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Re: DHCP on multiple interfaces in different networks



The two networks are distinct, and *must not* be connected by any kind of router or gateway. This means, that the server is to provide services independently on both distinct networks, where one is connected to the internet, the other not.

What disturbs me most, is that the way the options are presented in Server Admin, one would think that this is possible. However, the log file tells me that only one interface is being served (by DHCP) and I can't get any addresses on the other, even if I enable both interfaces. There are, unfortunately, no further errors in the log files.

Robert

On 29 Jun 2005, at 20:13, John Mundt wrote:

I don't know a solution for the two interfaces in Tiger, but you if you have a router routing between the two interfaces, you can tell the router to take DHCP addresses on one interface and put them on the second interface.

Suppose you have networks 10.10.10.0/24 and 10.10.11.0/24. Your dhcp Tiger server is 10.10.11.1 and you are going to pass requests from 10.10.10.0 to it. In Cisco's case, you'd edit the router interface for 10.10.10.0 and enter

    ip helper-address 10.10.11.1

and save.

The router then hears the dhcp request, forwards it to the tiger server, picks up the response and sends it back to the client.


John On Jun 29, 2005, at 9:13, Robert Frank wrote:


I just ran into a pecurliality:

I'm runing Tiger server with latest patches, I've enabled both interfaces, one being on the university's official network, the other on a private gigbit network which connects all servers (no gateway, no router) on their second interfaces.
I wanted to enable DHCP on both interfaces, where each interface serves different IP networks. The 'Server Admin' application provides checkboxes to select the interfaces for which the service is to be available. You can enter different network addresses and ip ranges, and you can successfully start the service.
However, when I look into the log files (and try out the services on the different networks), only ONE network is serviced, never both. If I select either one (but not both) interfaces, all is fine for the corresponding IP address.


Is this a feature, or a bug? Anyone else noticed this?

Departement Informatik FGB tel +41 (0)61 267 14 66
Universität Basel fax. +41 (0)61 267 14 61
Robert Frank
Klingelbergstrasse 50 email@hidden
CH-4056 Basel
Switzerland http:// www.informatik.unibas.ch/personen/frank_r.html



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 >DHCP on multiple interfaces in different networks (From: Robert Frank <email@hidden>)



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