kabrutus
asked on
Large building wifi network, 2,000 wifi devices
I have to set up a wifi network with about 2000 wireless devices. I have the access points to do it, but should i setup dhcp on the ap's or should i setup a dhcp server to handle the ip's? It is only for internet browsing and nothing else. The building will provide me the bandwidth but not the ip's to support 2000 wifi clients. i would plan for at least 2500 ip. I was thinkg of setting up a 2003 server with Dhcp on it
ASKER
All on 1 vlan. I was thinking a bunch of /22
If it's all one VLAN, then I would use one DHCP server. If possible, I'd use the gateway router that these access points will communicate through.
A /22 subnet gives you 1024 addresses to use and a /21 gives you 2048. Since you estimate seeing around 2000 addresses, I would round up to the next subnet range, and use a /20, for 4096 addresses. That's a very large wireless network, but it's better to have too many IP's then too few.
A /22 subnet gives you 1024 addresses to use and a /21 gives you 2048. Since you estimate seeing around 2000 addresses, I would round up to the next subnet range, and use a /20, for 4096 addresses. That's a very large wireless network, but it's better to have too many IP's then too few.
ASKER
Can i do that with windows 2003 server? If so, can you help me break down how the ip's should start and finish?
If you will have 2000 clients connected to wifi at the same time you DO NOT want them in the same subnet, that's for sure. Any solid analysis of this problem requires much more info: what is your upstream speed, how much traffic do you expect that clients will request, will you guarantee any bandwidth per client or best effort only, are clients mobile within building (for example, person with wifi enabled phone moving between floors) or fixed (someone sits with laptop and doesn't move while surfing), how many APs will you have, do you have VLAN enabled switches... plus the RF planning side of the problem, which is completely separate issue.
Easy answer would be: setup DHCP on AP (different subnet on each) and let APs do the NAT.
Even easier answer (if you have zillion $$ in your pocket): call Cisco, they will do it for you.
Easy answer would be: setup DHCP on AP (different subnet on each) and let APs do the NAT.
Even easier answer (if you have zillion $$ in your pocket): call Cisco, they will do it for you.
ASKER
Thats another thing i was thinking about... having DHCP on the AP's. My event is only for about a week, and all users will be roaming. If i set different ip pools on the Ap's, will that make it harder for the wifi clients to roam? I have enough Ap's.
What exactly is the AP brand/model?
ASKER
I have a few Xirrus X8
Looks like it supports roaming between devices, if you can figure out how to set it up. I can't give you any advice on that, never had one of those in my hands.
ASKER
They are really good systems. I have used them in hotels before, but the hotel would supply the IP's. Unfortuanly that is not the case this time around. So i think i will just setup DHCP on the arrays instead of the a dhcp server. All they need to do is browse the internet. Can you check my ip configuration below an let me know if this will work?
start ip 172.16.22.2
end ip 172.16.23.254
SM 255.255.252.0
GW 172.16.22.1
start ip 172.16.22.2
end ip 172.16.23.254
SM 255.255.252.0
GW 172.16.22.1
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ASKER
So lets say AP #10 does this look ok?
start ip 172.16.22.2
end ip 172.16.25.254
SM 255.255.252.0
GW 172.16.22.1
That seems like a lot of ips? Can i just get away with?
start ip 172.16.22.2
end ip 172.16.23.254
SM 255.255.252.0
GW 172.16.22.1
start ip 172.16.22.2
end ip 172.16.25.254
SM 255.255.252.0
GW 172.16.22.1
That seems like a lot of ips? Can i just get away with?
start ip 172.16.22.2
end ip 172.16.23.254
SM 255.255.252.0
GW 172.16.22.1
If mask is 255.255.252.0, you can't start subnet with 22:
AP1: x.x.0.2 - x.x.3.254
AP2: x.x.4.2 - x.x.7.254
AP3: x.x.8.2 - x.x.11.254
...
AP10: x.x.36.2 - x.x.39.254
This gives you about 1000 addresses on 1 AP. Maximum number of users on one XN8 seems to be 512, but if you have many roaming users, one address will stay used even when user moves to another AP (until lease time expires).
You can use as many of these addresses as you like, just check that building is not using them. If they happen to use these exact blocks, you can use any other block form private range.
AP1: x.x.0.2 - x.x.3.254
AP2: x.x.4.2 - x.x.7.254
AP3: x.x.8.2 - x.x.11.254
...
AP10: x.x.36.2 - x.x.39.254
This gives you about 1000 addresses on 1 AP. Maximum number of users on one XN8 seems to be 512, but if you have many roaming users, one address will stay used even when user moves to another AP (until lease time expires).
You can use as many of these addresses as you like, just check that building is not using them. If they happen to use these exact blocks, you can use any other block form private range.
ASKER
This is what i am using... I assume mine is wrong.. I am planing on about 14 pools. any chance on helping me fix these? Thanks for your help so far. as you can tell, im not a network guy...
