Cyber Monday 2024! Hurry Up, Grab the Special Discount - Save 25% - Ends In 00:00:00 Coupon code: SAVE25
Welcome to Pass4Success

- Free Preparation Discussions

Cisco Exam 500-220 Topic 2 Question 66 Discussion

Actual exam question for Cisco's 500-220 exam
Question #: 66
Topic #: 2
[All 500-220 Questions]

A customer requires a hub-and-spoke Auto VPN deployment with two NAT-mode hubs with dual uplink connections and 50 remote sites with a single uplink connection.

How many tunnels does each hub need to support?

Show Suggested Answer Hide Answer
Suggested Answer: D

https://documentation.meraki.com/Architectures_and_Best_Practices/Auto_VPN_Hub_Deployment_Recommendations

This is the number of tunnels that each hub needs to support in a hub-and-spoke Auto VPN deployment with two NAT-mode hubs with dual uplink connections and 50 remote sites with a single uplink connection.This can be calculated by using the formula for the hub tunnel count in a hub-and-spoke topology1:

Hub Tunnel Count = (H x (H - 1) / 2 x L1) + (H x S x L1 x L2)

Where H is the number of hubs, S is the number of spokes, L1 is the number of uplinks for the hubs, and L2 is the number of uplinks for the spokes. In this case, H = 2, S = 50, L1 = 2, and L2 = 1. Therefore,

Hub Tunnel Count = (2 x (2 - 1) / 2 x 2) + (2 x 50 x 2 x 1) Hub Tunnel Count = (2 x 1 / 2 x 2) + (200 x 2) Hub Tunnel Count = (2 / 2 x 2) + (400) Hub Tunnel Count = (1 x 2) + (400) Hub Tunnel Count = 2 + 400 Hub Tunnel Count =402

This question is related to the topic ofAuto VPN Hub Deployment Recommendationsin the Cisco Meraki documentation. You can find more information about this topic in theAuto VPN Hub Deployment Recommendationsarticle or theMeraki Auto VPN General Best Practicespage.


Contribute your Thoughts:

Julio
2 months ago
I'm picturing a hub with more tunnels than a mole has holes. But I'm sticking with B) 54, sounds like the logical choice here.
upvoted 0 times
Casey
1 months ago
But it's necessary for the Auto VPN deployment.
upvoted 0 times
...
Kristian
2 months ago
That's a lot of tunnels to manage.
upvoted 0 times
...
Ming
2 months ago
Yeah, each hub needs to support 54 tunnels.
upvoted 0 times
...
Ahmed
2 months ago
I think B) 54 is the right choice too.
upvoted 0 times
...
...
German
3 months ago
Ah, the joys of hub-and-spoke VPNs. I reckon D) 104 tunnels is the way to go, gotta be prepared for those dual uplinks, am I right?
upvoted 0 times
Sheridan
1 months ago
Definitely, better to have more tunnels than not enough in this type of deployment.
upvoted 0 times
...
Marvel
2 months ago
Yeah, I agree. It's important to have enough tunnels to support the network requirements.
upvoted 0 times
...
Katina
2 months ago
I think D) 104 tunnels is the correct answer, you need to account for all the remote sites and dual uplinks.
upvoted 0 times
...
...
Carry
3 months ago
Haha, 100 tunnels? What is this, a superhighway intersection? I'd go with A) 52 tunnels.
upvoted 0 times
Jolanda
2 months ago
D) Agreed, A) 52 is the most reasonable option.
upvoted 0 times
...
Rene
2 months ago
C) Definitely not 100 tunnels, that's too much.
upvoted 0 times
...
Elinore
2 months ago
B) I think it's too many tunnels, I would go with A) 52 as well.
upvoted 0 times
...
Hubert
3 months ago
A) 52 tunnels seems like the right choice.
upvoted 0 times
...
...
Catalina
3 months ago
That makes sense, so the answer is B) 54.
upvoted 0 times
...
Ben
3 months ago
But wouldn't each hub need to support 54 tunnels, considering the dual uplink connections?
upvoted 0 times
...
Ryan
3 months ago
I agree with Catalina, because there are 50 remote sites with a single uplink connection plus the two hubs with dual uplink connections.
upvoted 0 times
...
Catalina
3 months ago
I think each hub needs to support 52 tunnels.
upvoted 0 times
...
Barrett
3 months ago
Wait, so each remote site has a single uplink connection? I'm thinking B) 54 tunnels per hub.
upvoted 0 times
Leonora
3 months ago
Actually, each hub needs to support 52 tunnels because it needs a tunnel to each remote site and to the other hub. So, the correct answer is A) 52.
upvoted 0 times
...
Lucina
3 months ago
I agree, each remote site needs a tunnel to each hub, so it would be 50 tunnels per hub. That makes a total of 100 tunnels.
upvoted 0 times
...
...

Save Cancel
az-700  pass4success  az-104  200-301  200-201  cissp  350-401  350-201  350-501  350-601  350-801  350-901  az-720  az-305  pl-300  

Warning: Cannot modify header information - headers already sent by (output started at /pass.php:70) in /pass.php on line 77