Re: [gentoo-user] Be careful when using dhcp with a LiveCD
I guess eventually all dhcp implementations will catch up with this change, although for now it is bound to create some problems with particular DHCP You could try disconnecting your cable modem for about 10 minutes, ensuring the ISP recognizes that it's offline, and thus remove the entries in it's DHCP table for your connection. then when you boot your system normally, it might work like it used to. -- [EMAIL PROTECTED] mailing list
Re: [gentoo-user] Be careful when using dhcp with a LiveCD
On Friday 07 December 2007, b.n. wrote: Mick ha scritto: The point is: be careful when using dhcp from a LiveCD. Your system might act differently the next time you boot the hard drive. The dhcpcd was changed recently and not all dhcp servers take kindly to it, when it uses DUID the way it does (some servers depend on DUID passing on to them the MAC of the client). The solution I also found was to set the vram flag. I'm really ignorant on networks. What has changed on the dhcp side so that *client* behaviour alters *server* behaviour? Isn't this horribly broken (from the server side), or there is some reason to behave that? I am no less ignorant I'm afraid, but this is how I understand it in simple terms: net-misc/dhcpcd-3.1.5-r1 has introduced a usage of DUID which is compliant with RFC 4361, and creates a client ID (this can be any string uniquely identifying the client interface). However, a number of DHCP server implementations expect the DUID to contain the MAC of the client and unless this is in a particular format the server falls over. The vrm flag allows the MAC to be used in the DUID field and then the server is happy to issue an IP address to the client. As an alternative one can try the dhcpcd -I option to specify the MAC of the client, but when I tried it I couldn't get it to work. I guess eventually all dhcp implementations will catch up with this change, although for now it is bound to create some problems with particular DHCP servers (cisco being one of them). On the other hand RFC 4361 may be superseded/reversed, dhcpcd will go back to how it was and the world will be a simpler place to live and network. :) HTH. -- Regards, Mick signature.asc Description: This is a digitally signed message part.
Re: [gentoo-user] Be careful when using dhcp with a LiveCD
On Friday 07 December 2007, Billy Holmes wrote: I guess eventually all dhcp implementations will catch up with this change, although for now it is bound to create some problems with particular DHCP You could try disconnecting your cable modem for about 10 minutes, ensuring the ISP recognizes that it's offline, and thus remove the entries in it's DHCP table for your connection. then when you boot your system normally, it might work like it used to. The OP probably has a cable problem where this suggestion may apply. In my case I was having problems with a local dhcp server on my LAN. Nothing would get going, other than recompiling dhcpcd with vram set as a USE flag. -- Regards, Mick signature.asc Description: This is a digitally signed message part.
Re: [gentoo-user] Be careful when using dhcp with a LiveCD
Billy Holmes wrote: I guess eventually all dhcp implementations will catch up with this change, although for now it is bound to create some problems with particular DHCP You could try disconnecting your cable modem for about 10 minutes, ensuring the ISP recognizes that it's offline, and thus remove the entries in it's DHCP table for your connection. then when you boot your system normally, it might work like it used to. Yes, that sound reasonable. The livecd was probably shut down without releasing the lease on the ip-address. Check the manual page on the dhcp-client on the live cd. There is probably some signal you can send it to make it release its lease. When the regular os comes back up in this situation, it wants /its/ old ip back. This might hang on a server restriction on only one ip per subscriber/mac address, or it might just trigger a bug somewhere. -- [EMAIL PROTECTED] mailing list
Re: [gentoo-user] Be careful when using dhcp with a LiveCD
On Thursday 06 December 2007, Grant wrote: I just spent a few hours trying to fix a problem where my Gentoo router would only dhcp the ip address of the cable modem instead of the proper IP address from the WAN. I ended up enabling USE=vram and it worked again. # equery uses dhcpcd + + vram : Disable DUID due to volatile media, such as a LiveCD I had just previously booted to a Damn Small Linux LiveCD when the trouble started so I'm thinking the CD tried to dhcp from my cable internet provider without a DUID which caused the provider to change something which means that I need to disable the DUID from now on? It's confusing but that's the best I can come up with. The point is: be careful when using dhcp from a LiveCD. Your system might act differently the next time you boot the hard drive. The dhcpcd was changed recently and not all dhcp servers take kindly to it, when it uses DUID the way it does (some servers depend on DUID passing on to them the MAC of the client). The solution I also found was to set the vram flag. -- Regards, Mick signature.asc Description: This is a digitally signed message part.
Re: [gentoo-user] Be careful when using dhcp with a LiveCD
I just spent a few hours trying to fix a problem where my Gentoo router would only dhcp the ip address of the cable modem instead of the proper IP address from the WAN. I ended up enabling USE=vram and it worked again. # equery uses dhcpcd + + vram : Disable DUID due to volatile media, such as a LiveCD I had just previously booted to a Damn Small Linux LiveCD when the trouble started so I'm thinking the CD tried to dhcp from my cable internet provider without a DUID which caused the provider to change something which means that I need to disable the DUID from now on? It's confusing but that's the best I can come up with. The point is: be careful when using dhcp from a LiveCD. Your system might act differently the next time you boot the hard drive. The dhcpcd was changed recently and not all dhcp servers take kindly to it, when it uses DUID the way it does (some servers depend on DUID passing on to them the MAC of the client). The solution I also found was to set the vram flag. Something must have changed on my ISP's end when my router tried to dhcp via the Damn Small Linux LiveCD. It had been running dhcp just fine ever since I switched to this ISP (Cox) and failed every time after I booted that LiveCD until I enabled vram. - Grant -- [EMAIL PROTECTED] mailing list
Re: [gentoo-user] Be careful when using dhcp with a LiveCD
Mick ha scritto: The point is: be careful when using dhcp from a LiveCD. Your system might act differently the next time you boot the hard drive. The dhcpcd was changed recently and not all dhcp servers take kindly to it, when it uses DUID the way it does (some servers depend on DUID passing on to them the MAC of the client). The solution I also found was to set the vram flag. I'm really ignorant on networks. What has changed on the dhcp side so that *client* behaviour alters *server* behaviour? Isn't this horribly broken (from the server side), or there is some reason to behave that? m. -- [EMAIL PROTECTED] mailing list
