Cisco 300-515 Practice Test - Questions Answers, Page 3
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The CTO of a company requires the support of a network consultant to deliver an MPLS solution without resigning to a certain degree of redundancy and scalability. Which solution effectively scales to hundreds or thousands of sites?
L2VPN with the broadcast traffic processed at the ingress PE.
L3VPN with direct LSP connectivity between all PEs.
L2VPN by encapsulating multiple frame formats with interworking.
L3VPN using a hierarchical topology of N-PEs and U-PEs.
You are troubleshooting ARP connectivity issues for an Ethernet interface on an IOS XR network that runs IS-IS. You verify that the IGP protocol is running, but an ARP entry has not yet been created.
Which action should you take?
debug ping packets
debug ARP
ping the connected neighbor
verify the RIB table routes
Which two are characteristics of using a non-MPLS peer-to-peer model over a traditional overlay model? (Choose two.)
The model is suited for nonredundant configurations.
The configuration on a newly added site PE is updated automatically.
Provider routers know the customer network topology.
The customer specifies the exact site-to-site traffic profile.
Routing information is exchanged between the customer router and one or a few PEs.
While troubleshooting an AToM L2VPN service, a network consultant notices that the AC Layer 2 encapsulations are different. Which action should the consultant take in order to make the MPLS L2VPN work?
tag-rewrite on the ingress and egress PE router
interworking IP configuration on the last PE router before label disposition
nonrouted interworking setup to properly translate only the Layer 2 information from the ACD. interworking IP configuration on both the AC terminations on the PEs
Which mechanism reduces the network flooding caused by host ARP learning behavior?
ARP suppression
storm control
root guard
BPDU guard
What do EVPN single-active and all-active have in common?
They are default gateway redundancy options.
They are multihoming mechanisms used for CE devices.
They are used to provide single connection from a CE device to a service provider.
They are both roles that a designated router can take when MPLS is used with EVPN.
Refer to the exhibit. An engineer is trying to configure an EVPN VWPS. What is the issue with this configuration? A.
The member in the VPWS context should be the PE-facing interface.
The 12vpn evpn command should be instance 101.
Interface GigabitEthernet0/1/0 should not have any IP address.
The service instance and the EVPN instance are different.
Refer to the exhibit. Which result occurs when PE1 learns a new MAC address and all three PEs are enabled with EVPN native?
A system notification is sent to the network administrator that triggers the manual configuration of the new MAC address on PE2 and PE3.
The new MAC address is sent by BGP to PE2 and PE3 as a Type 2 BGP route.
The MAC address is entered into the CAM table and is classified for use on the native VLAN
The MAC address is entered into the CAM table only if it is learned on the native VLAN.
While troubleshooting EoMPLS configuration problems, which three parameters should an engineer match between the two ends of the pseudowire configurations? (Choose three.)
VLAN name
Xconnect group name
EFP subinterface number
pseudowire ID
MTU size
control word usage
A network architect is troubleshooting the L2TPv3 tunneling security due to the untrusted nature of the underlaying network. Which two L2TPv3 features does the architect deploy to address the ongoing issues?
(Choose two.)
TCP MD5 authentication
control message hashing
CHAP authentication
control message rate limiting
asymmetric mutual authentication with PSK
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