DHCP server blocking existing local network

earthnathan

45 pts.

Tags:

DHCP server

MIkrotik router

Netgear Smart Switches

Hi, I have to configure Mikrotik router v5.0 for my WiFi setup, ehter1 configured as WAN, ether2 configured as LAN which gives (10.0.4.0/23) DHCP segment. when i connect this ehter2 to my existing local network (192.168.10.0/24) all my local systems getting block by the Mikrotik server. system which are connecting through WiFi getting authentication by mikrotik server and have no issues. both the local network and WiFi are in the same network. some of the switches are Netgear L2 switches and some switches are unmanaged, but none of the switches are configured. Please help me out to solve this issue. thanks SBN

Software/Hardware used:
Miikrotik v5.0 as wifi gateway & authentication server

Asked: October 9, 2012 3:29 AM Last updated: October 9, 2012 12:55 PM

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Last updated: October 11, 2012 1:17 PM GMT

Mubs110 pts.
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Thanks. We'll let you know when a new response is added.

Hi,

Please specify whether your Local network is running on a dhcp and if so you cannot run DHCP on the WIFI and the same time on the server on the local network.Otherwise make sure that you run it on the server only and just specify the scopes.

Discuss This Question: 9 Replies

Gabe9527 Oct 9, 2012 7:46 AM GMT

Do you mean you are using two different DHCP network on the same network segment? The reason this is bad is that the initial DHCP request is broardcast and there is no way of stopping the broardcast going to both or the wrong one. Either disallow the wireless netwrok from routing the DHCP traffic or add the DHCP scope of the wireless to your normal DHCP server.

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TomLiotta Oct 9, 2012 8:15 AM GMT

Since the network address seems to be different, there shouldn't be a problem with two DHCP servers. You'd need two, and they would broadcast to different networks.. And they apparently aren't on the same network segment because they don't have the same network address. But I'm not quite grasping what is meant by "blocked". Blocked from what? -- Tom

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Gabe9527 Oct 9, 2012 1:50 PM GMT

What do you mean by this "both the local network and WiFi are in the same network"?????The Config on the router will denote what network this is ok. Can you without to much specifics post what has been done so far.SSID - Port TCP/IP x.x.x.x/24Physical Port on Router - Route information to x.x.x.x/23

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TomLiotta Oct 12, 2012 1:16 AM GMT

...you cannot run DHCP on the WIFI and the same time on the server on the local network. Yes, you can. As with everything else, it just needs to be configured correctly and appropriately. I have two wireless networks here with their own DHCP servers and network addresses plugged into my main network with its own DHCP. We had a similar office (and inter-office) configuration at my previous employer site. A problem with this question is that it technically contradicts itself. There are, however, reasonable assumptions that can be made if the network addresses are correct. The reference to "same network" must mean "physical" rather than "logical". Tom

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earthnathan Oct 12, 2012 3:51 AM GMT

Hi, tnks for your reply. my local network is not in dhcp, only wifi access in dhcp. for local authentication i have cyberoam firewall for wifi i have mikrotik firewall. my requirement is 1. wifi users has to access internet and my intranet application through dhcp mikrotik gateway. 2.desktop connected in the same network can able to access through my local gateway (cyberoam) for authentication.

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TomLiotta Oct 12, 2012 5:59 AM GMT

wifi users has to access internet and my intranet application through dhcp mikrotik gateway. "DHCP" is not a "gateway". A device can provide both, but they are not the same functions. Does your Mikrotik provide any kind of NAT for WiFi users? Are there any devices that are not WiFi connected to the Mikrotik? Tom

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earthnathan Oct 12, 2012 8:11 AM GMT

Hi tnks for your reply,same network means in a common physical medium. blocked means i cant communicate btwn my local network systems unless its get authenticate by the mikrotik gateway.

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TomLiotta Oct 12, 2012 9:18 AM GMT

...for local authentication i have cyberoam firewall What do you mean by "authentication" from a firewall? What are you authenticating? And once again, are there any devices other than WiFi devices attached to the Mikrotik? Tom

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earthnathan Oct 16, 2012 5:14 AM GMT

Hi,my local users must authenticated by their user name provided to access the internet by cyberoam firewall. other than local users are need to access through mikrotik gateway. mikrotik is connected to my core switch and switch is splitted to other location and connected to wifi devices.

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