READ Free Dumps For Cisco- 400-101
| Question ID 18583 | Which command enables L2 QoS support in all VLANs (including the native VLAN)?
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| Option A | switchport priority extend cos
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| Option B | mls qos trust dscp
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| Option C | mls qos rewrite ip dscp
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| Option D | switchport trunk native vlan tag
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| Correct Answer | D |
Explanation Explanation: You can enter the switchport trunk native vlan tag command to enable the tagging of native VLAN traffic on a per-port basis. When tagging is enabled, all the packets on the native VLAN are tagged and all incoming untagged data packets are dropped, but untagged control packets are accepted. When tagging is enabled, it will allow for L2 QoS support in all VLANs, including the native VLAN.
| Question ID 18584 | Which three statements are true about VSS? (Choose three.)
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| Option A | VSS separates the control planes of the active and the standby chassis.
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| Option B | Configuration changes can be made on both active and standby chassis.
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| Option C | When the VSS active chassis recovers after a failure, it initiates a switchover and takes on the active role again.
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| Option D | VSS unifies the control planes of the active and the standby chassis.
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| Option E | HSRP configuration is not required to run VSS.
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| Option F | The VSS standby chassis monitors the VSS active chassis using the VSL.
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| Correct Answer | D,E,F |
Explanation Explanation: VSS operates on a unified control plane with a distributed forwarding architecture in which the active supervisor (or switch) is responsible for actively participating with the rest of the network and for managing and maintaining control plane information. VSS actually removes the need for a next-hop redundancy protocol like HSRP or VRRP. These first-hop redundancy protocols are usually heavily tied to a fast-converging routing protocol like EIGRP, and still require that each device maintain its own control plane. The standby chassis monitors the active chassis using the VSL. If it detects failure, the standby chassis initiates a switchover and takes on the active role. When the failed chassis recovers, it takes on the standby role. Reference: http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/15- 1SY/config_guide/sup2T/15_1_sy_swcg_2T/virtual_switching_systems.pdf