Master server, multiple cisco relays, many subnets.
Matt Jenkins
matt at smarterbroadband.net
Wed Aug 20 04:32:20 UTC 2008
Hello All,
I manage the network for a WISP and need to migrate away from my Cisco
routers serving DHCP. I think I have an understanding of what I need to
do to configure a central DHCP server but I am still a little lost after
reading the archives, man pages, example conf files, etc. I have setup
dhcp servers before on most variations of Linux/BSD/Windows. I am also
very knowledgeable with Linux/BSD for 8+ years now. What I need help
with is the giaddr identification that each cisco router will pass to
the Master server.
I will have a master server located at one site and 4-5 cisco routers
sending requests to it. Each router will have multiple /24 ranges that
will be in the dhcp server. I need to make sure the correct addresses
are passed through the correct routers. Customers devices will receive a
random public IP from one of the ranges that that cisco has routes for.
I am trying to not put a dhcp server on each network.
For a small example (All Ips are imaginary):
Master Server
Eth0 12.1.1.10
Eth0:1 10.10.0.88
Cisco 1
Serial0 88.15.15.89
FastEthernet0
- 21.17.21.1
- 21.17.22.1
DHCP Ranges
21.17.21.0/24
21.17.22.0/24
Cisco 2
Serial0 65.45.158.48
FastEthernet0
- 52.84.19.1
- 68.54.78.1
DHCP Ranges
52.84.19.0/24
68.54.78.0/24
I want the DHCP server to handle all those dhcp ranges but only relay
them to the correct cisco router. Is this possible?
Thank you,
Matt Jenkins
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