| The Foundation Summary is a collection of information that provides a convenient review of many key concepts in this chapter. If you are already comfortable with the topics in this chapter, this summary could help you recall a few details. If you just read this chapter, this review should help solidify some key facts. If you are doing your final preparation before the exam, this summarized information is a convenient way to review the day before the exam. Table 16-5. Commands for Configuring IP Telephony on a Catalyst SwitchTask | Command Syntax |
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Set power over Ethernet behavior | power inline {auto | never} | Enable QoS globally | mls qos | Define QoS parameter that will be trusted on an interface | mls qos trust {cos | ip-precedence | dscp} | Conditionally trust a Cisco IP Phone | mls qos trust device cisco-phone | Define the trunking on a port to a Cisco IP Phone | switchport voice vlan {vlan-id | dot1p | untagged | none} | Define the trust relationship of the IP Phone | switchport priority extend {cos value | trust} |
You can use the commands in Table 16-6 to verify or troubleshoot IP Telephony on a Catalyst switch. Table 16-6. Commands for Troubleshooting IP Telephony on a Catalyst SwitchTask | Command Syntax |
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Display Power over Ethernet status | show power inline [type mod/num] | Verify the voice VLAN | show interface type mod/num switchport | Display how QoS trust is extended to the phone | show mls qos interface type mod/num |
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