Refer to the exhibit. An engineer configures two ASBRs, 10.4.17.6 and 10.4.15.5, in an OSPF network to redistribute routes from EIGRP. However, both ASBRs show the EIGRP routes as equal costs even though the next-hop router 10.4.17.6 is closer to R1. How should the network traffic to the EIGRP prefixes be sent via 10.4.17.6?
To ensure the network traffic to the EIGRP prefixes is sent via 10.4.17.6, the redistributed prefixes should be advertised as Type 1 (E1). In OSPF, Type 1 external routes (E1) calculate the cost by adding the external cost to the internal cost of each link that the packet crosses, which accurately reflects the total path cost. This allows OSPF to consider both the internal and external routing costs, leading to more efficient routing decisions. In contrast, Type 2 external routes (E2) only consider the external cost, which can result in suboptimal routing when multiple ASBRs are involved. Advertising the routes as Type 1 will ensure that the closer ASBR will have a lower overall cost and thus will be preferred.
Type 1 routes increment metric hop by hop, type 2 doesn't - a router that's 1 hop away will have the same metric as a router 30 hops away.
Yes, it is B. BUT, none of the explanations below are correct. So if you would advertise any route as E1 is preferred over E2. So if your primary ASBR advertises the routes as an E1 routes, they are automatically preferred over E2 routes. More info: https://networklessons.com/ospf/ospf-path-selection-explained
Correction, since R1 is closer to 10.4.17.6 destination: The redistributed prefixes should be advertised as Type 1. If we apply this to 10.4.17.6 is preferred as E1 > D2. However if we apply to both redistributing routers, the metric from R1 to 10.4.17.6 should still be lower.
you vare right though answer is B, type 1 > type 2, but I was just pointing that out ass well that since 10.4.17.6 is closer (in hop?? in metric??) than it really shouldn't matter the network type.
you vare right though answer is B, type 1 > type 2, but I was just pointing that out ass well that since 10.4.17.6 is closer (in hop?? in metric??) than it really shouldn't matter the network type.
You are correct
The answer is B. When there are multiple ASBB, you need to use E1. * E1: Type O E1 external routes calculate the cost by adding the external cost to the internal cost of each link that the packet crosses. Use this type to avoid suboptimal routing when there are multiple ASBRs advertising an external route to the same AS. * E2 (default): The external cost of O E2 packet routes is always the external cost only. Use this type if only one ASBR is advertising an external route to the AS.
given ans is correct
I think the answer is d, because, the 2 route have the same distance....we want go fot 6.6
B is correct
B is correct
I go with D