642-980 - Troubleshooting Cisco Data Center Unified Fabric (DCUFT)
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Which statement is true regarding FHRP considerations for an OTV network?
Filtering FHRP across the OTV network is recommended to avoid a suboptimal path due to the election of a single default gateway.
Which statement is true regarding how OTV edge devices will react based on the configuration of the VLANs being extended across the overlay network?
Any VLANs not extended will not be populated in the local OTV route table.
You have upgraded your Cisco Nexus 7009 Switches and converted the default VDC to an admin VDC. You notice that all of the ACLs are still present on the admin VDC after the conversion. What should you do?
delete the ACLs
A customer is deploying multihop FCoE in its network. Which guideline must the customer follow with respect to VE ports to make this deployment possible?
VE-port trunking is supported over FCoE-enabled VLANs
Which two commands will show all the OTV edge devices and their MAC addresses in the local site? (Choose two.)
show otv site
show otv adjacency
Which command displays the traffic statistics for a port channel interface?
show port-channel traffic
Which command on a Cisco Nexus 5000 Series Switch will show the interface information for port 10 on the connected FEX 100?
show interface Ethernet 100/1/10
You are no longer seeing updates to the device-aliases database on your Cisco Nexus 5596UP Switch. Which command is useful to determine if the scope of Cisco Fabric Services application distribution was being administratively limited?
N5K2# show cfs region
Your customer has a dual Cisco Nexus 7010 Switches in its data center. Customer's representatives want to know how to determine if Cisco IOS ISSU is possible on the switches as they are upgrading to version 6.0.4. Which command is useful to determine if the upgrade will be non-disruptive?
N7010-C1# install all
In order to fulfill the requirement to prevent the creation of end-to-end loops across a multihomed OTV network that connects two different data centers, what is the solution to this problem?
enable AED on a per-VLAN basis between each OTV edge device with the same site ID
Which two describe the correct requirements for non-disruptive IOS ISSU on Cisco Nexus 7000 Series Switches? (Choose two.)
low version skew
A customer is deploying FCoE in its networ and has found that the connected host does not support FIP. Which command will be useful in troubleshooting this issue?
show platform software fcoe_mgr info interface vfc id
A customer reports that a 10-Gb interface between a Cisco Nexus 7009 Switch and a Cisco Nexus 5548UP Switch is not passing traffic. The Nexus 7009 interface indicates up/up. The Nexus 5548UP interface indicates up/down. Which feature should you enable to help isolate the root cause?
FHRP isolation between data center networks that are connected over an OTV network is a two-step process; the first prevents FHRP peering by filtering FHRP control packets across the overlay via a VLAN ACL. What is the second step?
Filter the FHRP MAC addresses that are being advertised by IS-IS.
Which command would you use to check the status of your configuration synchronization peer?
N5K2# show switch-profile peer
When a directly connected host pings a switch virtual interface on the Cisco Nexus 7000 Series Switch, there is intermittent ping loss. What is the cause?
CoPP is rate-limiting all ICMP traffic that is destined to the CPU.
Which two commands can you issue on a Cisco Nexus 5548UP Switch to determine which interfaces are connected to fabric extenders? (Choose two.)
show fex fex-id
show fex detail
Which command is critical in order for OTV edge devices to maintain an overlay adjacency with their local peers in a multihomed site via the join interfaces across the Layer 3 network domain?
Which two commands will show all the OTV edge devices and their MAC addresses in all sites in the overlay? (Choose two.)
show otv adjacency overlay
show otv adjacency
Which command is used to check for potential vPC configuration consistency problems?
show vpc consistency-parameters global
When using a Cisco Nexus 5500 and Cisco Nexus 7000 Series Switch, how can a port channel interface be configured?
Layer 3 interface
On the secondary vPC switch, under which circumstance does the vPC autorecovery feature not bring up the vPC member ports?
Peer link is up, and the peer-keepalive link fails.
