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To help us reinforce the concept of dynamic routing protocols,

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including use of BGP, I'd like to propose this scenario.

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Let's imagine we have a customer.

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They have connected their tier 0 gateway.

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This is tier 0 gateway 7 right here.

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And they've connected it to an external segment on the 10-220

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network with a 24-bit mask.

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And the external router is at .1.

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They've also configured border gateway protocol

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between the external router and the tier 0 gateway.

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However, the customer reports that VMs, for example,

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take this VM right here on the 10-20 network.
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X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000

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take this VM right here on the 10-20 network.

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It's at .21 on that subnet on segment 20.

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These VMs, they cannot ping the IP address of 10.220.0.1,

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which is the IP address of the external router running BGP.

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So I've got a couple of questions for you regarding this.

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Number one, what problems can you predict

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that could be hampering or causing the lack of connectivity

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for a ping test between this VM here, VM4,

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and the external gateway?

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Then secondly, based on those predictions

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of what could go wrong, I'd like you to propose some solutions
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X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000

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of what could go wrong, I'd like you to propose some solutions

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that could involve things to check or things to correct

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to go ahead and make sure we have full connectivity

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between our VMs and this external network.

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So that, my friend, is my challenge for you

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to pause for a few minutes.

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Think about that.

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List them out, either write them out or discuss them

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with somebody or at least process them in your head.

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And then when you're ready and want to compare notes,

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join me in the next video and we'll compare notes together.