DHCPD , dhcp relays on a large network
Randy Grimshaw
rgrimsha at syr.edu
Fri Nov 10 03:29:44 UTC 2006
alexandru:
In your example the dhcp server does not need to be aware of the
vlans - that is being handled by your switches. Because they are acting
as bootp helpers right? It sounds like you need to review your
configuration for subnets. I suspect you may have more shared nets than
you realize.
<><Randy
<><Randall Grimshaw
Room 203 Machinery Hall
Syracuse University
Syracuse, NY 13244
315-443-5779
rgrimsha at syr.edu
>>> alexandru.coseru at totaltelecom.ro 11/09/06 5:55 PM >>>
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Hello..
I have a large network with a couple of subnets and i want to configure
=
a DHCPD server to lease IP addresses to clients , connected through =
layer3 switches with relay agents on them.
Attached is a small representation (no of l3 switches reduced , to =
make it easier to understand).
On each switch I have some subnets , each one assigned to a specific =
VLAN.
Between switches , I'm running OSPF , linked with quagga on srv1 =
(configured as ASBR) , which is also an internet router (running bgpd =
with several ISPs).
Srv1: has ip address 10.1.1.1 on VLAN 2. The switches have IP =
10.1.1.x , on VLAN 2 also... This VLAN is used for management and =
OSPF..
Each switch has an VLAN2 address and a specific VLAN assigned to the =
clients subnet. VLAN10,VLAN11 , VLAN12 , etc....
When I'm trying to declare all subnets in dhcpd.conf , i have the =
following error: No subnet declaration for xxxxx.
I cannot define aliases on the srv1 , cause it will break the internet =
routing...
What should I do ?
a) Install an separate server for DHCPD and define eth0:1 =
192.168.1.1/24 eth0:2 192.168.2.1/24 , etc on it ?
b) Declare a subnet of 192.168.0.0/ 255.255.0.0 in dhcpd.conf ?
Thanks
Alex
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