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Fabric OS Administrator’s Guide 351
53-1002745-02
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.
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)
7
3
Domain 1 Domain 3
Host 1
1
6
4
= ETIZ 1
2
8
Host 2
Target
= ETIZ 2