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21 Cards in this Set
- Front
- Back
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What are the two kinds of trunking protocols that Cisco switches support?
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802.1Q and ISL
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What protocol was created by Cisco to assist with trunk creation?
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Dynamic Trunk Protocol (DTP)
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What are the different DTP modes?
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On
Off Desirable Auto Nonegotiate |
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How is the DTP mode 'on' configured?
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router(config-if)# switchport mode trunk
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What does the DTP mode 'on' do?
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Forces the interface to trunk and sends DTP frames.
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How is the DTP mode 'off' configured?
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router(config-if)# switchport mode access
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What does the DTP mode 'off' do?
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Forces the interface to access mode.
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How is the DTP mode 'desirable' configured?
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router(config-if)# switchport mode dynamic desirable
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What does the DTP mode 'desirable' do?
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Makes the port willing to trunk and sends DTP frames.
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How is the DTP mode 'auto' configured?
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router(config-if)# switchport mode dynamic auto
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What does the DTP mode 'auto' do?
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Makes the port willing to trunk, but does NOT send DTP frames.
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How is the DTP mode 'nonegotiate' configured?
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router(config-if)# switchport nonegotiate
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What does the DTP mode 'nonegotiate' do?
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Used with the ON mode, it stops DTP frames from being sent on the port.
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What command displays trunk port details on a switch?
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show interface trunk
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What is VTP?
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VLAN Trunking Protocol
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What does VTP do?
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Exchanges VLAN database information between switches
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What are the different VTP modes?
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Server
Client Transparent |
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How does the VTP Server mode work?
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Default mode, can create/change VLANs on the switch
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How does the VTP Client mode work?
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Learns VLAN database from the Server. Cannot modify VLANs on the switch.
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How does the VTP Transparent mode work?
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Ignores, but forwards VTP messages. Independent VLAN database kept on switch.
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What are some reasons a switch would not hear VTP advertisements?
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Wrong domain name (case sensitive)
Wrong password set No trunk exists Wrong mode set (transparent) |
