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тАО08-15-2008 04:17 AM
тАО08-15-2008 04:17 AM
DHCP Relay problems
I am having some problems setting up a DHCP Relay on my 4104gl (J4887A). I think I have set it up correctly but it my clients don't seem to be able to see the DHCP server.
Here is what I am trying to do. I have 3 vlans. vlan1 is where I am trying to install the DHCP relay, currently my windows clients are on the same class b subnet 12.24.x.x including the DHCP server (Win2003 - 10.24.4.2) I want to move the DHCP server over to a new class c subnet with the ip address 10.161.236.3 but keeping it on vlan1. I have added the ip helper address into the switch and changed the DHCP server address over to the class c network but the DHCP clients on the existing network don't seem to be able to get any addresses.
I am not sure how I can check to see if it a configuration problem with switch or with my DHCP server.
Here is a copy of the configuration report:
hostname "Procurve1"
cdp run
web-management ssl
module 1 type J4908A
module 2 type J4908A
module 3 type J4862B
module 4 type J4862B
ip default-gateway 10.24.4.1
ip routing
ip timep manual 10.24.4.254 interval 60
snmp-server community "public" Unrestricted
vlan 1
name "DEFAULT_VLAN"
untagged A1-A22,B1,B3-B6,B9-B14,B16-B22,C1-C4,C6-C17,C19-C23,D1-D24
ip address 10.74.4.1 255.255.0.0
ip address 10.24.4.1 255.255.0.0
ip address 10.54.0.1 255.255.0.0
ip address 10.161.236.2 255.255.254.0
ip address 10.48.4.1 255.255.255.0
ip address 10.161.235.2 255.255.255.0
ip helper-address 10.161.236.3
no untagged B2,B7-B8,B15,C5,C18,C24
exit
vlan 2
name "VLAN2"
untagged B7-B8
tagged A21-A22
exit
vlan 99
name "VLAN3"
untagged B2,B15,C5,C18,C24
tagged A21-A22,C15,C17
exit
ip authorized-managers 10.74.0.0 255.255.0.0
ip authorized-managers 10.24.0.0 255.255.0.0
no dhcp-relay
ip route 172.148.96.0 255.255.255.0 10.24.4.254
ip route 172.24.4.0 255.255.255.0 10.24.4.254
ip route 0.0.0.0 0.0.0.0 10.24.4.254
no stack
spanning-tree
I would appreciate any help as I am really stuck!!
Thanks in advance.
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тАО08-15-2008 04:23 AM
тАО08-15-2008 04:23 AM
Re: DHCP Relay problems
hostname "Procurve1"
cdp run
web-management ssl
module 1 type J4908A
module 2 type J4908A
module 3 type J4862B
module 4 type J4862B
ip default-gateway 10.24.4.1
ip routing
ip timep manual 10.24.4.254 interval 60
snmp-server community "public" Unrestricted
vlan 1
name "DEFAULT_VLAN"
untagged A1-A22,B1,B3-B6,B9-B14,B16-B22,C1-C4,C6-C17,C19-C23,D1-D24
ip address 10.74.4.1 255.255.0.0
ip address 10.24.4.1 255.255.0.0
ip address 10.54.0.1 255.255.0.0
ip address 10.161.236.2 255.255.254.0
ip address 10.48.4.1 255.255.255.0
ip address 10.161.235.2 255.255.255.0
ip helper-address 10.161.236.3
no untagged B2,B7-B8,B15,C5,C18,C24
exit
vlan 2
name "VLAN2"
untagged B7-B8
tagged A21-A22
exit
vlan 99
name "VLAN3"
untagged B2,B15,C5,C18,C24
tagged A21-A22,C15,C17
exit
ip authorized-managers 10.74.0.0 255.255.0.0
ip authorized-managers 10.24.0.0 255.255.0.0
ip route 172.148.96.0 255.255.255.0 10.24.4.254
ip route 172.24.4.0 255.255.255.0 10.24.4.254
ip route 0.0.0.0 0.0.0.0 10.24.4.254
no stack
spanning-tree
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тАО08-15-2008 04:27 AM
тАО08-15-2008 04:27 AM
Re: DHCP Relay problems
Try creating a DHCP superscope instead on your 2003 server. I believe that's what you're meant to do when multinetting as you're doing.
Is there a reason you are multinetting instead of putting each subnet in its own VLAN?
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тАО08-15-2008 04:35 AM
тАО08-15-2008 04:35 AM
Re: DHCP Relay problems
Thanks for the fast response.
Yes I did leave the no dhcp-relay in accidentally as I posted an old configuration report.
The reason I am multinetting is because I have been assigned the new class c ip range by the admins of a domain we are setting up a trust with and I didn't want to have to re-ip all of the clients as it isn't necessary. I am not sure how a superscope would work. I still want the DHCP server to assign class b addresses. Perhaps I haven't understood what you mean.
Thanks
Darren.
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тАО08-17-2008 04:42 AM
тАО08-17-2008 04:42 AM
Re: DHCP Relay problems
All you should need to do is create a Superscope on your 2003 DHCP Server:
http://technet.microsoft.com/en-us/library/cc757614.aspx
Also if you haven't done so, I'd start-stop the DHCP service (doesn't like it's IP address being changed).
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тАО08-18-2008 12:03 AM
тАО08-18-2008 12:03 AM
Re: DHCP Relay problems
what is dhcp server
default gateway address ?
subnet mask ?
and
scopes address range
cenk
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тАО08-18-2008 01:26 AM
тАО08-18-2008 01:26 AM
Re: DHCP Relay problems
Currently the DHCP server (Windows Server 2003) ip configuration is:
ip address: 10.24.4.2
subnet mask: 255.255.0.0 (Class B)
default gateway: 10.24.4.1
It services DHCP clients on the following subnets (all on the same vlan)
10.24.2.x - Static addresses
10.24.3.x - Static addresses
10.24.4.x - Static addresses
10.24.40.100-199 - DHCP Scope
These ranges are used by our dhcp clients (running windows xp/vista)
I want to move the DHCP server onto a new class C subnet with the ip address 10.161.236.3 but I want to keep the DHCP clients on the same class B subnets.
Thanks
Darren.
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тАО08-18-2008 05:40 AM
тАО08-18-2008 05:40 AM
Re: DHCP Relay problems
add dhcp server on nic manually second ip address ,subnet mask and default gateway
ip address 10.161.236.3
subnet mask 255.255.254.0
default gateway 10.161.236.2
cenk
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тАО08-18-2008 06:10 AM
тАО08-18-2008 06:10 AM
Re: DHCP Relay problems
Thanks for the reply but I don't understand what you mean.
Thanks anyway,
Darren.
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тАО08-18-2008 06:53 AM
тАО08-18-2008 06:53 AM
Re: DHCP Relay problems
ip address 10.161.236.3
subnet mask 255.255.254.0
default gateway 10.161.236.2