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HPE7-A06 · Question #15

Refer to the exhibit. Company XYZ is using AOS-CX on Agg-1 and Agg-2. Both routers already have established eBGP connections as shown in the diagram but XYZ engineers are concerned that they could…

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Implementing Complex Campus Access Switching

Question

Refer to the exhibit. Company XYZ is using AOS-CX on Agg-1 and Agg-2. Both routers already have established eBGP connections as shown in the diagram but XYZ engineers are concerned that they could become a transit AS for other ISPs. XYZ engineers have proposed the following configuration changes on both Agg-1 and Agg-2:

Which script below will complement the configuration shown while avoiding XYZ becoming a transit AS? A. B. C. D.

Exhibits

HPE7-A06 question #15 exhibit 1
HPE7-A06 question #15 exhibit 2
HPE7-A06 question #15 exhibit 3

Options

  • Aip aspath-list bgp-local permit ^64500$ route-map bgp-ebgp-out permit match aspath bgp-local exit
  • Bip aspath-list bgp-local permit ^64500$ route-map bgp-ebgp-out deny match aspath bgp-local exit router bgp 64500 address-family ipv4 unicast neighbor <ip of ebgp-neighbor> route-map bgp-ebgp-out both exit
  • Cip aspath-list bgp-local permit ^$ route-map bgp-ebgp-out permit match aspath bgp-local exit
  • Dip aspath-list bgp-local permit ^$ route-map bgp-ebgp-out deny match aspath bgp-local exit

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Topics

#BGP#transit AS#route filtering#eBGP policy
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