About interconnecting with new company, both companies uses OSPF and the questions is about how should you filter the ingress traffic between them

The correct answer is B. Use distribute-list. A distribute-list is the correct OSPF mechanism for filtering routes. In OSPF, a distribute-list is applied to control which routes are installed into the local routing table (inbound filtering) or advertised to neighbors, and it can reference an ACL or prefix-list to define…

Advanced Addressing and Routing Solutions

Question

Options

AUse eigrp on the other company
BUse distribute-list
CUse prefix-list
DUse ACL

How the community answered

(27 responses)

B
89% (24)
C
4% (1)
D
7% (2)

Explanation

A distribute-list is the correct OSPF mechanism for filtering routes. In OSPF, a distribute-list is applied to control which routes are installed into the local routing table (inbound filtering) or advertised to neighbors, and it can reference an ACL or prefix-list to define what to filter. While prefix-lists can be used as the matching criteria within a distribute-list, the distribute-list is the actual filtering mechanism applied to the OSPF process. Switching to EIGRP is unnecessary and disruptive. Using a plain ACL alone does not filter OSPF route advertisements.

Topics

#OSPF#route filtering#distribute-list#inter-company routing

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