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In my CCNP notes I usually have some questions about each topic to help me solidify the material (along with labs). Here are some EIGRP questions I would recommend trying to answer. If I were you, I would memorize these questions/answers. I promise they will help! Questions: What is the administrative distance of internal EIGRP? …
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EIGRP Summarization is used to simplify our routing table and advertise a summary instead of a bunch of prefixes that look the same. My current network topology is simple, I’ve basically configured EIGRP, then used the “network 0.0.0.0” command to advertise everything and form neighbors. Here is what my routing table looks like …
Continue reading “Basic EIGRP Manual Summarization and Null0”
In the above topology I have auto-summary enabled on R1 and R2. R3 does not have auto-summary. The result of this config is R1 and R2 will actually advertise the 10.0.0.0/8 network, since both of those 10. networks reside in that classful boundary. Since their only neighbor is R3, R3 will have a duplicate route …
My scenario: I needed to move DHCP from server 2012 to server 2012 R2 with leases. I wanted to do this quickly and safely. You can run all of these commands from your new DHCP server: Install DHCP + MGMT tools on the new server. Install-windowsfeature DHCP -includemanagementtools Authorize the new server Add-DhcpServerInDC Backup the …
Continue reading “Moving DHCP from Server to Server with Powershell”
What problem are we trying to solve? We want to prevent the rouge DHCP Server from assinging addresses out to our clients. Normally this would be your favorite wanna-be IT employee that brings his own Linksys router in the mix to fix the network 🙂 Of course it can also protect from malicious …
Continue reading “Basic Prevention of Rouge DHCP Servers with DHCP Snooping”