Cisco Nexus 5000 Series NX-OS Software Configuration Guide
Configuring and Managing Zones
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Configuring and Managing Zones

Table Of Contents

Configuring and Managing Zones

Information About Zoning

Zoning Features

Zoning Example

Zone Implementation

Active and Full Zone Set Configuration Guidelines

Configuring Zones

Zone Sets

Activating a Zone Set

About the Default Zone

Configuring the Default Zone Access Permission

About FC Alias Creation

Creating FC Aliases

Creating Zone Sets and Adding Member Zones

Zone Enforcement

Zone Set Distribution

Enabling Full Zone Set Distribution

Enabling a One-Time Distribution

About Recovering from Link Isolation

Importing and Exporting Zone Sets

Zone Set Duplication

Copying Zone Sets

Renaming Zones, Zone Sets, and Aliases

Cloning Zones, Zone Sets, FC Aliases, and Zone Attribute Groups

Clearing the Zone Server Database

Verifying Zone Information

Enhanced Zoning

About Enhanced Zoning

Changing from Basic Zoning to Enhanced Zoning

Changing from Enhanced Zoning to Basic Zoning

Enabling Enhanced Zoning

Modifying the Zone Database

Releasing Zone Database Locks

Merging the Database

Configuring Zone Merge Control Policies

Default Zone Policies

Configuring System Default Zoning Settings

Verifying Enhanced Zone Information

Compacting the Zone Database

Zone and Zone Set Analysis

Default Settings


Configuring and Managing Zones


Zoning enables you to set up access control between storage devices or user groups. If you have administrator privileges in your fabric, you can create zones to increase network security and to prevent data loss or corruption. Zoning is enforced by examining the source-destination ID field.

Advanced zoning capabilities specified in the FC-GS-4 and FC-SW-3 standards are supported. You can use either the existing basic zoning capabilities or the advanced, standards-compliant zoning capabilities.

This chapter includes the following sections:

Information About Zoning

Configuring Zones

Zone Sets

Zone Set Distribution

Zone Set Duplication

Verifying Zone Information

Enhanced Zoning

Compacting the Zone Database

Zone and Zone Set Analysis

Default Settings


Note Table 37-1 lists the differences between zones and VSANs.


Information About Zoning

Zoning is described in the following topics:

Zoning Features

Zoning Example

Zone Implementation

Active and Full Zone Set Configuration Guidelines

Zoning Features

Zoning includes the following features:

A zone consists of multiple zone members.

Members in a zone can access each other; members in different zones cannot access each other.

If zoning is not activated, all devices are members of the default zone.

If zoning is activated, any device that is not in an active zone (a zone that is part of an active zone set) is a member of the default zone.

Zones can vary in size.

Devices can belong to more than one zone.

A physical fabric can have a maximum of 16,000 members. This includes all VSANs in the fabric.

A zone set consists of one or more zones.

A zone set can be activated or deactivated as a single entity across all switches in the fabric.

Only one zone set can be activated at any time.

A zone can be a member of more than one zone set.

A zone switch can have a maximum of 500 zone sets.

Zoning can be administered from any switch in the fabric.

When you activate a zone (from any switch), all switches in the fabric receive the active zone set. Additionally, full zone sets are distributed to all switches in the fabric, if this feature is enabled in the source switch.

If a new switch is added to an existing fabric, zone sets are acquired by the new switch.

Zone changes can be configured nondisruptively.

New zones and zone sets can be activated without interrupting traffic on unaffected ports or devices.

Zone membership can be specified using the following identifiers:

Port world wide name (pWWN)—Specifies the pWWN of an N port attached to the switch as a member of the zone.

Fabric pWWN—Specifies the WWN of the fabric port (switch port's WWN). This membership is also referred to as port-based zoning.

FC ID—Specifies the FC ID of an N port attached to the switch as a member of the zone.

Interface and switch WWN (sWWN)—Specifies the interface of a switch identified by the sWWN. This membership is also referred to as interface-based zoning.

Interface and domain ID—Specifies the interface of a switch identified by the domain ID.

Domain ID and port number—Specifies the domain ID of a Cisco switch domain and additionally specifies a port belonging to a non-Cisco switch.


Note For N ports attached to the switch over a virtual Fibre Channel interface, you can specify zone membership using the pWWN of the N port, the FC ID of the N port, or the fabric pWWN of the virtual Fibre Channel interface.


Default zone membership includes all ports or WWNs that do not have a specific membership association. Access between default zone members is controlled by the default zone policy.

You can configure up to 8000 zones per VSAN and a maximum of 8000 zones for all VSANs on the switch.


