nerdexam
Cisco

350-501 · Question #443

Refer to the exhibit. Customer_A asked ISP_A to connect two offices via an MPLS L3 VPN. Customer_A is currently using only the default route toward ISP_A. The engineer at ISP_A already configured…

The correct answer is A. Configure the redistribute static and redistribute connected commands on R1. To complete the MPLS L3 VPN configuration and ensure the 172.16.10.0/24 static route within VRF Customer_A is advertised across the VPN, R1 must be configured to redistribute static routes into its BGP VRF address family.

Services

Question

Refer to the exhibit. Customer_A asked ISP_A to connect two offices via an MPLS L3 VPN. Customer_A is currently using only the default route toward ISP_A. The engineer at ISP_A already configured the ip route vrf Customer_A 172.16.10.0 255.255.255.0 10.10.10.1 command on R1. Which action completes the configuration?

Exhibit

350-501 question #443 exhibit

Options

  • AConfigure the redistribute static and redistribute connected commands on R1.
  • BEnable the bgp default route-target filter and default-information originate commands under the
  • CConfigure the route-target both 200:1 and route-replicate vrf Customer_A commands under the ip
  • DConfigure the network 172.16.10.0 and redistribute-internal static commands under the BGP

How the community answered

(62 responses)
  • A
    76% (47)
  • B
    3% (2)
  • C
    15% (9)
  • D
    6% (4)

Why each option

To complete the MPLS L3 VPN configuration and ensure the `172.16.10.0/24` static route within VRF `Customer_A` is advertised across the VPN, R1 must be configured to redistribute static routes into its BGP VRF address family.

AConfigure the redistribute static and redistribute connected commands on R1.Correct

The `redistribute static` command, configured under the BGP VRF address family on R1, will inject the explicitly defined `ip route vrf Customer_A 172.16.10.0` static route into BGP, allowing it to be propagated to other PE routers across the MPLS VPN. The `redistribute connected` command is also typically included to advertise directly connected subnets within the VRF.

BEnable the bgp default route-target filter and default-information originate commands under the

`default-information originate` advertises a default route, not the specific static route `172.16.10.0/24`. `bgp default route-target filter` controls route target propagation, not route advertisement.

CConfigure the route-target both 200:1 and route-replicate vrf Customer_A commands under the ip

`route-target both 200:1` is part of VRF definition for import/export policies, but does not itself advertise routes. `route-replicate vrf` is not a standard Cisco IOS command for this purpose.

DConfigure the network 172.16.10.0 and redistribute-internal static commands under the BGP

While a `network` command could advertise a directly connected route in the VRF, for a static route, `redistribute static` is the correct mechanism. `redistribute-internal static` is not the correct command syntax; it should simply be `redistribute static`.

Concept tested: MPLS L3 VPN BGP route redistribution (static routes)

Source: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_bgp/configuration/xe-16/irg-xe-16-book/bgp-addr-fam-config.html

Topics

#MPLS L3 VPN#BGP Redistribution#VRF#Static Routing

Community Discussion

No community discussion yet for this question.

Full 350-501 Practice