> > > > Hi- > > > > I'm working on a project within a large corporation and asked > > their network folks about getting a /19 from one of their > > /16s. I wanted it to avoid NAT and any possible overlapping > > from using RFC1918 addresses. This project gets connected to > > the internet at different times throughout the year at > > different locations through different ISPs. I would announce > > the /19 for a short period of time, maybe a month or so. > > > > The response I got back was that this was impossible since > > ISPs require an announcement of the /16 the /19 would come > > from. > > Maybe one of the (fairly rare, from what I see) actors that > ingress filter > (or takes into account those small few that does) by
strict > allocation border >? (What > prefixes are yopu talking about?) > > mh > ;) mh > > > I have done work with ISPs before (and have read the > > NANOG list for many years) but haven't heard of such a > > requirement nor can I find any standards that indicate the > same thing. > > > > Does anyone have requirements of a /19 announcement requires > > the /16 to be there as well? The company has plenty of /16s > > that it uses internally that are not being announced on the > > Internet at all. > > > > Thanks- > > > > -Eric > > > > > > >