Note Interface-based zoning only works with Cisco SAN switches. Interface-based zoning does not work for VSANs configured in interop mode.


Zoning Example

Figure 38-1 shows a zone set with two zones, zone 1 and zone 2, in a fabric. Zone 1 provides access from all three hosts (H1, H2, H3) to the data residing on storage systems S1 and S2. Zone 2 restricts the data on S3 to access only by H3. H3 resides in both zones.

Figure 38-1 Fabric with Two Zones

You can use other ways to partition this fabric into zones. Figure 38-2 shows another possibility. Assume that there is a need to isolate storage system S2 for the purpose of testing new software. To achieve this, zone 3 is configured, which contains only host H2 and storage S2. You can restrict access to only H2 and S2 in zone 3, and to H1 and S1 in zone 1.

Figure 38-2 Fabric with Three Zones

Zone Implementation

Cisco Nexus 5000 Series switches automatically support the following basic zone features (no additional configuration is required):

Zones are contained in a VSAN.

Hard zoning cannot be disabled.

Name server queries are soft-zoned.

Only active zone sets are distributed.

Unzoned devices cannot access each other.

A zone or zone set with the same name can exist in each VSAN.

Each VSAN has a full database and an active database.

Active zone sets cannot be changed, without activating a full zone database.

Active zone sets are preserved across switch reboots.

Changes to the full database must be explicitly saved.

Zone reactivation (a zone set is active and you activate another zone set) does not disrupt existing traffic.

If required, you can additionally configure the following zone features:

Propagate full zone sets to all switches on a per VSAN basis.

Change the default policy for unzoned members.

Interoperate with other vendors by configuring a VSAN in the interop mode. You can also configure one VSAN in the interop mode and another VSAN in the basic mode in the same switch without disrupting each other.

Bring E ports out of isolation.

Active and Full Zone Set Configuration Guidelines

Before configuring a zone set, consider the following guidelines:

Each VSAN can have multiple zone sets but only one zone set can be active at any given time.

When you create a zone set, that zone set becomes a part of the full zone set.

When you activate a zone set, a copy of the zone set from the full zone set is used to enforce zoning, and is called the active zone set. An active zone set cannot be modified. A zone that is part of an active zone set is called an active zone.

The administrator can modify the full zone set even if a zone set with the same name is active. However, the modification will be enforced only upon reactivation.

When the activation is done, the active zone set is automatically stored in persistent configuration. This enables the switch to preserve the active zone set information across switch resets.

All other switches in the fabric receive the active zone set so they can enforce zoning in their respective switches.

Hard and soft zoning are implemented using the active zone set. Modifications take effect during zone set activation.

An FC ID or Nx port that is not part of the active zone set belongs to the default zone and the default zone information is not distributed to other switches.


Note If one zone set is active and you activate another zone set, the currently active zone set is automatically deactivated. You do not need to explicitly deactivate the currently active zone set before activating a new zone set.


Figure 38-3 shows a zone being added to an activated zone set.

Figure 38-3 Active and Full Zone Sets

Configuring Zones

To configure a zone and assign a zone name, perform this task:

 
Command
Purpose

Step 1 

switch# configuration terminal

Enters configuration mode.

Step 2 

switch(config)# zone name zone-name vsan vsan-id

switch(config-zone)#

Configures a zone in the specified VSAN.

Note All alphanumeric characters or one of the following symbols ($, -, ^, _) are supported.

Step 3 

switch(config-zone)# member type value

pWWN example:

switch(config-zone)# member pwwn pwwn-id

Fabric pWWN example:

switch(config-zone)# member fwwn fwwn-id

FC ID example:

switch(config-zone)# member fcid fcid

FC alias example:

switch(config-zone)# member fcalias Payroll

Domain ID example:

switch(config-zone)# member domain-id domain-id portnumber number

Local sWWN interface examples:

switch(config-zone)# member interface type slot/port

Remote sWWN interface example:

switch(config-zone)# member interface type slot/port swwn swwn-id

Domain ID interface example:

switch(config-zone)# member interface fc slot/port domain-id domain-id

Configures a member for the specified zone based on the type (pWWN, fabric pWWN, FC ID, fcalias, domain ID, or interface) and value specified.


Caution You must only configure pWWN-type zoning on all SAN switches running Cisco NX-OS if there is a Cisco MDS 9020 switch running FabricWare in the same fabric.
Tip Use a relevant display command (for example, show interface or show flogi database) to obtain the required value in hex format.


Tip Use the show wwn switch command to retrieve the sWWN. If you do not provide a sWWN, the software automatically uses the local sWWN.


