Hint
For a trunk link to be established, both ends of the trunk link must be configured to use the same native VLAN. Cisco Discovery Protocol (CDP) will present a native VLAN mismatch error message if the native VLANs do not match. To display the status of the trunk and the native VLAN used on that trunk link, and to verify trunk establishment, you can use the show interface trunk
command in privileged EXEC mode.
Cisco Discovery Protocol (CDP) exchanges hardware and software device information with its directly connected CDP neighbors. Although this is a useful troubleshooting tool, it would not prevent hosts from communicating with each other. Dynamic Trunking Protocol (DTP) is a Cisco proprietary protocol used to manage automatic trunk negotiation. Disabling DTP would create further issues, as the trunk link would be disabled. Disabling RSTP would not prevent hosts from communicating with each other unless there was a loop involved.
For a trunk link to be established, both ends of the trunk link must be configured to use the same native VLAN. Cisco Discovery Protocol (CDP) will present a native VLAN mismatch error message if the native VLANs do not match. To display the status of the trunk and the native VLAN used on that trunk link, and to verify trunk establishment, you can use the show interface trunk
command in privileged EXEC mode.
Cisco Discovery Protocol (CDP) exchanges hardware and software device information with its directly connected CDP neighbors. Although this is a useful troubleshooting tool, it would not prevent hosts from communicating with each other. Dynamic Trunking Protocol (DTP) is a Cisco proprietary protocol used to manage automatic trunk negotiation. Disabling DTP would create further issues, as the trunk link would be disabled. Disabling RSTP would not prevent hosts from communicating with each other unless there was a loop involved.
For a trunk link to be established, both ends of the trunk link must be configured to use the same native VLAN. Cisco Discovery Protocol (CDP) will present a native VLAN mismatch error message if the native VLANs do not match. To display the status of the trunk and the native VLAN used on that trunk link, and to verify trunk establishment, you can use the show interface trunk
command in privileged EXEC mode.
Cisco Discovery Protocol (CDP) exchanges hardware and software device information with its directly connected CDP neighbors. Although this is a useful troubleshooting tool, it would not prevent hosts from communicating with each other. Dynamic Trunking Protocol (DTP) is a Cisco proprietary protocol used to manage automatic trunk negotiation. Disabling DTP would create further issues, as the trunk link would be disabled. Disabling RSTP would not prevent hosts from communicating with each other unless there was a loop involved.