From the desk of: Sam C. Chan

Memo on Subnet Allocation

December 2, 2004

This document defines our official class C subnet allocation scheme. It was carefully designed to provide optimal manageability, efficiency and simplicity. It's been refined and proven over a decade in small businesses & branch offices environment. All sites must adhere to it to minimize unanticipated conflicts and limitations in various scenarios.

 

Bravo Class C Subnet Address Allocation

1 ( 1) primary gateway


DHCP scopes are universal across clients sites and BTC

2-50 (49) primary DHCP scope
51-99 (49) auxiliary DHCP scope


100-199 (10) static range, clt use
100 ( 1) primary server
101-109 ( 9) additional servers and key stations
110-119 (10) print servers
120-159 (40) workstations
160-189 (30) reserved (auxi gw, alt-site/HSBS/hm scopes, etc.)
190-199 (10) auxi gateways


200-254 (55) static range, btc internal use
200 ( 1) BTC primary server
201-209 ( 9) additional servers & Key stations
210-219 (10) printers
220-239 (20) workstations
240-254 (15) reserved (auxi gw, etc.)


Reserved DHCP by MAC in static range, or start at top-of-scope 

NOTE: (Number in Paraphrases) indicates how many addresses

Private Blocks
10.0.0.0 - 10.255.255.255
172.16.0.0 - 172.31.255.255
192.168.0.0 - 192.168.255.255

Key IP Addresses

Feli 64.246.40.35
NS1 64.246.41.200
NS2 64.246.41.201

google 216.239.57.99

DNS:
Front1 66.133.170.2
Front2 67.50.135.146

Front3 170.215.255.114
ELI CA: 207.173.225.3
EV1 207.218.245.135
EV2 207.218.247.135
EL1 207.69.188.185
EL2 207.69.188.186
TW1 24.92.226.13
TW2 24.92.226.174
Localnet1 207.251.201.12
Localnet2 207.251.201.11

email
pop.frontiernet.net
smtp.frontiernet.net
pop-server.rochester.rr.com
smtp-server.rochester.rr.com
mail.localnet.com

NTP
tock.usno.navy.mil

60101-60109 lpr

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