The following example shows how to configure zone members:

switch(config-zone)# member type value

pWWN example:

switch(config-zone)# member pwwn 10:00:00:23:45:67:89:ab

Fabric pWWN example:

switch(config-zone)# member fwwn 10:01:10:01:10:ab:cd:ef

FC ID example:

switch(config-zone)# member fcid 0xce00d1

FC alias example:

switch(config-zone)# member fcalias Payroll

Domain ID example:

switch(config-zone)# member domain-id 2 portnumber 23

Local sWWN interface examples:

switch(config-zone)# member interface fc 2/1

Remote sWWN interface example:

switch(config-zone)# member interface fc2/1 swwn 20:00:00:05:30:00:4a:de

Domain ID interface example:

switch(config-zone)# member interface fc2/1 domain-id 25

Zone Sets

This section describes zone sets and includes the following topics:

Activating a Zone Set

About the Default Zone

Configuring the Default Zone Access Permission

About FC Alias Creation

Creating FC Aliases

Creating Zone Sets and Adding Member Zones

Zone Enforcement

In Figure 38-4, two separate sets are created, each with its own membership hierarchy and zone members.

Figure 38-4 Hierarchy of Zone Sets, Zones, and Zone Members

Zones provide a method for specifying access control, while zone sets are a grouping of zones to enforce access control in the fabric. Either zone set A or zone set B can be activated (but not together).


Tip Zone sets are configured with the names of the member zones and the VSAN (if the zone set is in a configured VSAN).


Activating a Zone Set

Changes to a zone set do not take effect in a full zone set until you activate it.

To activate or deactivate an existing zone set, perform this task:

 
Command
Purpose

Step 1 

switch# configuration terminal

switch(config)#

Enters configuration mode.

Step 2 

switch(config)# zoneset activate name zoneset-name vsan vsan-id

Activates the specified zone set.

switch(config)# no zoneset activate name zoneset-name vsan vsan-id

Deactivates the specified zone set.

About the Default Zone

Each member of a fabric (in effect a device attached to an Nx port) can belong to any zone. If a member is not part of any active zone, it is considered to be part of the default zone. Therefore, if no zone set is active in the fabric, all devices are considered to be in the default zone. Even though a member can belong to multiple zones, a member that is part of the default zone cannot be part of any other zone. The switch determines whether a port is a member of the default zone when the attached port comes up.


Note Unlike configured zones, default zone information is not distributed to the other switches in the fabric.


Traffic can either be permitted or denied among members of the default zone. This information is not distributed to all switches; it must be configured in each switch.


Note When the switch is initialized for the first time, no zones are configured and all members are considered to be part of the default zone. Members are not permitted to communicate with each other.


Configure the default zone policy on each switch in the fabric. If you change the default zone policy on one switch in a fabric, be sure to change it on all the other switches in the fabric.


Note The default settings for default zone configurations can be changed.


The default zone members are explicitly listed when the default policy is configured as permit or when a zone set is active. When the default policy is configured as deny, the members of this zone are not explicitly enumerated when you view the active zone set.

Configuring the Default Zone Access Permission

To permit or deny traffic to members in the default zone, perform this task:

 
Command
Purpose

Step 1 

switch# configuration terminal

Enters configuration mode.

Step 2 

switch(config)# zone default-zone permit vsan vsan-id

Permits traffic flow to default zone members.

switch(config)# no zone default-zone permit vsan vsan-id

Denies (default) traffic flow to default zone members.

About FC Alias Creation

You can assign an alias name and configure an alias member using the following values:

pWWN—The WWN of the N port is in hex format (for example, 10:00:00:23:45:67:89:ab).

fWWN—The WWN of the fabric port name is in hex format (for example, 10:00:00:23:45:67:89:ab).

FC ID—The N port ID is in 0xhhhhhh format (for example, 0xce00d1).

Domain ID—The domain ID is an integer from 1 to 239. A mandatory port number of a non-Cisco switch is required to complete this membership configuration.

Interface—Interface-based zoning is similar to port-based zoning because the switch interface is used to configure the zone. You can specify a switch interface as a zone member for both local and remote switches. To specify a remote switch, enter the remote switch WWN (sWWN) or the domain ID in the particular VSAN.


Tip The switch supports a maximum of 2048 aliases per VSAN.


Creating FC Aliases

To create an alias, perform this task:

 
Command
Purpose

Step 1 

switch# configuration terminal

Enters configuration mode.

Step 2 

switch(config)# fcalias name AliasSample vsan vsan-id

switch(config-fcalias)#

Configures an alias name (AliasSample).

