Cisco CX-FEIP-2TX= Installation and con?guration Dokumentacja Strona 212

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5-34
Cisco ONS 15454 Installation and Operations Guide, R3.2
March 2002
Chapter 5 SONET Topologies
Unidirectional Path Switched Rings
Figure 5-27 Using the span shortcut menu to display circuits
Step 3
On the Circuits on Span dialog box (Figure 5-28), select the protection from the Switch all UPSR
circuits away menu:
CLEAR removes a previously-set switch command.
MANUAL switches the span if the new span is error free.
FORCE forces the span to switch, regardless of whether the new span is error free.
LOCKOUT locks out or prevents switching to a highlighted span. (LOCKOUT is only available
when Revertive traffic is enabled.)
Caution FORCE and LOCKOUT commands override normal protective switching mechanisms. Applying
these commands incorrectly can cause traffic outages.
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