ISP ASN 65100 provides Internet services to router CE-1 and receives customer prefix 198.18.18.0/24 via eBGP. An administrator for the ISP is now provisioning RTBH services to provide on-demand data-plane security for the customer’s IP space. Which route-map configuration must the administrator apply to router RTBH-1 to complete the implementation of RTBH services to CE-1?

By | December 1, 2022

Refer to the exhibit. ISP ASN 65100 provides Internet services to router CE-1 and receives customer prefix 198.18.18.0/24 via eBGP. An administrator for the ISP is now provisioning RTBH services to provide on-demand data-plane security for the customer’s IP space. Which route-map configuration must the administrator apply to router RTBH-1 to complete the implementation of RTBH services to CE-1?

  • A. route-map RTBH-CUSTOMER-IN permit 10
    description AS65001
    match ip address prefix-list AS65001-PREFIXES
    match community 99
    set local-preference 200
    set community no-export additive
    set ip next-hop 192.168.255.255
    route-map RTBH-CUSTOMER-IN deny 65535
    description DEFAULT DENY
  • B. route-map RTBH-CUSTOMER-IN permit 10
    description AS65001
    match ip address prefix-list AS65001-PREFIXES
    match community 99
    set local-preference 200
    set community local-as additive
    set ip next-hop 192.168.255.255
    route-map RTBH-CUSTOMER-IN deny 65535
    description DEFAULT DENY
  • C. route-map RTBH-CUSTOMER-IN permit 10
    description AS65001
    match ip address prefixlist AS65001-PREFIXES
    match community 99
    set local-preference 200
    set community no-advertise additive
    set ip next-hop local-address
    route-map RTBH-CUSTOMER-IN deny 65535
    description DEFAULT DENY
  • D. route-map RTBH-CUSTOMER-IN permit 10
    description AS65001
    match ip address prefix-list AS65001-PREFIXES
    match community 99
    set local-preference 200
    set community no-advertise additive
    set ip next-hop 192.168.255.255
    route-map RTBH-CUSTOMER-IN deny 65535
    description DEFAULT DENY
Answer: Option A.
Explanation: 

No answer description available for this question

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