we use local-pref on inbound routes to influence outbound traffic

I REALLY think the answer is B. I may be reading too much into this, but here's my take. This is the Service Provider exam, so in my opinion we need to treat this as being the service provider, and therefore, we need to see it as changes that must be made on our equipment. Service providers generally don't make changes like this for one customer, but they do have BGP policy lists that customers can use to put community tags on their prefixes, which will cause policies on the service provider to be triggered. By using community tags from the customer and community lists from us (the service provider), the path can be manipulated with a route-map that adjusts the local preference of how to reach the customer's site. So I think B is the best answer.

answer must be A : Read the question carefully: A customer of an ISP (assume AS1)/.....and at last preferred points for the customer AS.....there are 2 separate AS, so MED will come into picture.....thus A will be ans

Yes, we do the same thing here. So it has to be Answer D.

It's pretty clear the configuration is on the customer side (it says 'the customer asks ISP for support'). Why would an ISP even care which link it sends traffic to a customer on? If a multihomed customer wants one link preferred over the other for incoming traffic, he will configure the policy, not the ISP. But in this case, the question is about outgoing traffic, so the answer is D.

It's pretty clear the configuration is on the customer side (it says 'the customer asks ISP for support'). Why would an ISP even care which link it sends traffic to a customer on? If a multihomed customer wants one link preferred over the other for incoming traffic, he will configure the policy, not the ISP. But in this case, the question is about outgoing traffic, so the answer is D.

Local Pref. is not exchanged in E-BGP update, so SP cannot affect the customer choice by setting outbound LP.

Also, MED do not fit the description. The default behavior of MED is to only compare if the AS is the same for the path. One would expect a multihoming scenario in the question then. And MED is also 6 in path selection. Highest local pref to inbound is the answer.

Although Cisco is horrible at writing questions and I wouldn't put it past them to make you guess your role in the situation... Local pref does not work like that.

The question was not copied correctly. it should be Which BGP attribute should be configured to choose specific BGP speakers as preferred exit points for the customer AS?

I'd go with A simply because this is from a service provider angle; you can only influence metrics toward the customer to affect his outbound traffic toward you, not local pref

Selected Answer: D A higher local preference on routes INBOUND makes them preferred OUTBOUND

I think in the end it depends on whether it's iBGP or eBGP. if it is eBGP then the answer is A but if it's iBGP then the answer is B theres not enough information here. Customer gets a IP from the ISP, so the ISP to the client is iBGP because it's internal to the AS. It would be different if the guest had two ISP connections, or the ISP had to go through another external route to reach the customer, I dont think that Cisco made it this complicated, I have to go with B since it's more simple. Again its iBGP versus eBGP there's not enough information therefore I go with simplicity.

Ok, not sure how many of you have worked for an ISP before but I have. The question is about you helping your customer. So the configuration will be what they are doing in their network, which takes MED out of the equation since that's something the ISP would do to influence their outbound traffic. Local Pref is how you influence the way you route outbound for the entire AS domain. However, the policy is applied to the routes you learn, which means as the route comes INBOUND you use a matching clause and set the local pref. The correct answer is Local Pref inbound FOR THE CUSTOMER, which is who you are helping.

Thinking about it a bit more, the question may also mean that an ISP customer asks support from the ISP to make the change on the ISP side. In this case the answer is A. Cisco style stupid questions...

it's none of the above guys, you're all incorrect

It is not stated that the customer asks the ISP for support. Outbound refers to outbound traffic, not BGP advertisements. Local preference applies to incoming routes, influencing outbound traffic. https://community.cisco.com/t5/other-network-architecture/bgp-inbound-and-outbound-traffic/td-p/337728 Answer is B

Sorry for my previous comment. Although in Cisco documentation the inbound and outbound terms are only used to describe traffic flow, I think in this case it is about the direction of the routes on which the attribute is set. The final answer is D.

I’d say D too; the customer could send a community to trigger a policy/route map on the isp side, but it would still be for inbound LP.

D - you have to set the local-pref HIGHER for routes coming INTO the AS to make the AS prefer that exit point

Could the question be worded any worse? here cisco is checking whether you understood the question rather than the content of the question itself, which is what the exam should focus on

Selected Answer: B The traffic we want to influence here is the one we are forwarding OUT to other BGP speakes (BGP peers). Option B then.

Selected Answer: D I agree it should be D, since we have to read this question from the ISP point of view. We, on the ISP side, would be setting a local preference on the inbound routes from the customer AS to prefer one path over the other.