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HP StorageWorks 8/80 Brocade Access Gateway Administrator's Guide v6.2.0 (53-1 - Page 22

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1 Access Gateway port types Access Gateway port types Access Gateway differs from a typical fabric switch because it is not a switch; instead, it is a mode that you enable on a switch using the ag command. After a switch is set in ag mode, it can connect to the fabric using node ports (N_Ports). Typically fabric switches connect to the Enterprise fabric using ISL (InterSwitch Link) ports, such as E_Ports. Following are the Fibre Channel (FC) ports that AG uses: • F_Port - fabric port that connects a host, HBA, or storage device to a switch in AG mode. • N_Port - node port that connects a switch in AG mode to the F_Port of the fabric switch. Comparison of Access Gateway ports to standard switch ports Access Gateway multiplexes host connections to the fabric. It presents an F_Port to the host and an N_Port to an Edge fabric switch. Using N_Port ID Virtualization (NPIV), AG allows multiple FC initiators to access the SAN on the same physical port. This reduces the hardware requirements and management overhead of hosts to the SAN connections. A fabric switch presents F_Ports (or FL_Ports) and storage devices to the host and presents E_Ports, VE_Ports, or EX_Ports to other switches in the fabric. A fabric switch consumes SAN resources, such as domain IDs, and participates in fabric management and zoning distribution. A fabric switch requires more physical ports than AG to connect the same number of hosts. Figure 2 shows a comparison of the types of ports a switch in AG mode uses to the type of ports that a standard fabric switch uses. Hosts N_Port N_Port Access Gateway Ports Switch in AG mode F_Port F_Port N_Port Edge Switch F_Port NPIV enabled Fabric Hosts N_Port N_Port Fabric Switch Ports Switch in standard default mode Fabric Fabric Switch F_Port E_Port E_Port F_Port E_Port E_Port FIGURE 2 Port usage comparison 4 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

Access Gateway port types

Access Gateway differs from a typical fabric switch because it is not a switch; instead, it is a mode

that you enable on a switch using the

command. After a switch is set in

mode, it can connect

to the fabric using node ports (N_Ports). Typically fabric switches connect to the Enterprise fabric

using ISL (InterSwitch Link) ports, such as E_Ports.

Following are the Fibre Channel (FC) ports that AG uses:

•

F_Port -

fabric port that connects a host, HBA, or storage device to a switch in AG mode.

•

N_Port -

node port that connects a switch in AG mode to the F_Port of the fabric switch.

Comparison of Access Gateway ports to standard switch ports

Access Gateway multiplexes host connections to the fabric. It presents an F_Port to the host and an

N_Port to an Edge fabric switch. Using N_Port ID Virtualization (NPIV), AG allows multiple FC

initiators to access the SAN on the same physical port. This reduces the hardware requirements

and management overhead of hosts to the SAN connections.

A fabric switch presents F_Ports (or FL_Ports) and storage devices to the host and presents

E_Ports, VE_Ports, or EX_Ports to other switches in the fabric. A fabric switch consumes SAN

resources, such as domain IDs, and participates in fabric management and zoning distribution. A

fabric switch requires more physical ports than AG to connect the same number of hosts.

Figure 2

shows a comparison of the types of ports a switch in AG mode uses to the type of ports

that a standard fabric switch uses.

FIGURE 2

Port usage comparison

N_Port

F_Port

N_Port

F_Port

N_Port

F_Port

Hosts

Switch in AG mode

Edge Switch

Fabric

enabled

NPIV

N_Port

F_Port

E_Port

N_Port

F_Port

Hosts

Switch in standard

Fabric Switch

E_Port

Fabric

Access Gateway Ports

Fabric Switch Ports

default mode