In Cisco NX-OS releases prior to 5.2, how should the copp-system-p-policy policy be modified to change how the supervisor module is protected from DoS attacks?
Re-run the setup utility and apply a new CoPP profile.
Refer to the output. feature otv otv site-vlan 2 otv site-identifier 256 ! interface ethernet 2/0 ip address 192.0.2.1/24 ip igmp version 3 ! interface ethernet 2/1 ip address 192.0.2.2/24 ip igmp version 3 ! interface Overlay1 otv control-group 188.8.131.52 otv join-interface ethernet 2/0 otv extend-vlan 3-100 ! interface Overlay2 otv control-group 184.108.40.206 otv join-interface ethernet 2/1 otv extend-vlan 101-115 Which command best represents where the control plane configurations are applied?
switch(config-if-overlay)# otv isis hello-interval 30
Which statement is true regarding STP?
When the spanning-tree topology is calculated based on default parameters, the path between the source and destination end stations in a switched network might not be ideal.
There is an ARP storm in VDC 1. Some users on VDC 2 notice that ARP is not resolving for their gateway on the Cisco Nexus core. What is the cause?
The ARP CoPP class committed information rate is exceeded, resulting in ARP loss in all VDCs.
Your customer is an ISP providing service to thousands of end customers. Its main concerns are focused on using up the total number of 4096 VLANs per VDC, wasting an unused block of IP addresses, and IP address management. Which technique will address these concerns?
use PVLANs, which will solve the scalability problem and provide IP address management
A customer calls you to report that it receives an error when entering the pinning max-links 4 command in FEX configuration mode on its Cisco Nexus 5596T Switch. Which of these is a likely cause for this condition?
A fabric interface is in a port channel.
Which CLI command can tell which switch is on the other side of port channel 2 that is trunking VSAN 5?
show topology vsan 5
What is one requirement for running FabricPath on a Cisco Nexus 7000 Series switches?
You must have an F Series module
What is the correct configuration for interface Ethernet 1/1 of a Cisco Nexus 5000 Series Switch when it is a member of port channel 101 connected to FEX 101?
interface Ethernet1/1 switchport mode fex-fabric fex associate 101 channel-group 101
Which statement would explain why the overlay interface on an OTV edge device is not in the up state?
Multicast groups are not mapped to a range of SSM addresses to carry the multicast traffic.
Which statement is true regarding LACP configuration?
With LACP, you can bundle up to 16 interfaces in a channel group
You receive an error attempting to enable the vPC feature on a Cisco Nexus 7018 Switch. Which Cisco Fabric Services distribution must be operational before the feature can be enabled?
A customer reports that it cannot establish a vPC peer link between two Cisco Nexus 5548UP Switches. The interfaces on both switches are configured and cabled correctly. The interface status is up/down on switch 1 and up/up on switch 2. Which three steps are taken to isolate the root cause? (Choose three.)
swap the fiber-optic cable with one known to be good
swap the transceivers between the two interfaces
swap the ends of the fiber-optic cable
Which command would you use to find the AED of an extended VLAN in a dual-homed site of an OTV network?
show otv vlan on the AED
In a Cisco Data center network, what troubleshooting step would you do first when having a npv issue?
Check to see if npv is enable
Which statement is true regarding Cisco FabricPath?
It is necessary to first install the Cisco FabricPath feature set in the default VDC
You have enabled configuration synchronization between two Cisco Nexus 5548UP Switches. You create a port channel on switch 1 and determine that it was not synchronized with its peer. The peer switch can be pinged on the management VRF. When you check your peer status, you receive a "peer not reachable" message in the command output. What is the explanation for this?
CFSoIP is disabled.
A customer is troubleshooting FCoE in its network. They have discovered that vFC is currently down and there is no active STP port state on the bound Ethernet interface. What should the STP port state be to correct this issue?
The bound interface should be in an STP forwarding state for both the native VLAN and the member FCoE VLAN that is mapped to the active VSAN.