troubleshooting Question

DHCP Server Win 2016 full arp cache

Avatar of amigan_99
amigan_99Flag for United States of America asked on
Windows OSDHCPNetworkingDesktops
1 Comment1 Solution83 ViewsLast Modified:
So one of my peers setup a 2016 on a VLAN/Subnet. He came to me the network guy to try and figure out why only 40 or leases had been assigned to his VMs. The subnet is a /23 with 512 potential addresses and 20 or so reserved. There's no helper address here - just a party on the VLAN. So I hopped onto the DHCP server to make sure he configured the
IP address OK etc. But what surprised me was when I ran arp -a I found like 450 addresses associated with MACs already. The DHCP manager showed only 40 or so assigned. Anyone have a thought how all of these addresses might have gotten assigned to the mac addresses while the DHCP server failed to make a note of it? I pinged a few of the addresses from the arp -a and could not reach them. These are VDI desktops to-be. If the addresses are not pingable DHCP should go ahead and assign an address right? It's not concerned with what's in the arp cache right? Or no??
ASKER CERTIFIED SOLUTION
Hello ThereSystem Administrator
Join our community to see this answer!
Unlock 1 Answer and 1 Comment.
Start Free Trial
Learn from the best

Network and collaborate with thousands of CTOs, CISOs, and IT Pros rooting for you and your success.

Andrew Hancock - VMware vExpert
See if this solution works for you by signing up for a 7 day free trial.
Unlock 1 Answer and 1 Comment.
Try for 7 days

”The time we save is the biggest benefit of E-E to our team. What could take multiple guys 2 hours or more each to find is accessed in around 15 minutes on Experts Exchange.

-Mike Kapnisakis, Warner Bros