Last night at a dinner party I was talking to a local service provider and somehow we got on the topic of whiskey and IP broadcast domains.
Let's say you have 200VMs and another 40 physical servers and hosts. What I want to do is be able to make a VM and then assign VMs static IPs using DHCP mapping using their MAC addresses.
I said I was planning to use a /21 or /22 of IP space, then using different IP ranges for different items to keep it all organized. He was saying a /22 even I'd see network degradation due to all of the broadcast traffic with around 250 VMs/ phys servers if I'm on 10G Ethernet.
Is that crazy? This guy is doing mostly professional offices for physical therapists and everything so I don't think he deals with big networks. It just seems like today's network gear wouldn't lose even 10% performance from having a /21 with 250 IPs used.
Let's say you have 200VMs and another 40 physical servers and hosts. What I want to do is be able to make a VM and then assign VMs static IPs using DHCP mapping using their MAC addresses.
I said I was planning to use a /21 or /22 of IP space, then using different IP ranges for different items to keep it all organized. He was saying a /22 even I'd see network degradation due to all of the broadcast traffic with around 250 VMs/ phys servers if I'm on 10G Ethernet.
Is that crazy? This guy is doing mostly professional offices for physical therapists and everything so I don't think he deals with big networks. It just seems like today's network gear wouldn't lose even 10% performance from having a /21 with 250 IPs used.