[Free] 2017(Nov) Dumps4cert Testinsides Cisco 300-165 Dumps with VCE and PDF Download 31-40

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Implementing Cisco Data Center Infrastructure

Question No: 31 – (Topic 3)

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Dumps4Cert 2017 PDF and VCE

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Customer has configured fabricpath allocate-delay to 600. What is the effect of this?

  1. The allocate-delay is the time for FP to go into forwarding state

  2. It specifies the time delay for a transitioned value to be propagated throughout the network

  3. It specifies the time delay for a link bringup to detect conflicts

  4. The allocate-delay is the time delay for a new resource to be propagated throughout the network

Answer: D Explanation:

Specifies the time delay for a new resource to be propagated throughout the network. Reference: http://www.cisco.com/web/techdoc/dc/reference/cli/nxos/commands/fpath/fabricpath_timers

.html

Question No: 32 – (Topic 3)

Which topology is not supported when using vPC?

  1. a single-homed server to a single FEX that is connected to two Cisco Nexus 5500 Series Switches

  2. a dual-homed server to two FEXs, each connected to two Cisco Nexus 5500 Series Switches

  3. a dual-homed server to two FEXs that are connected to one Cisco Nexus 5500 Series Switch

  4. a dual-homed server to a single FEX that is connected to two Cisco Nexus 5500 Series Switches

Answer: C Explanation:

The figure shows unsupported topology where a vPC is between hosts and two FEXs that are connected to one Cisco Nexus 5500 Series device. This topology does not provide a good high availability solution because the server loses the connectivity to the network when the Cisco Nexus 5000 Series device fails.

Figure: Unsupported Topology-Host vPC With One Cisco Nexus 5000 Series Device

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If you need to connect a multi-homing server to a pair of FEXs when there is only one Cisco Nexus 5000 Series device, you have the option to run active or standby NIC teaming from the server.

Reference: http://www.cisco.com/en/US/docs/switches/datacenter/nexus5000/sw/mkt_ops_guides/513

_n1_1/n5k_enhanced_vpc.html

Question No: 33 – (Topic 3)

Refer to the exhibit.

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Which three statements about the Cisco Nexus 7000 switch are true? (Choose three.)

  1. An emulated switch ID must be unique when the vPC feature is used.

  2. Switches with FabricPath and vPC consume two switch IDs.

  3. Emulated switch IDs must be numbered from 1 to 99.

  4. Each switch ID must be unique in the FabricPath topology.

  5. Switch IDs must be configured manually.

Answer: B,D,E Explanation:

To understand this feature, please refer to the link given below.

Reference: http://www.cisco.com/c/en/us/products/collateral/switches/nexus-5000-series- switches/guide_c07-690079.html#wp9000065

Question No: 34 – (Topic 3)

Refer to the exhibit.

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Which corrective action is taken to resolve the problem?

  1. Trunk four VLANs on interface ethernet 199/1/1.

  2. Use the shut and no shut interface ethernet 199/1/1so that the VLANs come up.

  3. Place interface ethernet 199/1/1 in VLAN 4 in the N5K-2 configuration.

  4. Prune all but four VLANs from vPC 199.

  5. Add VLAN 4 to vPC 199.

Answer: C Explanation:

Place interface ethernet 199/1/1 in VLAN 4 in the N5K-2 configuration.

Question No: 35 – (Topic 3)

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Dumps4Cert 2017 PDF and VCE

Dumps4Cert 2017 PDF and VCE

Dumps4Cert 2017 PDF and VCE

On a Cisco Nexus7000 switches what is true regarding Cisco FabricPath requirements?

  1. Ensure that you have installed the Enhanced Layer 2 license and that you have installed an F Series module

  2. Ensure that you have installed the Enhanced Layer 2 license and that you have installed an M Series module

  3. Ensure that you have installed the Enhanced Layer 3 license and that you have installed an M Series module

  4. Ensure that you have installed the Scalable Feature License license and that you have installed an F Series module

Answer: A Explanation:

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Question No: 36 – (Topic 3)

FabricPath switching has the following prerequisites:

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鈥?/p>

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You should have a working knowledge of Classical Ethernet Layer 2 functioning.

鈥?/p>

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Dumps4Cert 2017 PDF and VCE

You must install the FabricPath feature set on the default and nondefault VDC before you enable FabricPath on the switch. See Configuring Feature Set for FabricPath for information on installing the FabricPath feature set.

