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FTOS Configuration Guide for the C-Series - Force10 Networks

FTOS Configuration Guide for the C-Series - Force10 Networks

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Dynamic Counters<br />

By default, counting <strong>for</strong> <strong>the</strong> following four applications is enabled:<br />

• IPFLOW<br />

• IPACL<br />

• L2ACL<br />

• L2FIB<br />

For remaining applications, <strong>FTOS</strong> automatically turns on counting when <strong>the</strong> application is enabled, and is<br />

turned off when <strong>the</strong> application is disabled. Please note that if more than four counter-dependent<br />

applications are enabled on a port pipe, <strong>the</strong>re is an impact on line rate per<strong>for</strong>mance.<br />

The following counter-dependent applications are supported by <strong>FTOS</strong>:<br />

• Egress VLAN<br />

• Ingress VLAN<br />

• Next Hop 2<br />

• Next Hop 1<br />

• Egress ACLs<br />

• ILM<br />

• IP FLOW<br />

• IP ACL<br />

• IP FIB<br />

• L2 ACL<br />

• L2 FIB<br />

Monitoring and Maintaining Interfaces with TDR<br />

The Time Domain Reflectometer (TDR) is supported on all <strong>Force10</strong> switch/routers. TDR is an assistance<br />

tool to resolve link issues that helps detect obvious open or short conditions within any of <strong>the</strong> four copper<br />

pairs. TDR sends a signal onto <strong>the</strong> physical cable and examines <strong>the</strong> reflection of <strong>the</strong> signal that returns. By<br />

examining <strong>the</strong> reflection, TDR is able to indicate whe<strong>the</strong>r <strong>the</strong>re is a cable fault (when <strong>the</strong> cable is broken,<br />

becomes unterminated, or if a transceiver is unplugged).<br />

TDR is useful <strong>for</strong> troubleshooting an interface that is not establishing a link, that is, when <strong>the</strong> link is<br />

flapping or not coming up. TDR is not intended to be used on an interface that is passing traffic. When a<br />

TDR test is run on a physical cable, it is important to shut down <strong>the</strong> port on <strong>the</strong> far end of <strong>the</strong> cable.<br />

O<strong>the</strong>rwise, it may lead to incorrect test results.<br />

Note: TDR is an intrusive test. Do not run TDR on a link that is up and passing traffic.<br />

<strong>FTOS</strong> <strong>Configuration</strong> <strong>Guide</strong>, version 7.7.1.0 275

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