From: Frank W. <Fra...@ct...> - 2008-03-06 08:22:10
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Hi all, I wonder if it is possible to have a trunked port, let's say vlan10 and vlan20 on the same NIC, and have dhcpd distribute different address pools to clients in the vlans? The vlan-tag is certainly stripped off the packet before it is passed to dhcpd, so dhcpd has no way of knowing which vlan the request came from. I know there is some possibility to configure the clients to include some label in the request, and differenciate them using that on the server, but that would mean reconfigureing all the clients.... Thanks for any ideas, Frank -- _______________________________________________ Centre de Technologie de l'Education 29 avenue John F. Kennedy L-1855 Luxembourg-Kirchberg email: Fra...@ct... tél.: +352 247-85973 fax: +352 333797 _______________________________________________ |
From: John J. <jo...@jo...> - 2008-03-06 09:49:53
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Frank, VLANs can be considered "virtual network cards" with separate IP subnets. A client would only be on one or the other VLAN, never on both at the same time. dhcpd should not have any issues with this nor would you need to reconfigure you clients. I run DL with VLANs myself. Or I might have completely misunderstood your email.... Regards, John Jore ________________________________________ From: dev...@li... [dev...@li...] On Behalf Of Frank Weis [Fra...@ct...] Sent: 06 March 2008 08:22 To: dev...@li... Subject: [Devil-Linux-discuss] Slightly OT: DHCPD and 802.1q trunk Hi all, I wonder if it is possible to have a trunked port, let's say vlan10 and vlan20 on the same NIC, and have dhcpd distribute different address pools to clients in the vlans? The vlan-tag is certainly stripped off the packet before it is passed to dhcpd, so dhcpd has no way of knowing which vlan the request came from. I know there is some possibility to configure the clients to include some label in the request, and differenciate them using that on the server, but that would mean reconfigureing all the clients.... Thanks for any ideas, Frank -- _______________________________________________ Centre de Technologie de l'Education 29 avenue John F. Kennedy L-1855 Luxembourg-Kirchberg email: Fra...@ct... tél.: +352 247-85973 fax: +352 333797 _______________________________________________ ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Devil-linux-discuss mailing list Dev...@li... https://lists.sourceforge.net/lists/listinfo/devil-linux-discuss |
From: Frank W. <Fra...@ct...> - 2008-03-06 10:09:02
|
Hi again, let me explain the problem I experience: I have two ranges on my dhcp server, that should be distributed to clients on the two vlans: shared-network LAN { subnet 192.168.123.0 netmask 255.255.255.0 { range 192.168.123.50 192.168.123.100; default-lease-time 60000; max-lease-time 72000; option broadcast-address 192.168.123.255; option domain-name "ebac"; option routers 192.168.123.1; } subnet 10.0.0.0 netmask 255.255.0.0 { range 10.0.0.100 10.0.0.200; default-lease-time 60000; max-lease-time 72000; option broadcast-address 10.0.255.255; option domain-name "lan"; option routers 10.0.0.1; } } Both ranges are on two VLANs on the same physical NIC: vlan100 Link encap:Ethernet HWaddr 00:10:F3:12:52:7D inet addr:10.0.0.1 Bcast:10.255.255.255 Mask:255.255.0.0 vlan103 Link encap:Ethernet HWaddr 00:10:F3:12:52:7D inet addr:192.168.123.1 Bcast:192.168.123.255 Mask:255.255.255.0 Unfortunately, hosts in both VLANs get addresses from the same pool.... Thanks for your input! Frank On Thursday 06 March 2008 10:46:53 John Jore wrote: > Frank, > VLANs can be considered "virtual network cards" with separate IP subnets. A > client would only be on one or the other VLAN, never on both at the same > time. dhcpd should not have any issues with this nor would you need to > reconfigure you clients. I run DL with VLANs myself. > > Or I might have completely misunderstood your email.... > > > Regards, > John Jore > > ________________________________________ > From: dev...@li... > [dev...@li...] On Behalf Of Frank Weis > [Fra...@ct...] Sent: 06 March 2008 08:22 > To: dev...@li... > Subject: [Devil-Linux-discuss] Slightly OT: DHCPD and 802.1q trunk > > Hi all, > > I wonder if it is possible to have a trunked port, let's say vlan10 and > vlan20 on the same NIC, and have dhcpd distribute different address pools > to clients in the vlans? The vlan-tag is certainly stripped off the packet > before it is passed to dhcpd, so dhcpd has no way of knowing which vlan the > request came from. > > I know there is some possibility to configure the clients to include some > label in the request, and differenciate them using that on the server, but > that would mean reconfigureing all the clients.... > > > Thanks for any ideas, > > Frank > -- > _______________________________________________ > Centre de Technologie de l'Education > 29 avenue John F. Kennedy > L-1855 Luxembourg-Kirchberg > email: Fra...