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Disabling the Failover policy, Failback policy

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2 Failback policy Disabling the Failover policy 1. Connect to the switch and log in as admin. 2. Enter the ag command with the --failovershow operand to display the failover setting. switch:admin> ag --failovershow 13 Failover on N_Port 13 is supported 3. Enter the ag --failoverdisable operand to disable failover. switch:admin> ag --failoverdisable 13 Failover policy is disabled for port 13 Failback policy The Failback policy automatically reroutes the F_Ports back to the primary mapped N_Ports as those N_Ports come back online, if the Failback policy is enabled for the N_Port. Only the originally mapped F_Ports fail back. In the case of multiple N_Port failures, only F_Ports that were mapped to the recovered N_Port experience failback. The remaining F_Ports are not redistributed among the online N_Ports during the failback. If the APC policy is enabled, by default, the failback policy is disabled. NOTE The Failback policy is an N_Port parameter. By default, the Failback policy is enabled. The following sequence describes how a failback event occurs: • When an N_Port comes back online, with the Failback policy enabled, the F_Ports that were originally mapped to it are disabled. • The F_Port is rerouted to the primary mapped N_Port, and then re-enabled. • The host establishes a new connection with the fabric. Example: Failback Policy In Example 3, described in Figure 5 on page 17, the Access Gateway N_1 remains disabled because the corresponding F_A1 port is offline. However, N_2 comes back online. See Figure 4 on page 15 for the original fail over scenario. The ports F_1 and F_2 are mapped to N_1 and continue routing to N_3. Ports F_3 and F_4, which were originally mapped to N_2, are disabled and rerouted to N_2, and then enabled. 16 Access Gateway Administrator's Guide 53-1001189-01

Section	Page
About This Document	13
How this document is organized	13
Supported hardware and software	13
What’s new in this document	14
Document conventions	14
Text formatting	14
Command syntax conventions	14
Notes, cautions, and warnings	15
Key terms	15
Notice to the reader	16
Additional information	16
Brocade resources	17
Other industry resources	17
Optional Brocade features	17
Getting technical help	17
Document feedback	18
Getting Started	19
In this chapter	19
Brocade Access Gateway	19
Fabric OS features in Access Gateway mode	20
Access Gateway port types	22
Comparison of Access Gateway ports to standard switch ports	22
How Access Gateway maps ports	23
Access Gateway limitations	24
Upgrade and downgrade considerations for switches in AG mode	24
Advance Device Security policy	25
Automatic Port Configuration policy	25
Port Grouping policy	25
Enabling Policies on Switches in Access Gateway Mode	27
In this chapter	27
Access Gateway policies	27
Showing current policies	27
Advanced Device Security policy	28
Enabling the Advanced Device Security policy	28
Disabling the Advanced Device Security policy	28
Setting which devices can log in if ADS policy is enabled	28
Setting which devices cannot log in if ADS policy is enabled	29
Removing devices from the list of devices allowed at login	29
Adding new devices to the list of devices allowed at login	29
Displaying the list of devices on the switch	30
Automatic Port Configuration policy	30
Enabling the Automatic Port Configuration policy	31
Disabling the Automatic Port Configuration policy	31
Rebalancing F_Ports with APC policy enabled	31
Failover policy	32
Enabling the Failover policy	33
Disabling the Failover policy	34
Failback policy	34
Enabling the Failback policy	35
Cold Failover policy	36
Port Grouping policy	36
Creating a port group	38
Adding an N_Port to a port group	38
Deleting an N_Port from a port group	38
Removing a port group	39
Renaming a port group	39
Disabling the Port Group policy	39
Access Gateway policy enforcement matrix	40
Access Gateway trunking	40
Access Gateway trunking considerations for the Edge switch	41
Trunk group creation	44
Setting up F_Port trunking	44
Assigning a Trunk Area	45
Enabling the DCC policy on trunk	46
Configuration management for trunk areas	46
Enabling Access Gateway trunking	46
Disabling F_Port trunking	48
F_Port Trunking monitoring	48
Access Gateway Cascading	48
Connecting Devices Using Access Gateway	51
In this chapter	51
Connectivity of multiple devices overview	51
Fabric and Edge switch configuration	51
Verifying the switch mode	52
Setting the Fabric OS switch to Native Mode	53
Enabling NPIV on the M-EOS switch	53
Connectivity to Cisco Fabrics	53
Access Gateway routing requirements with Cisco fabrics	54
Enabling NPIV on a Cisco switch	54
Workaround for QLogic-based devices	55
Editing Company ID List if no FC target devices on switch	55
Adding or deleting an OUI from the Company ID List	56
Enabling Flat FCID mode if no FC target devices on switch	57
Editing Company ID list if target devices on switch	57
Access Gateway mode	58
Enabling Access Gateway mode	58
Port States	59
Disabling Access Gateway mode	60
Saving the Access Gateway configuration	60
Rejoining switches to a fabric	61
Reverting to a previous configuration	61
Configuring Ports in Access Gateway mode	63
In this chapter	63
Port Initialization in Access Gateway mode	63
N_Ports	64
Unlocking N_Ports	65
Displaying N_Port configurations	66
Verifying port mapping and status	66
Displaying N_Port mapping	67
Displaying port status	67
Port configurations	68
Adding F_Ports to an N_Port	68
Removing F_Ports from an N_Port	69
Adding a preferred secondary N_Port	70
Deleting F_Ports from a preferred secondary N_Port	70
Troubleshooting	75

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Access Gateway Administrator’s Guide

53-1001189-01

Failback policy

Disabling the Failover policy

Connect to the switch and log in as admin.

Enter the

command with the

failovershow

<n_portnumber>

operand to display the

failover setting.

switch:admin>

ag --failovershow 13

Failover on N_Port 13 is supported

Enter the

failoverdisable

<n_portnumber>

operand to disable failover.

switch:admin>

ag --failoverdisable 13

Failover policy is disabled for port 13

Failback policy

The Failback policy automatically reroutes the F_Ports back to the primary mapped N_Ports as

those N_Ports come back online, if the Failback policy is enabled for the N_Port.

Only the originally mapped F_Ports fail back. In the case of multiple N_Port failures, only F_Ports

that were mapped to the recovered N_Port experience failback. The remaining F_Ports are not

redistributed among the online N_Ports during the failback. If the APC policy is enabled, by default,

the failback policy is disabled.

NOTE

The Failback policy is an N_Port parameter. By default, the Failback policy is enabled.

The following sequence describes how a failback event occurs:

•

When an N_Port comes back online, with the Failback policy enabled, the F_Ports that were

originally mapped to it are disabled.

•

The F_Port is rerouted to the primary mapped N_Port, and then re-enabled.

•

The host establishes a new connection with the fabric.

Example: Failback Policy

In Example 3, described in

Figure 5

on page 17, the Access Gateway N_1 remains disabled

because the corresponding F_A1 port is offline. However, N_2 comes back online. See

Figure 4

page 15 for the original fail over scenario.

The ports F_1 and F_2 are mapped to N_1 and continue routing to N_3. Ports F_3 and F_4, which

were originally mapped to N_2, are disabled and rerouted to N_2, and then enabled.