In message <20151126053449.GA22347@eik.bme.hu>, =?utf-8?B?SsOBS8OTIEFuZHLDoXM=?= writes:
Well the requesting router could announce the route. ISC's client has hooks that allow this to be done. That is, after all, how routing is designed to work. The DHCP server usually is sitting in a data center on the other side of the country with zero ability to inject approptiate routes.
The DHCP relay could also have injected routes but that is a second class solution.
A CPE announcing the route is fine as long as the ISP controls the CPE.
If the CPE is controled by the customer, then the ISP's problems are similar. They need to find a way to filter the CPE's announcement so that it can announce only the prefixes delegated to it.
András
Which is why I mentioned the DHCP relay. Somewhere back towards the beginnings of this thread there was a reference to a blog post that complained that they couldn't workout how to send a git pull request to us. I've forwarded that to our dhcp team. For future reference dhcp-bugs@isc.org or dhcp-suggest@isc.org would have been fine places to send the request. So to the bug reporting form on isc.org which lets you select if it is bug, suggestion or a security issue. There also the general contact form which would get to the dhcp team after being forwarded a couple of times. Mark -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: marka@isc.org