Step 3 

switch(config-fcalias)# member type value

pWWN example:

switch(config-fcalias)# | pwwn pwwn-id

fWWN example:

switch(config-fcalias)# | fwwn fwwn-id

FC ID example:

switch(config-fcalias)# | fcid 0x222222

Domain ID example:

switch(config-fcalias)# | domain-id domain-id portnumber number

Local sWWN interface example:

switch(config-fcalias)# | interface type slot/port

[ swwn | domain-id 25 ]

Configures a member for the specified fcalias (AliasSample) based on the type (pWWN, fabric pWWN, FC ID, domain ID, or interface) and value specified.

Note Multiple members can be specified on multiple lines.

The following example shows how to configure different types of member alias:

switch(config)# fcalias name AliasSample vsan 3
switch(config-fcalias)# member type value 
pWWN example:
switch(config-fcalias)# member pwwn 10:00:00:23:45:67:89:ab
fWWN example:
switch(config-fcalias)# member fwwn 10:01:10:01:10:ab:cd:ef 
FC ID example:
switch(config-fcalias)# member fcid 0x222222 
Domain ID example:
switch(config-fcalias)# member domain-id 2 portnumber 23
Local sWWN interface example:
switch(config-fcalias)# member interface fc2/1
Remote sWWN interface example:
switch(config-fcalias)# member interface fc2/1 swwn 20:00:00:05:30:00:4a:de 
Domain ID interface example:
switch(config-fcalias)# member interface fc2/1 domain-id 25

Creating Zone Sets and Adding Member Zones

To create a zone set to include several zones, perform this task:

 
Command
Purpose

Step 1 

switch# configuration terminal

Enters configuration mode.

Step 2 

switch(config)# zoneset name zoneset-name vsan vsan-id

switch(config-zoneset)#

Configures a zone set called Zoneset1.

Tip To activate a zone set, you must first create the zone and a zone set.

Step 3 

switch(config-zoneset)# member name

Adds Zone1 as a member of the specified zone set (Zoneset1).

Tip If the specified zone name was not previously configured, this command will return a "zone not present" error message:

Step 4 

switch(config-zoneset)# zone name zone-name

switch(config-zoneset-zone)#

Adds a zone to the specified zone set.

Tip Execute this step only if you need to create a zone from a zone set prompt.

Step 5 

switch(config-zoneset-zone)# member fcid fcid

switch(config-zoneset-zone)#

Adds a new member to the new zone.

Tip Execute this step only if you need to add a member to a zone from a zone set prompt.


Tip You do not have to copy the running configuration to the startup configuration to store the active zone set. However, you need to copy the running configuration to the startup configuration to explicitly store full zone sets.



Note Be sure you understand how device alias modes work before enabling them. See Chapter 39 "Distributing Device Alias Services" for details and requirements about device alias modes.


Zone Enforcement

Zoning can be enforced in two ways: soft and hard. Each end device (N port) discovers other devices in the fabric by querying the name server. When a device logs in to the name server, the name server returns the list of other devices that can be accessed by the querying device. If an N port does not know about the FC IDs of other devices outside its zone, it cannot access those devices.

In soft zoning, zoning restrictions are applied only during interaction between the name server and the end device. If an end device somehow knows the FC ID of a device outside its zone, it can access that device.

Hard zoning is enforced by the hardware on each frame sent by an N port. As frames enter the switch, source-destination IDs are compared with permitted combinations to allow the frame at wire speed. Hard zoning is applied to all forms of zoning.


Note Hard zoning enforces zoning restrictions on every frame, and prevents unauthorized access.


Cisco Nexus 5000 Series switches support both hard and soft zoning.

Zone Set Distribution

You can distribute full zone sets using one of two methods: one-time distribution using the zoneset distribute vsan command at the EXEC mode level or full zone set distribution using the zoneset distribute full vsan command at the configuration mode level. Table 38-1 lists the differences between the methods.

Table 38-1 Zone Set Distribution Differences 

One-Time Distribution
zoneset distribute vsan Command
(EXEC Mode)
Full Zone Set Distribution
zoneset distribute full vsan Command
(Configuration Mode)

Distributes the full zone set immediately.

Does not distribute the full zone set immediately.

Does not distribute the full zone set information along with the active zone set during activation, deactivation, or merge process.

Remembers to distribute the full zone set information along with the active zone set during activation, deactivation, and merge processes.


This section describes zone set distribution and includes the following topics:

Enabling Full Zone Set Distribution

Enabling a One-Time Distribution

About Recovering from Link Isolation

Importing and Exporting Zone Sets

Enabling Full Zone Set Distribution

All switches in the Cisco Nexus 5000 Series distribute active zone sets when new E port links come up or when a new zone set is activated in a VSAN. The zone set distribution takes effect while sending merge requests to the adjacent switch or while activating a zone set.

