Dell Brocade 6510 Fabric OS Administrator's Guide v7.1.0 - Page 351
Illegal configurations with enhanced TI zones
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Enhanced TI zones 12 Illegal configurations with enhanced TI zones When you create TI zones, ensure that all traffic from a port to all destinations on a remote domain have the same path. Do not create separate paths from a local port to two or more ports on the same remote domain. If the TI zones are configured with failover disabled, some traffic will be dropped. If the TI zones are configured with failover enabled, all traffic will go through, but half of the traffic will be routed incorrectly according to the TI zone definitions. A message is sent to the RASlog if a potential error condition is detected in the TI zone configuration. You can also display a report of existing and potential problems with TI zone configurations, as described in "Troubleshooting TI zone routing problems" on page 370. Illegal ETIZ configuration: separate paths from a port to devices on same domain Figure 36 shows two enhanced TI zones that are configured incorrectly because there are two paths from a local port (port 8 on Domain 3) to two or more devices on the same remote domain (ports 1 and 4 on Domain 1). The TI zones are enhanced TI zones because they have an overlapping member (3,8). Each zone describes a different path from the Target to Domain 1. Traffic is routed correctly from Host 1 and Host 2 to the Target; however, traffic from the Target to the Hosts might not be. Traffic from (3,8) destined for Domain 1 cannot go through both port 6 and port 7, so only one port is chosen. If port 6 is chosen, frames destined for (1,4) will be dropped at Domain 1. If port 7 is chosen, frames destined for (1,1) will be dropped. Host 1 Domain 1 1 2 4 3 Domain 3 6 8 7 Target Host 2 = ETIZ 1 = ETIZ 2 FIGURE 36 Illegal ETIZ configuration: two paths from one port to two devices on the same remote domain Illegal ETIZ configuration: separate paths from a single port to the same domain Figure 37 shows another example of an illegal ETIZ configuration. In this example, the two hosts are on separate remote domains, but the path to each host goes through the same domain (Domain 1). This example contains two enhanced TI zones, with port (3,8) as the overlapping member: • ETIZ 1 contains (1,1), (1,2), (3,6), (3,8) • ETIZ 2 contains (2,1), (2,2), (1,4), (1,3), (3,7), (3,8) Fabric OS Administrator's Guide 351 53-1002745-02
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