@ct... > tél.: +352 247-85973 > fax: +352 333797 > _______________________________________________ > > ------------------------------------------------------------------------- > This SF.net email is sponsored by: Microsoft > Defy all challenges. Microsoft(R) Visual Studio 2008. > http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ > _______________________________________________ > Devil-linux-discuss mailing list > Dev...@li... > https://lists.sourceforge.net/lists/listinfo/devil-linux-discuss > > ------------------------------------------------------------------------- > This SF.net email is sponsored by: Microsoft > Defy all challenges. Microsoft(R) Visual Studio 2008. > http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ > _______________________________________________ > Devil-linux-discuss mailing list > Dev...@li... > https://lists.sourceforge.net/lists/listinfo/devil-linux-discuss -- _______________________________________________ Centre de Technologie de l'Education 29 avenue John F. Kennedy L-1855 Luxembourg-Kirchberg email: Fra...@ct... tél.: +352 247-85973 fax: +352 333797 _______________________________________________ |
From: Serge L. <fi...@in...> - 2008-03-06 10:10:34
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Hi, Frank Weis wrote: > I wonder if it is possible to have a trunked port, let's say vlan10 and vlan20 > on the same NIC, and have dhcpd distribute different address pools to clients > in the vlans? The vlan-tag is certainly stripped off the packet before it is > passed to dhcpd, so dhcpd has no way of knowing which vlan the request came > from. Correct, but if your vlans have different ip addressing schemes (I mean they are in different networks) you can just define 2 subnets in dhcpd.conf As far as I know dhcpd will serve the network from which it gets a request. -- Sincerely, Serge Leschinsky |
From: Serge L. <fi...@in...> - 2008-03-06 10:46:14
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Frank Weis wrote: > Hi again, > > let me explain the problem I experience: > > I have two ranges on my dhcp server, that should be distributed to clients on > the two vlans: > > shared-network LAN { I'm sorry, but is the line above really present in your dhcpd.conf file ? I suppose the config should be similar the following: -------------------------------------------------- max-lease-time 72000; default-lease-time 60000; subnet 192.168.123.0 netmask 255.255.255.0 { range 192.168.123.50 192.168.123.100; option broadcast-address 192.168.123.255; option domain-name "ebac"; option routers 192.168.123.1; } subnet 10.0.0.0 netmask 255.255.0.0 { range 10.0.0.100 10.0.0.200; option broadcast-address 10.0.255.255; option domain-name "lan"; option routers 10.0.0.1; } -------------------------------------------------- > subnet 192.168.123.0 netmask 255.255.255.0 { > range 192.168.123.50 192.168.123.100; > default-lease-time 60000; > max-lease-time 72000; > option broadcast-address 192.168.123.255; > option domain-name "ebac"; > option routers 192.168.123.1; > } > > subnet 10.0.0.0 netmask 255.255.0.0 { > range 10.0.0.100 10.0.0.200; > default-lease-time 60000; > max-lease-time 72000; > option broadcast-address 10.0.255.255; > option domain-name "lan"; > option routers 10.0.0.1; > } > } > -- Sincerely, Serge Leschinsky |
From: Frank W. <Fra...@ct...> - 2008-03-06 10:50:43
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On Thursday 06 March 2008 11:45:52 Serge Leschinsky wrote: > Frank Weis wrote: > > Hi again, > > > > let me explain the problem I experience: > > > > I have two ranges on my dhcp server, that should be distributed to > > clients on the two vlans: > > > > shared-network LAN { > > I'm sorry, but is the line above really present in your dhcpd.conf file ? Yep, I am beginning to suspect that this is not needed because I have VLANs... I'll test this asap, but unfortunately it is offsite, with real users connected :-) Thanks, Frank -- _______________________________________________ Centre de Technologie de l'Education 29 avenue John F. Kennedy L-1855 Luxembourg-Kirchberg email: Fra...@ct... tél.: +352 247-85973 fax: +352 333797 _______________________________________________ |