HP StorageWorks 8/80 Brocade Access Gateway Administrator's Guide v6.2.0 (53-1 - Page 40

2 Access Gateway policy enforcement matrix Auto Port Configuration auto Disabled Advance Device Security ADS Disabled Access Gateway policy enforcement matrix The following table shows which combinations of policies can co-exist with each other. TABLE 5 Policy enforcement matrix Policies Auto Port Configuration Port Grouping N_Port Trunking ADS Policy Auto Port Configuration N/A Mutually exclusive Can co-exist Can co-exist N_Port Grouping Mutually exclusive N/A Can co-exist Can co-exist N_Port Trunking Can co-exist Can coexist N/A Can co-exist ADS Policy Can co-exist Can co-exist Can co-exist N/A Access Gateway trunking On switches running in Access Gateway mode, the masterless trunking feature trunks N_Ports because these are the only ports that connect to the Enterprise fabric. After you map or assign F_Ports to an N_Port, the N_Port distributes frames across a set of available path links on the module because these are the only ports that connect the Enterprise fabric to an adjacent Edge switch. To use Access Gateway masterless trunking, all trunking must be configured on the Edge switch. No configuration on the AG module is necessary. Following are the advantages of Access Gateway trunking: • When one or more N_Ports in a trunk group goes offline, there is no change in the PID for the F_Port(s) that were mapped to the N_Port(s) as long as at least one N_Port in the trunk group is active. This provides for a transparent failover and failback within the trunk group. • Trunked links are more efficient because of the trunking algorithm implemented in the switching ASICs that distributes the I/O more evenly across all the links in the trunk group. • Trunk groups cannot span across multiple N_Port groups within an AG module in AG mode. • Multiple trunk groups are allowed within the same N_Port group. NOTE On the Edge switch, this feature is called F_Port trunking or masterless F_Port trunking. Because the entire configuration for AG Trunking is done on the Edge switch, the information here is applicable to the Edge switch module and not the AG module. The only requirements on the AG module is to ensure that the ISL Trunking license is installed. Because you must configure the trunking on the Edge switch, F_Port trunking provides a Trunk group between N_Ports on the AG module and F_Ports on the Edge switch module. This feature keeps AG's F_Port(s) from becoming disabled in the case where an N_Port within the trunk group fails. No failover occurs as long as there is at least one active link in the trunk group. With trunking, any link within a trunk can go off line or become disabled, but the trunk remains fully functional and no re-configuration is required. 22 Access Gateway Administrator's Guide 53-1001189-01