To enable full zone set and active zone set distribution to all switches on a per VSAN basis, perform this task:

 
Command
Purpose

Step 1 

switch# configuration terminal

Enters configuration mode.

Step 2 

switch(config)# zoneset distribute full vsan vsan-id

Enables sending a full zone set along with an active zone set.

Enabling a One-Time Distribution

You can perform a one-time distribution of inactive, unmodified zone sets throughout the fabric.

Use the zoneset distribute vsan vsan-id command in EXEC mode to perform this distribution.

switch# zoneset distribute vsan 2
Zoneset distribution initiated. check zone status
 
   

This command only distributes the full zone set information, as it does not save the information to the startup configuration. You must explicitly enter the copy running-config startup-config command to save the full zone set information to the startup configuration.


Note The one-time distribution of the full zone set is supported in interop 2 and interop 3 modes, and not in interop 1 mode.


Use the show zone status vsan vsan-id command to check the status of the one-time zone set distribution request.

switch# show zone status vsan 3
VSAN: 3 default-zone: permit distribute: active only Interop: 100
    mode:basic merge-control:allow 
    session:none
    hard-zoning:enabled
Default zone:
    qos:none broadcast:disabled ronly:disabled
Full Zoning Database :
    Zonesets:0  Zones:0 Aliases: 0
Active Zoning Database :
    Name: nozoneset  Zonesets:1  Zones:2
Status: Zoneset distribution completed at 04:01:06 Aug 28 2004

About Recovering from Link Isolation

When two switches in a fabric are merged using a TE or E port, these TE and E ports may become isolated when the active zone set databases are different between the two switches or fabrics. When a TE port or an E port become isolated, you can recover that port from its isolated state using one of three options:

Import the neighboring switch's active zone set database and replace the current active zone set (see Figure 38-5).

Export the current database to the neighboring switch.

Manually resolve the conflict by editing the full zone set, activating the corrected zone set, and then bringing up the link.

Figure 38-5 Importing and Exporting the Database

Importing and Exporting Zone Sets

To import or export the zone set information from or to an adjacent switch, perform this task:

 
Command
Purpose

Step 1 

switch# zoneset import interface fc slot/port vsan vsan-id

Imports the zone set from the adjacent switch connected through the specified interface for the VSAN .

switch# zoneset import interface fc slot/port vsan vsan-id

Imports the zone set from the adjacent switch connected through the specified interface for the VSAN range.

Step 2 

switch# zoneset export vsan vsan-id

Exports the zone set to the adjacent switch connected through the specified VSAN.

switch# zoneset export vsan vsan-id

Exports the zone set to the adjacent switch connected through the specified range of VSANs.


Note Perform the import and export operations from a single switch. Importing from one switch and exporting from another switch can lead to isolation again.


Zone Set Duplication

You can make a copy and then edit it without altering the existing active zone set. You can copy an active zone set from the bootflash: directory, volatile: directory, or slot0 to one of the following areas:

To the full zone set

To a remote location (using FTP, SCP, SFTP, or TFTP)

The active zone set is not part of the full zone set. You cannot make changes to an existing zone set and activate it if the full zone set is lost or is not propagated.


Caution Copying an active zone set to a full zone set may overwrite a zone with the same name if it already exists in the full zone set database.

This section includes the following topics:

Copying Zone Sets

Renaming Zones, Zone Sets, and Aliases

Cloning Zones, Zone Sets, FC Aliases, and Zone Attribute Groups

Clearing the Zone Server Database

Copying Zone Sets

On Cisco Nexus 5000 Series switches, you cannot edit an active zone set. However, you can copy an active zone set to create a new zone set that you can edit.

To make a copy of a zone set, perform this task:

 
Command
Purpose

Step 1 

switch# zone copy active-zoneset full-zoneset vsan vsan-id

Please enter yes to proceed.(y/n) [n]? y

Makes a copy of the active zone set in the specified VSAN to the full zone set.

switch# zone copy vsan vsan-id active-zoneset scp://guest@myserver/tmp/active_zoneset.txt

Copies the active zone in the specified VSAN to a remote location using SCP.

Renaming Zones, Zone Sets, and Aliases

To rename a zone, zone set, fcalias, or zone-attribute-group, perform this task:

 
Command
Purpose

Step 1 

switch# configuration terminal

Enters configuration mode.