鈥?/p>

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You are logged onto the device.

鈥?/p>

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Ensure that you have installed the Enhanced Layer 2 license.

鈥?/p>

You are in the correct virtual device context (VDC). A VDC is a logical representation of a set of system resources. You can use the switchto vdc command with a VDC number.

鈥?/p>

You are working on the F Series module.

Reference: http://www.cisco.com/en/US/docs/switches/datacenter/sw/5_x/nx- oQsu/feasbtriicopnaNtho/c:o3n6figur(aTtoiopnic/g3u)ide/fp_switching.html

Which function does the graceful restart feature allow a Cisco Nexus 7000 Series router to perform?

A. Perform a rapid route convergence.

Answer: C Explanation:

Graceful Restart and Non Stop Routing both allow for the forwarding of data packets to continue along known routes while the routing protocol information is being restored (in the case of Graceful Restart) or refreshed (in the case of Non Stop Routing) following a processor switchover. When Graceful Restart is used, peer networking devices are informed, via protocol extensions prior to the event, of the SSO capable routers ability to perform graceful restart. The peer device must have the ability to understand this messaging. When a switchover occurs, the peer will continue to forward to the switching over router as instructed by the GR process for each particular protocol, even though in most cases the peering relationship needs to be rebuilt. Essentially, the peer router will give the switching over router a quot;gracequot; period to re-establish the neighbor relationship, while continuing to forward to the routes from that peer.

Reference: http://www.cisco.com/c/en/us/products/collateral/ios-nx-os-software/high- availability/solution_overview_c22-487228.html

Question No: 37 – (Topic 3)

A Cisco Nexus 2000 Series Fabric Extender is connected to two Cisco Nexus 5000 Series switches via a vPC link. After both Cisco Nexus 5000 Series switches lose power, only one switch is able to power back up. At this time, the Cisco Nexus 2000 Series Fabric Extender is not active and the vPC ports are unavailable to the network.

Which action will get the Cisco Nexus 2000 Series Fabric Extender active when only one Cisco Nexus 5000 Series switch is up and active?

  1. Move the line from the failed Cisco Nexus 5000 Series switch to the switch that is powered on, so the port channel forms automatically on the switch that is powered on.

  2. Shut down the peer link on the Cisco Nexus 5000 Series switch that is powered on.

  3. Configure reload restore or auto-recovery reload-delay on the Cisco Nexus 5000 Series switch that is powered on.

  4. Power off and on the Cisco Nexus 2000 Series Fabric Extender so that it can detect only one Cisco Nexus 5000 Series switch at power up.

Answer: C Explanation:

The vPC consistency check message is sent by the vPC peer link. The vPC consistency

check cannot be performed when the peer link is lost. When the vPC peer link is lost, the operational secondary switch suspends all of its vPC member ports while the vPC member ports remain on the operational primary switch. If the vPC member ports on the primary switch flaps afterwards (for example, when the switch or server that connects to the vPC primary switch is reloaded), the ports remain down due to the vPC consistency check and you cannot add or bring up more vPCs.

Beginning with Cisco NX-OS Release 5.0(2)N2(1), the auto-recovery feature brings up the vPC links when one peer is down. This feature performs two operations:

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鈥?/p>

Dumps4Cert 2017 PDF and VCE

If both switches reload, and only one switch boots up, auto-recovery allows that switch to assume the role of the primary switch. The vPC links come up after a configurable period of time if the vPC peer-link and the peer-keepalive fail to become operational within that time. If the peer-link comes up but the peer-keepalive does not come up, both peer switches keep the vPC links down. This feature is similar to the reload restore feature in Cisco NX- OS Release 5.0(2)N1(1) and earlier releases. The reload delay period can range from 240 to 3600 seconds.

鈥?/p>

When you disable vPCs on a secondary vPC switch because of a peer-link failure and then the primary vPC switch fails, the secondary switch reenables the vPCs. In this scenario, the vPC waits for three consecutive keepalive failures before recovering the vPC links.

Reference: http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/operations/n5k_v pc_ops.html

Question No: 38 – (Topic 3)

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Dumps4Cert 2017 PDF and VCE

Dumps4Cert 2017 PDF and VCE

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FabricPath switch-id is 25 and load-balance is configured for L3/L4 and rotate amount is 14 byte. What information is true about FabricPath switch-id?

