e
vsan is 1
Beacon is turned off
40 frames input, 1056 bytes, 0 discards
0 runts, 0 jabber, 0 too long, 0 too short
0 input errors, 0 CRC, 3 invalid transmission words
0 address id, 0 delimiter
0 EOF abort, 0 fragmented, 0 unknown class
79 frames output, 1234 bytes, 16777216 discards
Received 23 OLS, 14 LRR, 13 NOS, 39 loop inits
Transmitted 50 OLS, 16 LRR, 21 NOS, 25 loop inits
A E port will segment with (isolation due to zone merge failure) if the following are true.
• If the active zonesets on the two switches differ from each other in terms of zone membership
(provided there are zones at either side with identical names )
• If the active zoneset on both switches contain a zone with the same name but with different zone
members
To verify the zoning information use the following commands:
switch# show zone vsan 1
switch# show zoneset vsan 1
Two different approaches may be followed to solve a zone merge failure:
• .Overwrite the zoning configuration of one switch with the other switch’s configuration. This can
be done with the following commands:
switch# zone copy interface fc2/7 import vsan 1
switch# zone copy interface fc2/7 export vsan 1
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