Refer to the exhibit. Troubleshoot and ensure that branch ׀’ only ever uses the MPLS ׀’ network to reach HQ.
Which action achieves this requirement?
Refer to the exhibit. Troubleshoot and ensure that branch ׀’ only ever uses the MPLS ׀’ network to reach HQ.
Which action achieves this requirement?
To ensure that Branch B only ever uses the MPLS B network to reach HQ, the appropriate action is to block any alternative routes that Branch B might take through Branch A. Introducing an AS path filter on Branch A routers prevents Branch B from learning about any paths through Branch A, forcing it to always use MPLS B. This ensures that the conditions specified in the question are met effectively.
Answer D seems most logical. Question says that Branch B ONLY EVER uses MPLS B. That means you don't want the path through Branch A as an alternate. So A, B and C all prefer HQ routes, but they don't eliminate Branch A routes. D is the only answer which actually filters the route.
Yea I cant see it being any answer other than D. Completely filter out the AS and only advertising the local prefixes ensures that through MPLS B will be on the only option in the bgp table...
Yes. D seems correct because the question says: "only ever uses". So I think it means it should not use MPLS A at all.
A - the path through branch A is worsened by the lengthening of AS-path, keeping the alternative. Condition "only ever uses" is not met. B - when the route with the best WEIGHT disappears from the table, traffic will flow through branch A. Condition "only ever uses" is not met. C - the path through branch A is still preserved, the path through MPLS B is being improved by LP. D(correct answer) - office A advertises up and to the right of the picture only its own routes, branch B does not have an alternative route to HQ, branch B ONLY EVER USES the MPLS B network to reach HQ. * - I assume that ׀' is B.
For me the site codification has a problem. The text with correct codification is below: Troubleshoot and ensure that branch B only ever uses the MPLS B network to reach HQ. Which action achieves this requirement? (A) Modify the weight of all HQ prefixes received at branch B from the MPLS B network to be higher than the weights used on the MPLS A network (B) Increase the local preference for all HQ prefixes received at branch B from the MPLS B network to be higher than the local preferences used on the MPLS A network (C) Introduce AS path prepending on the branch A MPLS B network connection so that any HQ advertisements from branch A toward the MPLS B network are prepended three times (D) Introduce an AS path filter on branch A routers so that only local prefixes are advertised into BGP
Isn't Answer D correct?
B is the corect one.
B seems to be the correct one According to Image, you should be routed via Branch A D is incorrect, if you Introduce an AS path filter on branch A routers so that only local prefixes are advertised into BGP, how the branch B will know the path via Branch A to the Network HQ?
Refer to the exhibit. Troubleshoot and ensure that branch B only ever uses the MPLS B network to reach HQ. Which action achieves this requirement? Thats the entire question.. Only D will satisfy this. The other answers just make the route less preferable oppose to completely removing.
I see, thanks, looks like this image is broken, makes think it should go via branch A, and not directly to HQ as we can see the red sign.
Alnet is correct with his explanation, D is correct it would seem
B is the correct one
B is wrong. route from branch A goes to MPLS B. D is correct.
After reading the questions many times, D is seem to be the correct one. Other answers just make the route via MPLS B is prefer to MPLS A. If the link is down, B will go to A to HQ. So D is the correct one
To me B is not correct because in this case we're using a MPLS network and the weight variable only exits on cisco equipment and is for local use, and D option seemed most appropiate.
Branch A with option D, is not transit AS for the other two AS, thus BRANCH B always goes to MPLS B to HQ
The only way to be shure that branch B do do not use Branch A as transit is jus filter Branch A to filter the annoumcent to HQ, So D is correct
as many users as said the only answer that can be the true one is D the other answers are just make the route less prefered, by the way we assume that the branch is using another ASN number, because if the ASN is the same the advertisement will be sent anyway because they are ibgp neighbors and when you receive and ibgp update the ASN number is not specified in the update (remember that if also Branch B will be an ibgp neighbor to configure RR in RB)
Diagram shows ibgp in branch A
The provided answer is correct. For D, MPLS is working with iBGP. Don't know how to use AS_PATH filter.
it´s D