  1. FabricPath topology requires manual configuration of switch-id which has a range from 1 to 4095

  2. Every FabricPath must have a manually configured switch-id for it to form a FabricPath topology

  3. FabricPath topology requires manual configuration of switch-id which has a range from 1 to 4099

  4. You do not have to manually assign a switch ID unless you are running a virtual port channel plus (vPC ) because the system assigns a switch ID for you when you enable FabricPath

Answer: D Explanation:

fabricpath switch-id (vPC)

To configure a virtual port channel plus (vPC ) switch ID, use the fabricpath switch-id command. To remove the FabricPath switch from a vPC domain, use the no form of this command.

fabricpath switch-id switch-id

no fabricpath switch-id [ switch-id ]

Usage Guidelines

You do not have to manually assign a switch ID (unless you are running a vPC ); the system assigns a switch ID for you when you enable FabricPath.

Note You must assign the same vPC switch ID to each of the two vPC peer devices before they can form an adjacency.

This command requires an Enhanced Layer 2 license.

Examples

This example shows how to configure a vPC switch ID on a FabricPath-enabled device: switch# configure terminal

switch(config)# vpc domain 1

switch(config-vpc-domain)# fabricpath switch-id 1

Configuring fabricpath switch id will flap vPCs. Continue (yes/no)? [no]

Question No: 39 – (Topic 3)

Refer to the exhibit.

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What is the consequence of configuring peer-gateway on the two vPC peers N7K-1 and N7K-2?

  1. Nothing, this is the standard vPC configuration to make the feature work.

  2. The downstream device detects only one of the vPC peers as its gateway.

  3. The downstream device can use DMAC of N7K-1 on the link to N7K-2, and N7K-2

    forwards the packet.

  4. This configuration enables the downstream device to use DHCP to obtain its default gateway.

Answer: C Explanation:

Beginning with Cisco NX-OS 4.2(1), you can configure vPC peer devices to act as the gateway even for packets that are destined to the vPC peer device#39;s MAC address. Use the peer-gateway command to configure this feature.

Some network-attached storage (NAS) devices or load-balancers may have features aimed to optimize the performances of particular applications. Essentially these features avoid performing a routing-table lookup when responding to a request that originated form a host not locally attached to the same subnet. Such devices may reply to traffic using the MAC address of the sender Cisco Nexus 7000 device rather than the common HSRP gateway.

Such behavior is non-complaint with some basic Ethernet RFC standards. Packets reaching a vPC device for the non-local router MAC address are sent across the peer-link and could be dropped by the built in vPC loop avoidance mechanism if the final destination is behind another vPC.

The vPC peer-gateway capability allows a vPC switch to act as the active gateway for packets that are addressed to the router MAC address of the vPC peer. This feature enables local forwarding of such packets without the need to cross the vPC peer-link. In this scenario, the feature optimizes use of the peer-link and avoids potential traffic loss. Configuring the peer-gateway feature needs to be done on both primary and secondary vPC peers and is non-disruptive to the operations of the device or to the vPC traffic. The vPC peer-gateway feature can be configured globally under the vPC domain submode. When enabling this feature it is also required to disable IP redirects on all interface VLANs mapped over a vPC VLAN to avoid generation of IP redirect messages for packets switched through the peer gateway router. When the feature is enabled in the vPC domain, the user is notified of such a requirement through an appropriate message.

Packets arriving at the peer-gateway vPC device will have their TTL decremented, so packets carrying TTL = 1 may be dropped in transit due to TTL expire. This needs to be taken into account when the peer-gateway feature is enabled and particular network protocols sourcing packets with TTL = 1 operate on a vPC VLAN.

Reference: http://www.cisco.com/c/en/us/td/docs/switches/datacenter/sw/4_2/nx- os/interfaces/configuration/guide/if_nxos/if_vPC.html

Question No: 40 – (Topic 3)

Which two types of traffic are carried over a vPC peer link when no failure scenarios are present? (Choose two.)

  1. multicast data traffic

  2. unicast data traffic

  3. broadcast data traffic

  4. vPC keep-alive messages

Answer: A,C Explanation:

The vPC peer link is the link used to synchronize states between the vPC peer devices. The vPC peer link carries control traffic between two vPC switches and also multicast, broadcast data traffic. In some link failure scenarios, it also carries unicast traffic. You should have at least two 10 Gigabit Ethernet interfaces for peer links.

Reference: http://www.cisco.com/c/en/us/products/collateral/switches/nexus-5000-series- switches/configuration_guide_c07-543563.html

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