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Sizing DHCP in Windows Server 2012 R2 running in VMware
Hello
I want to run about 10,000 scopes on two Windows 2012 R2 servers using DHCP Failover. I've been trawling the 'net but I can't find anything which matches scopes and active leases / renewals etc to hardware - RAM, CPU etc. Are there any tools / websites out there anyone has come across ? - not 2003 ones - 2012 ones ?
I want to run about 10,000 scopes on two Windows 2012 R2 servers using DHCP Failover. I've been trawling the 'net but I can't find anything which matches scopes and active leases / renewals etc to hardware - RAM, CPU etc. Are there any tools / websites out there anyone has come across ? - not 2003 ones - 2012 ones ?
A DHCP server is a low intensity app.
you could use netsh dhcp server dump/export/import
to build the file on one, and then make changes and load on the other with changes to the allocating pools.
presumably each scope will be 30/70 between the two dhcp
you can alternate the distribution between DHCPs and scope
scope 1 dhcp1/dhcp2 30/70
scope 2 dhcp1/dhcp2 70/30
A scope's option lease type will dectate how frequently dhcp packets will be sent to renew an IP
DHCp is receive a request, match to a scope based on the packet, offer an IP in the scope, if accepted good, if rejected. minimal interaction
I would suggest your servers do more than just DHCP, DNS, etc.
you could use netsh dhcp server dump/export/import
to build the file on one, and then make changes and load on the other with changes to the allocating pools.
presumably each scope will be 30/70 between the two dhcp
you can alternate the distribution between DHCPs and scope
scope 1 dhcp1/dhcp2 30/70
scope 2 dhcp1/dhcp2 70/30
A scope's option lease type will dectate how frequently dhcp packets will be sent to renew an IP
DHCp is receive a request, match to a scope based on the packet, offer an IP in the scope, if accepted good, if rejected. minimal interaction
I would suggest your servers do more than just DHCP, DNS, etc.
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Hi Rharland ..
yeah, read that earlier, but I wondered if there was any specific hardware requirements / sizing calculator - eg put in your hardware spec and number of scopes, lease duration etc .. used to be an AD sizer back in the day. doesn't seem to be anything out there these days, outside of Exchange. Also, hardware pretty much out of date. Can estimate from there, but was after something more specific.
Hey Arnold : 2012 R2 has DHCP Failover with load balancing to get past split scopes. Same scopes on both servers, clients going to one or the other.
yeah, read that earlier, but I wondered if there was any specific hardware requirements / sizing calculator - eg put in your hardware spec and number of scopes, lease duration etc .. used to be an AD sizer back in the day. doesn't seem to be anything out there these days, outside of Exchange. Also, hardware pretty much out of date. Can estimate from there, but was after something more specific.
Hey Arnold : 2012 R2 has DHCP Failover with load balancing to get past split scopes. Same scopes on both servers, clients going to one or the other.
I wish you luck!
ASKER
yeah :)
a two year old blog page with old kit seems to be the best that's out there! .. incredible to think there's not some basic way of sizing DHCP elements to hardware. Had better tools 15 years ago in the old resource kit!
a two year old blog page with old kit seems to be the best that's out there! .. incredible to think there's not some basic way of sizing DHCP elements to hardware. Had better tools 15 years ago in the old resource kit!
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Perhaps the largest DHCP environments don't usually leverage Windows DHCP as the mechanism, hence the lack of docs. I'm sure some cableco/provider folks could likely shed some light on this question.
ASKER
With fear of sounding fancy and don't take this as pretentious, I work in a consultancy and they only deal in large FTSE 100 companies and I've never come across DHCP appliances. The only time I have was a while back, where appliances were used throughout universities. have you different experiences ?
The only larger environments I saw appliances in place were, in fact, universities!
Often large enterprises do not run off of a single/pair of DHCP servers with IP helper/ DHCP agents sending them requests from all router/switches/etc. Often the DHCP servers I would say in windows based environments are run along side an AD DC, DHCP, DNS.
DHCP is run on linux/unix based system when those are present
DHCP is run on linux/unix based system when those are present
As far as entering 10k scopes though.. I dont know