Filtering routes is a little more complicated when we are talking about OSPF. In EIGRP it was simple. Since EIGRP is an advanced distance vector routing protocol, each router doesn't have a perfect picture of the routing domain, it just has an idea of what's behind our neighbor. OSPF is of course different. Each OSPF area …
Microsoft AD DNS – How to force Google Safe Search
Forcing safe-search for Google is very simple, and pretty hard to turn off. Couple it together with filtering DNS queries and you've got yourself a pretty robust content filter. First I'm going to show you the powershell way (run powershell as admin), then I will show you the GUI way. add-dnsserverprimaryzone -ReplicationScope Forest -Name …
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EIGRP Questions to Prepare you for the CCNP!
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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Basic EIGRP Manual Summarization and Null0
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 …
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Basic EIGRP Auto-Summary
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 …
Moving DHCP from Server to Server with Powershell
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 …
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