troubleshooting Question
DHCP Server Win 2016 full arp cache
asked on
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??
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??
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