Step 2 

switch(config)# zoneset rename oldname newname vsan vsan-id

Renames a zone set in the specified VSAN.

switch(config)# zone rename oldname newname vsan vsan-id

Renames a zone in the specified VSAN.

switch(config)# fcalias rename oldname newname vsan vsan-id

Renames a fcalias in the specified VSAN.

switch(config)# zone-attribute-group rename oldname newname vsan vsan-id

Renames a zone attribute group in the specified VSAN.

Step 3 

switch(config)# zoneset activate name newname
vsan
vsan-id

Activates the zone set and updates the new zone name in the active zone set.

Cloning Zones, Zone Sets, FC Aliases, and Zone Attribute Groups

To clone a zone, zone set, fcalias, or zone-attribute-group, perform this task:

 
Command
Purpose

Step 1 

switch# configuration terminal

Enters configuration mode.

Step 2 

switch(config)# zoneset clone oldname newname
vsan vsan-id

Clones a zone set in the specified VSAN.

switch(config)# zone clone oldname newname vsan number

Clones a zone in the specified VSAN.

switch(config)# fcalias clone oldname newname
vsan vsan-id

Clones a fcalias in the specified VSAN.

switch(config)# zone-attribute-group clone oldname newname vsan vsan-id

Clones a zone attribute group in the specified VSAN.

Step 3 

switch(config)# zoneset activate name newname
vsan
vsan-id

Activates the zone set and updates the new zone name in the active zone set.

Clearing the Zone Server Database

You can clear all configured information in the zone server database for the specified VSAN.

To clear the zone server database, use the following command:

switch# clear zone database vsan 2

Note After entering a clear zone database command, you must explicitly enter the copy running-config startup-config to ensure that the running configuration is used when the switch reboots.



Note Clearing a zone set only erases the full zone database, not the active zone database.


Verifying Zone Information

You can view any zone information by using the show command. If you request information for a specific object (for example, a specific zone, zone set, VSAN, or alias, or keywords such as brief or active), only information for the specified object is displayed.

The following example shows how to display zone information for all VSANs:

switch# show zone 
 
   

The following example shows how to display zone information for a specific VSAN:

switch# show zone vsan 1 

The following example shows how to display the configured zone sets for a range of VSANs:

switch# show zoneset vsan 2-3 

The following example shows how to display the members of a specific zone:

switch# show zone name Zone1 
 
   

The following example shows how to display fcalias configuration:

switch# show fcalias vsan 1 

The following example shows how to display all zones to which a member belongs:

switch# show zone member pwwn 21:00:00:20:37:9c:48:e5
 
   

The following example shows how to display the number of control frames exchanged with other switches:

switch# show zone statistics  

The following example shows how to display the active zone set:

switch# show zoneset active 
 
   

The following example shows how to display the active zones:

switch# show zone active 
 
   

The following example shows how to display the zone status:

switch# show zone status
 
   

Enhanced Zoning

The zoning feature complies with the FC-GS-4 and FC-SW-3 standards. Both standards support the basic zoning functionalities explained in the previous section and the enhanced zoning functionalities described in this section.

This section includes the following topics:

About Enhanced Zoning

Changing from Basic Zoning to Enhanced Zoning

Changing from Enhanced Zoning to Basic Zoning

Enabling Enhanced Zoning

Modifying the Zone Database

Releasing Zone Database Locks

Merging the Database

Configuring Zone Merge Control Policies

Default Zone Policies

Configuring System Default Zoning Settings

Verifying Enhanced Zone Information

About Enhanced Zoning

Table 38-2 lists the advantages of the enhanced zoning feature in all switches in the Cisco Nexus 5000 Series.

Table 38-2 Advantages of Enhanced Zoning 

Basic Zoning
Enhanced Zoning
Enhanced Zoning Advantages

Administrators can make simultaneous configuration changes. Upon activation, one administrator can overwrite another administrator's changes.

Performs all configurations within a single configuration session. When you begin a session, the switch locks the entire fabric to implement the change.

One configuration session for the entire fabric to ensure consistency within the fabric.

If a zone is part of multiple zone sets, you create an instance of this zone in each zone set

References to the zone are used by the zone sets as required once you define the zone.

Reduced payload size as the zone is referenced. The size is more pronounced with bigger databases.

The default zone policy is defined per switch. To ensure smooth fabric operation, all switches in the fabric must have the same default zone setting.

Enforces and exchanges the default zone setting throughout the fabric.

Fabric-wide policy enforcement reduces troubleshooting time.

To retrieve the results of the activation on a per switch basis, the managing switch provides a combined status about the activation. It does not identify the failure switch.

Retrieves the activation results and the nature of the problem from each remote switch.

Enhanced error reporting eases the troubleshooting process

To distribute the zoning database, you must reactivate the same zone set. The reactivation may affect hardware changes for hard zoning on the local switch and on remote switches.

