300-515 Sample Questions Answers

It configures VPWS multihomed.

It configures VPWS single homed.

It configures an IPv4 peering with 192.168.1.1

It configures MPLS traffic engineering.

the entry of an inconsistent IP address and mask for VRF Selection

an attempt to configure a VRF instance on an interface that already has VRF Selection configured

an attempt to remove a VRF Selection entry that does not exist

an attempt to configure a VRF Selection table that does not exist

IPv4 IP address

source MAC address

destination MAC address

IPv6 hostname

Disable 6PVE that provides local IPv6 reachability over MPLS.

Configure 6PE that provides global IPv6 reachability over IPv4 MPLS

Allow PE routers use the MP-iBGP extensions in the IPv6 network configuration to exchange IPv6 reachability information.

Configure 6PE forwarding between 6PE routers based on the IPv6 header

by converting CE routes into VPNv4 routes and exchanging them using MP-BGP

by establishing BGP neighbor relationships between all connected CEs to exchange routing information

by learning IPv4 routes from connected CEs and redistributing them into the global IGP

by converting CE routes into VPNv4 routes and exchanging them using the global IGP

local and outgoing abels are updated in hardware

BGP is used between neighbors that are exchanging MPLS labels

LDP neighbor statuses

the labels received and advertised on PE1

cluster ID

local preference

origin

originator ID

AS_PATH

show mpls forwarding-table

show mpls ldp neighbors

show mpls ldp labels

show mpls ldp bindings

Activate PE1 as a neighbor under the IPv4 address family.

Configure Router 1 as a route reflector for PE1 under the VPNv4 address family.

Configure PE1 to have an eBGP relationship with Router 1.

Enable BGP default ipv4-unicast

Layer 2 VPNs use IPsec tunneling, but Layer 3 VPNs use L2TPv3 tunneling.

Layer 2 VPNs use AToM, but Layer 3 VPNs use MPLS/BGP.

Layer 2 VPNs use BGP, but Layer 3 VPNs use VPLS.

Layer 2 VPNs use L2TPv3 tunneling, but Layer 3 VPNs use GRE tunneling.

Layer 2 VPNs use IPsec tunneling, but Layer 3 VPNs use pseudowires to provide tunneling.

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.

traceroute

show run

ping

debug

TCP MD5 authentication

control message hashing

CHAP authentication

control message rate limiting

asymmetric mutual authentication with PSK

Devices on the network use MPLS labels to share VPN routes between P routers in the network.

Devices on the network use LSAs to share routes between P routers in the network.

Devices on the network use MPLS labels to move VPN traffic through the network.

Devices on the network use GRE tunnels to move traffic between VRFs.

The CE1 and CE2 VRFs can exchange routes only between their respective VRFs on PE1 and PE2.

All three routers must be running a distance-vector routing protocol.

All three routers must be running MP-BGP.

The CE1 and CE2 VRFs can access the default route provided by the Internet VRF.

Only the CE2 VRF can access the default route provided by the Internet VRF.

RP/0/RP0/CPU0:PE(config-bgp)#

RP/0/RP0/CPU0:PE(config-if)#

RP/0/RP0/CPU0:PE(config-bgp-af)#

RP/0/RP0/CPU0:PE(config-vrf)#

R1 redistributes BGP routes into the OSPF process of VRF custabc as E1 routes.

R1 redistributes BGP routes into the OSPF process of VRF custabc as E2 routes.

R1 mutually redistributes routes between BGP 65001 and the OSPF process of VRF custabc.

R1 redistributes BGP routes into the OSPF process of VRF custabc as OIA routes.