Pool1 172.16.0.2 - 172.16.1.254 /255.255.252.0 172.16.0.1
Pool2 172.16.2.2 - 172.16.3.254 /255.255.252.0 172.16.2.1
Pool3 172.16.4.2 - 172.16.5.254 /255.255.252.0 172.16.4.1
Pool4 172.16.6.2 - 172.16.7.254 /255.255.252.0 172.16.6.1
Pool5 172.16.8.2 - 172.16.9.254 /255.255.252.0 172.16.8.1
Pool6 172.16.10.2 - 172.16.11.254 /255.255.252.0 172.16.10.1
Pool7 172.16.12.2 - 172.16.13.254 /255.255.252.0 172.16.12.1
Pool8 172.16.14.2 - 172.16.15.254 /255.255.252.0 172.16.14.1
Pool9 172.16.16.2 - 172.16.17.254 /255.255.252.0 172.16.16.1
Pool10 172.16.18.2 - 172.16.19.254 /255.255.252.0 172.16.18.1
Pool11 172.16.20.2 - 172.16.21.254 /255.255.252.0 172.16.20.1
Pool12 172.16.22.2 - 172.16.23.254 /255.255.252.0 172.16.22.1
Pool13 172.16.24.2 - 172.16.25.254 /255.255.252.0 172.16.24.1
Pool14 172.16.26.2 - 172.16.27.254 /255.255.252.0 172.16.26.1
Pool1 172.16.0.2 - 172.16.1.254 /255.255.252.0 172.16.0.1
Pool2 172.16.2.2 - 172.16.3.254 /255.255.252.0 172.16.2.1
Pool3 172.16.4.2 - 172.16.5.254 /255.255.252.0 172.16.4.1
Pool4 172.16.6.2 - 172.16.7.254 /255.255.252.0 172.16.6.1
Pool5 172.16.8.2 - 172.16.9.254 /255.255.252.0 172.16.8.1
Pool6 172.16.10.2 - 172.16.11.254 /255.255.252.0 172.16.10.1
Pool7 172.16.12.2 - 172.16.13.254 /255.255.252.0 172.16.12.1
Pool8 172.16.14.2 - 172.16.15.254 /255.255.252.0 172.16.14.1
Pool9 172.16.16.2 - 172.16.17.254 /255.255.252.0 172.16.16.1
Pool10 172.16.18.2 - 172.16.19.254 /255.255.252.0 172.16.18.1
Pool11 172.16.20.2 - 172.16.21.254 /255.255.252.0 172.16.20.1
Pool12 172.16.22.2 - 172.16.23.254 /255.255.252.0 172.16.22.1
Pool13 172.16.24.2 - 172.16.25.254 /255.255.252.0 172.16.24.1
Pool14 172.16.26.2 - 172.16.27.254 /255.255.252.0 172.16.26.1
ASKER
Ok, i think i got it... here is what i got...
Pool1 172.16.0.2 - 172.16.3.254 /255.255.252.0 172.16.0.1
Pool2 172.16.4.2 - 172.16.7.254 /255.255.252.0 172.16.4.1
Pool3 172.16.8.2 - 172.16.11.254 /255.255.252.0 172.16.8.1
Pool4 172.16.12.2 - 172.16.15.254 /255.255.252.0 172.16.12.1
Pool5 172.16.16.2 - 172.16.19.254 /255.255.252.0 172.16.16.1
Pool6 172.16.20.2 - 172.16.23.254 /255.255.252.0 172.16.20.1
Pool7 172.16.24.2 - 172.16.27.254 /255.255.252.0 172.16.24.1
Pool8 172.16.28.2 - 172.16.31.254 /255.255.252.0 172.16.28.1
Pool9 172.16.32.2 - 172.16.35.254 /255.255.252.0 172.16.32.1
Pool10 172.16.36.2 - 172.16.39.254 /255.255.252.0 172.16.36.1
Pool11 172.16.40.2 - 172.16.43.254 /255.255.252.0 172.16.40.1
Pool12 172.16.44.2 - 172.16.47.254 /255.255.252.0 172.16.44.1
Pool13 172.16.48.2 - 172.16.51.254 /255.255.252.0 172.16.48.1
Pool14 172.16.52.2 - 172.16.55.254 /255.255.252.0 172.16.52.1
Pool1 172.16.0.2 - 172.16.3.254 /255.255.252.0 172.16.0.1
Pool2 172.16.4.2 - 172.16.7.254 /255.255.252.0 172.16.4.1
Pool3 172.16.8.2 - 172.16.11.254 /255.255.252.0 172.16.8.1
Pool4 172.16.12.2 - 172.16.15.254 /255.255.252.0 172.16.12.1
Pool5 172.16.16.2 - 172.16.19.254 /255.255.252.0 172.16.16.1
Pool6 172.16.20.2 - 172.16.23.254 /255.255.252.0 172.16.20.1
Pool7 172.16.24.2 - 172.16.27.254 /255.255.252.0 172.16.24.1
Pool8 172.16.28.2 - 172.16.31.254 /255.255.252.0 172.16.28.1
Pool9 172.16.32.2 - 172.16.35.254 /255.255.252.0 172.16.32.1
Pool10 172.16.36.2 - 172.16.39.254 /255.255.252.0 172.16.36.1
Pool11 172.16.40.2 - 172.16.43.254 /255.255.252.0 172.16.40.1
Pool12 172.16.44.2 - 172.16.47.254 /255.255.252.0 172.16.44.1
Pool13 172.16.48.2 - 172.16.51.254 /255.255.252.0 172.16.48.1
Pool14 172.16.52.2 - 172.16.55.254 /255.255.252.0 172.16.52.1
that looks OK
Will all this traffic be on one VLAN, or are you planning on having multiple VLAN's or subnets?