Implements changes to the zoning database and distributes it without reactivation.

Distribution of zone sets without activation avoids hardware changes for hard zoning in the switches.

The Cisco-specific zone member types (symbolic node name, and other types) may be used by other non-Cisco switches. During a merge, the Cisco-specific types can be misunderstood by the non-Cisco switches.

Provides a vendor ID along with a vendor-specific type value to uniquely identify a member type.

Unique vendor type.

The fWWN-based zone membership is only supported in Cisco interop mode.

Supports fWWN-based membership in the standard interop mode (interop mode 1).

The fWWN-based member type is standardized.


Changing from Basic Zoning to Enhanced Zoning

To change to the enhanced zoning mode from the basic mode, perform this task:


Step 1 Verify that all switches in the fabric are capable of working in the enhanced mode.

If one or more switches are not capable of working in enhanced mode, then your request to move to enhanced mode is rejected.

Step 2 Set the operation mode to enhanced zoning mode.

You will automatically start a session, acquire a fabric wide lock, distribute the active and full zoning database using the enhanced zoning data structures, distribute zoning policies and then release the lock. All switches in the fabric then move to the enhanced zoning mode.


Tip After moving from basic zoning to enhanced zoning, we recommend that you save the running configuration.



Changing from Enhanced Zoning to Basic Zoning

Cisco SAN switches allow you to change from enhanced zoning to basic zoning to enable you to downgrade and upgrade to other Cisco NX-OS releases.

To change to the basic zoning mode from the enhanced mode, perform this task:


Step 1 Verify that the active and full zone set do not contain any configuration that is specific to the enhanced zoning mode.

If such configurations exist, delete them before proceeding with this procedure. If you do not delete the existing configuration, the switch software automatically removes them.

Step 2 Set the operation mode to basic zoning mode.

You will automatically start a session, acquire a fabric-wide lock, distribute the zoning information using the basic zoning data structure, apply the configuration changes and release the lock from all switches in the fabric. All switches in the fabric then move to basic zoning mode.


Enabling Enhanced Zoning

By default, the enhanced zoning feature is disabled in all switches in the Cisco Nexus 5000 Series.

To enable enhanced zoning in a VSAN, perform this task:

 
Command
Purpose

Step 1 

switch# configuration terminal

switch(config)#

Enters configuration mode.

Step 2 

switch(config)# zone mode enhanced vsan vsan-id

Set zoning mode command initiated. Check zone status

Enables enhanced zoning in the specified VSAN.

switch(config)# no zone mode enhanced vsan vsan-id

Set zoning mode command initiated. Check zone status

Disables enhanced zoning in the specified VSAN.

Modifying the Zone Database

Modifications to the zone database is done within a session. A session is created at the time of the first successful configuration command. On creation of a session, a copy of the zone database is created. Any changes done within the session are performed on this copy of the zoning database. These changes in the copy zoning database are not applied to the effective zoning database until you commit the changes. Once you apply the changes, the session is closed.

If the fabric is locked by another user and for some reason the lock is not cleared, you can force the operation and close the session. You must have permission (role) to clear the lock in this switch and perform the operation on the switch from where the session was originally created.

To commit or discard changes to the zoning database in a VSAN, perform this task:

 
Command
Purpose

Step 1 

switch# configuration terminal

switch(config)#

Enters configuration mode.

Step 2 

switch(config)# zone commit vsan vsan-id

No pending info found

Applies the changes to the enhanced zone database and closes the session.

switch(config)# zone commit vsan vsan-id force

Forcefully applies the changes to the enhanced zone database and closes the session created by another user.

switch(config)# no zone commit vsan vsan-id

Discards the changes to the enhanced zone database and closes the session.

switch(config)# no zone commit vsan vsan-id force

Forcefully discards the changes to the enhanced zone database and closes the session created by another user.

Releasing Zone Database Locks

To release the session lock on the zoning database on the switches in a VSAN, use the no zone commit vsan command from the switch where the database was initially locked.

switch# configuration terminal
switch(config)# no zone commit vsan 2
 
   

If session locks remain on remote switches after using the no zone commit vsan command, you can use the clear zone lock vsan command on the remote switches.

switch# clear zone lock vsan 2
 
   

Note We recommend using the no zone commit vsan command first to release the session lock in the fabric. If that fails, use the clear zone lock vsan command on the remote switches where the session is still locked.


Merging the Database

The merge method depends on the fabric-wide merge control setting:

Restrict—If the two databases are not identical, the ISLs between the switches are isolated.

Allow—The two databases are merged using the merge rules specified in Table 38-3.

