Cisco MDS 9000 Series Configuration Manual page 162

Zoning Types
fc1/1 Host interface
Entry#
1
2
3
4
fc1/2 - Target1 interface
Entry#
1
2
3
4
fc1/3 - Target2 interface
Entry#
1
2
3
4
fc1/4 - Target3 interface
Entry#
1
2
3
4
The above example demonstrates that the number of TCAM entries consumed by a zone (N) is equal to
N*(N-1). So, a zone with four members would have used a total of 12 TCAM entries (4*3 = 12).
The above example shows two entries in each of the target interfaces (fc1/2-fc1/4) that are probably not needed
since it is usually not advantageous to zone multiple targets together. For example, in fc1/2, there is an entry
that permits Target1 to communicate with Target2, and an entry that permits Target1 to communicate with
Target3.
As these entries are not needed and could even be detrimental, they should be avoided. You can avoid the
addition of such entries by using single-initiator or single-target zones (or use Smart Zoning).
Note If the same two devices are present in more than one zone in a zone set, TCAM programming will not be
repeated.
The following example shows a zone that is changed to three separate zones:
zone1
member host (FCID 010001)
member target1 (FCID 010002)
zone2
member host (FCID 010001)
member target2 (FCID 010003)
zone3
member host (FCID 010001)
member target3 (FCID 010004)
In such a scenario, the following is the ACL programming:
fc1/1 - Host interface - This would look the same
Entry#
1
2
3
Cisco MDS 9000 Series Fabric Configuration Guide, Release 8.x
140
Source ID Mask
010001 ffffff
010001 ffffff
010001 ffffff
000000 000000
Source ID Mask
010002 ffffff
010002 ffffff
010002 ffffff
000000 000000
Source ID Mask
010003 ffffff
010003 ffffff
010003 ffffff
000000 000000
Source ID Mask
010004 ffffff
010004 ffffff
010004 ffffff
000000 000000
Source ID Mask
010001 ffffff
010001 ffffff
010001 ffffff
Destination ID
010002(target1)
010003(target2)
010004(target3)
000000
Destination ID
010001(host)
010003(target2)
010004(target3)
000000
Destination ID
010001(host)
010002(target1)
010004(target3)
000000
Destination ID
010001(host)
010002(target1)
010003(target2)
000000
Destination ID
010002(target1)
010003(target2)
010004(target3)
Configuring and Managing Zones
Mask Action
ffffff Permit
ffffff Permit
ffffff Permit
000000 Drop
Mask Action
ffffff Permit
ffffff Permit
ffffff Permit
000000 Drop
Mask Action
ffffff Permit
ffffff Permit
ffffff Permit
000000 Drop
Mask Action
ffffff Permit
ffffff Permit
ffffff Permit
000000 Drop
Mask Action
ffffff Permit
ffffff Permit
ffffff Permit