Exam 300-620 topic 1 question 248 discussion

Actual exam question from Cisco's 300-620

Question #: 248
Topic #: 1

Refer to the exhibit. The default route is not present in the routing tables of the Cisco ACI leaf switches. All static and direct routes are currently being redistributed and advertised.

Which action must be taken to advertise a default route on the eBGP L3Out?

A. Enable a BGP peer prefix policy set to Always.
B. Configure a static default route on the ACI node profiles with next-hop null.
C. Create a Default Route Leak Policy on the L3Out.
D. Implement an export route map matching 0.0.0.0/0.

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Suggested Answer: C 🗳️

by ed27 at Feb. 17, 2024, 10:26 p.m.

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mdriraa

10 months, 1 week ago

Selected Answer: C

For external connections to the fabric that only require a default route, there is support for originating a default route for OSPF, EIGRP, and BGP L3Out connections. If a default route is received from an external peer, this route can be redistributed out to another peer following the transit export route control as described earlier in this article. A default route can also be advertised out using a Default Route Leak policy. This policy supports advertising a default route if it is present in the routing table or it always supports advertising a default route. The Default Route Leak policy is configured in the L3Out connection. https://www.cisco.com/c/en/us/td/docs/switches/datacenter/aci/apic/sw/2-x/L3_config/b_Cisco_APIC_Layer_3_Configuration_Guide/b_Cisco_APIC_Layer_3_Configuration_Guide_chapter_010100.html

upvoted 1 times

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ed27

1 year, 3 months ago

Selected Answer: C

There are two methods to advertise a default route (0.0.0.0/0) from BGP L3Out to the outside. 1. Transit Routing 2. Default Route Leak Policy

upvoted 3 times

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