Table 38-3 Database Zone Merge Status 

Local Database
Adjacent Database
Merge Status
Results of the Merge

The databases contain zone sets with the same name1 but different zones, aliases, and attributes groups.

Successful.

The union of the local and adjacent databases.

The databases contains a zone, zone alias, or zone attribute group object with same name1 but different members.

Failed.

ISLs are isolated.

Empty.

Contains data.

Successful.

The adjacent database information populates the local database.

Contains data.

Empty.

Successful.

The local database information populates the adjacent database.

1 In the enhanced zoning mode, the active zone set does not have a name in interop mode 1. The zone set names are only present for full zone sets.


The merge process operates as follows:

1. The software compares the protocol versions. If the protocol versions differ, then the ISL is isolated.

2. If the protocol versions are the same, then the zone policies are compared. If the zone policies differ, then the ISL is isolated.

3. If the zone merge options are the same, then the comparison is implemented based on the merge control setting.

a. If the setting is restrict, the active zone set and the full zone set should be identical. Otherwise, the link is isolated.

b. If the setting is allow, then the merge rules are used to perform the merge.

Configuring Zone Merge Control Policies

To configure merge control policies, perform this task:

 
Command
Purpose

Step 1 

switch# configuration terminal

switch(config)#

Enters configuration mode.

Step 2 

switch(config)# zone merge-control restrict vsan vsan-id

Configures a restricted merge control setting for this VSAN.

switch(config)# no zone merge-control restrict vsan vsan-id

Defaults to using the allow merge control setting for this VSAN.

switch(config)# zone commit vsan vsan-id

Commits the changes made to the specified VSAN.

Default Zone Policies

To permit or deny traffic in the default zone, perform this task:

 
Command
Purpose

Step 1 

switch# configuration terminal

Enters configuration mode.

Step 2 

switch(config)# zone default-zone permit vsan vsan-id

Permits traffic flow to default zone members.

switch(config)# no zone default-zone permit vsan vsan-id

Denies traffic flow to default zone members and reverts to factory default.

Step 3 

switch(config)# zone commit vsan vsan-id

Commits the changes made to the specified VSAN.

Configuring System Default Zoning Settings

You can configure default settings for default zone policies and full zone distribution for new VSANs on the switch. To configure switch-wide default settings, perform this task:

 
Command
Purpose

Step 1 

switch# configuration terminal

Enters configuration mode.

Step 2 

switch(config)# system default zone default-zone permit

Configures permit as the default zoning policy for new VSANs on the switch.

switch(config)# no system default zone default-zone permit

Configures deny (default) as the default zoning policy for new VSANs on the switch.

Step 3 

switch(config)# system default zone distribute full

Enables full zone database distribution as the default for new VSANs on the switch.

Step 4 

switch(config)# no system default zone distribute full

Disables (default) full zone database distribution as the default for new VSANs on the switch. Only the active zone database is distributed.


Note Since VSAN 1 is the default VSAN and is always present on the switch, the system default zone commands have no effect on VSAN 1.


Verifying Enhanced Zone Information

The following example shows how to display the zone status for a specified VSAN:

switch# show zone status vsan 2

Compacting the Zone Database

You can delete excess zones and compact the zone database for the VSAN.


Note A merge failure occurs when a switch supports more than 2000 zones per VSAN but its neighbor does not. Also, zone set activation can fail if the switch has more than 2000 zones per VSAN and not all switches in the fabric support more than 2000 zones per VSAN.


To delete zones and compact the zone database for a VSAN, perform this task:

 
Command
Purpose

Step 1 

switch# configuration terminal

switch(config)#

Enters configuration mode.

Step 2 

switch(config)# no zone name zone-name vsan vsan-id

Deletes a zone to reduce the number of zones to 2000 or fewer.

Step 3 

switch(config)# zone compact vsan vsan-id

Compacts the zone database for the specified VSAN to recover the zone ID released when a zone was deleted.

Zone and Zone Set Analysis

To better manage the zones and zone sets on your switch, you can display zone and zone set information using the show zone analysis command.

The following example shows how to display full zoning analysis:

switch# show zone analysis vsan 1
 
   

The following example shows how to display active zoning analysis:

switch# show zone analysis active vsan 1
 
   

See the Cisco Nexus 5000 Series Switch Command Reference for the description of the information displayed in the command output.

Default Settings

Table 38-4 lists the default settings for basic zone parameters.

Table 38-4 Default Basic Zone Parameters 

Parameters
Default

Default zone policy

Denied to all members.

Full zone set distribute

The full zone set(s) is not distributed.

Enhanced zoning

Disabled.