Exam 300-510 topic 1 question 104 discussion

Actual exam question from Cisco's 300-510

Question #: 104
Topic #: 1

Refer to the exhibit.

An engineer is troubleshooting IS-IS configuration between two areas. IS-IS Area-A network 30.1.1.0/24 is leaked into IS-IS Area-В. R2 is failing to filter the route updates from network 10.1.1.0/24. Which configuration must the engineer apply to resolve the issue?

A. R2(config)# ip prefix-list List2 seq 5 deny 10.1.1.0/24
R2(config)# interface fastethernet 0/0
R2(config-if)# ip router isis 100

R2(config-if)# router isis 100 -
R2(config-router)# distribute-list gateway List2 in
B. R2(config)# ip prefix-list List1 seq 3 deny 10.1.1.0/24
R2(config)# ip prefix-list List1 seq 5 permit 30.1.1.0/24 ge 25 1e
R2(config)# ip prefix-list List1 seq 10 permit 0.0.0.0/le 32
R2(config)# interface fastethernet 0/0
R2(config-if)# ip router isis 122

R2(config-if)# router isis 122 -
R2(config-router)# distribute-list prefix List1 in
C. R1(config)# ip prefix-list List2 seq 5 deny 10.1.1.0/24
R1(config)# interface fastethernet 0/0
R1(config-if)# ip router isis 100

R1(config-if)# router isis 100 -
R1(config-router)# distribute-list gateway List2 in

R (config-if)# router isis 150 -
R1(config-router)# distribute-list route-map Map1 in
D. R2(config)# access-list 101 deny ip any 10.1.1.0 0.0.0.127
R2(config)# access-list 101 permit ip any 30.1.1.0 0.0.0.63
R2(config)# access-list 101 deny ip any 0.0.0.0 0.0.0.0
R2(config)# interface fastethernet 0/0
R2(config-if)# ip router isis 121

R2(config-if)# router isis 121 -
R2(config-router)# distribute-list 101 in

Show Suggested Answer

Suggested Answer: A 🗳️

by nottoday2077 at April 6, 2023, 4:41 a.m.

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nottoday2077

Highly Voted 1 year, 9 months ago

Selected Answer: A

https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_isis/configuration/15-mt/irs-15-mt-book/isis-inbound-filtering.html Example: Configuring Route Filtering by Next Hop (or Route Source) The following example shows how to enable IS-IS inbound filtering using next hop or a route source: Device(config)# ip prefix-list List2 seq 5 deny 198.51.100.31/24 Device(config)# interface fastethernet 0/0 Device(config-if)# ip router isis 125 Device(config-if)# router isis 125 Device(config-router)# distribute-list gateway List2 in

upvoted 5 times

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thejag

Most Recent 1 year ago

Selected Answer: A

I learnt something new, NOT in the official Cisco SPRI training

upvoted 1 times

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DUsoo

1 year, 2 months ago

Selected Answer: A

"A" is correct

upvoted 1 times

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