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JN0-663 · Question #54

Click the Exhibit button. [edit] user@PE-1# show protocols rsvp { interface all; } mpls { label-switched-path p1 { from 1.1.1.1; to 4.4.4.4; no-cspf; } interface all; } bgp { group Int { type…

The correct answer is C. Change the route target to match on PE-1 and PE-2. There is a missmatch in target about VRFs.

MPLS Layer 3 VPNs

Question

Click the Exhibit button. [edit] user@PE-1# show protocols rsvp { interface all; } mpls { label-switched-path p1 { from 1.1.1.1; to 4.4.4.4; no-cspf; } interface all; } bgp { group Int { type internal; local-address 1.1.1.1; family inet { unicast; } family inet-vpn { unicast; } neighbor 2.2.2.2; neighbor 3.3.3.3; neighbor 4.4.4.4; } } ospf { area 0.0.0.0 { interface ge-0/0/2.0; interface lo0.0; } } [edit] user@PE-1# show routing-instances CE-1 instance-type vrf; interface ge-0/0/1.0; route-destinguisher 65305:395; vrf-target target:65412:100; routing-options { static { route 100.100.100.0/24 next-hop 192.168.1.100; } } [edit] user@P-1# show protocols rsvp { interface all; } mpls { interface all; } ospf { area 0.0.0.0 { interface ge-0/0/1.0; interface ge-0/0/2.0; interface lo0,0; } } [edit] user@P-2# show protocols rsvp { interface all; } mpls { interface all; } ospf { area 0.0.0.0 { interface ge-0/0/1.0; interface ge-0/0/2.0; interface lo0,0; } } [edit] user@PE-2# show protocols rsvp { interface all; } mpls { label-switched-path p2 { from 4.4.4.4; to 1.1.1.1; no-cspf; } interface all; } bgp { group Int { type internal; local address 4.4.4.4; family inet { unicast; } family inet-vpn { unicast; } neighbor 2.2.2.2; neighbor 3.3.3.3; neighbor 1.1.1.1; } } ospf { area 0.0.0.0 { interface ge-0/0/2.0; interface lo0.0; } } [edit] user@PE2# show routing-instances CE-2 instance-type vrf; interfcae ge-0/0/1.0; route-distinguisher 65305:395; vrf-target target:64512 :100; routing-options { static { route 200.200.200.0/24 next-hop 10.1.1.100; } } Referring to the exhibit, you have configured an L3VPN that connects Site-1 and Site-2 together, but the BGP routes are not showing up on the PE routers. The topology in this scenario is shown below. Site-1 > PE-1 > P-1 > P-2 > PE-2 > Site-2 Which action should you take to allow communication between Site-1 and Site-2?

Options

  • AEnable LDP for all interfaces on all routes.
  • BChange the route distinguisher to be different on PE-1 and PE-2.
  • CChange the route target to match on PE-1 and PE-2.
  • DConfigure BGP on P-1 and P-2.

How the community answered

(54 responses)
  • A
    9% (5)
  • B
    4% (2)
  • C
    70% (38)
  • D
    17% (9)

Explanation

There is a missmatch in target about VRFs.

Topics

#L3VPN#VRF#route-target#VPN configuration

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