Place the operational and negotiation events in the exact chronological sequence required for two Cisco Catalyst switches to establish a functional IEEE 802.1Q trunk link using Dynamic Trunking Protocol (DTP) following CLI configuration.
- 1The administrator configures switchport mode dynamic desirable on Switch-A and switchport mode dynamic auto on Switch-B.
- 2Switch-A generates and transmits DTP frames containing its negotiation state and supported trunk encapsulation types across the physical link.
- 3Switch-B receives the DTP frame, processes the desirable request, and responds to negotiate IEEE 802.1Q encapsulation.
- 4Both switch interfaces transition their operational mode to trunking and negotiate the operational encapsulation as IEEE 802.1Q.
- 5The switches begin forwarding traffic, inserting a 4-byte 802.1Q tag into Ethernet frames for non-native VLANs while passing native VLAN frames untagged.
Cevap
The correct sequence begins with the CLI mode configuration on both switches, followed by Switch-A actively sending DTP request frames, Switch-B processing and agreeing to the trunking request, the operational transition of both interfaces to an active 802.1Q trunk, and finally the active forwarding and 4-byte tagging of frame traffic.
The correct order follows the standard Cisco IOS control and data plane progression: Configuration commands activate DTP on the interface -> The dynamic desirable interface actively sends DTP negotiation frames -> The dynamic auto interface receives the frame and agrees to form a trunk -> Both ports transition operationally to trunking status -> IEEE 802.1Q 4-byte frame tagging is applied to active traffic.
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Anahtar Kavram
802.1Q Trunking & DTP Negotiation Sequence