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RE: Pitfalls of annoucing /24s
Don't know for certain, but I announce from time-time singular /24s out of my 64.x block (without announcing entire block, although at times I'd announce entire block as two /20s well) and have seen no problems with verio or anybody else. On Wed, 15 Oct 2003, Jean-Christophe Smith wrote: > > > I noticed the verio filter policy, in relation to inbound: > - In the traditional Class A space (i.e., 0/1), we accept /22 and shorter. > > If I want to announce a /24 in the 64.x.x.x space(traditional Class A space) > am I'm going to have a problem with other networks that have peer filters > similar to Verios? > > Thanks, > Jean-Christophe Smith > > -----Original Message----- > From: Phil Rosenthal [mailto:[email protected]] > Sent: Wednesday, October 15, 2003 1:47 PM > To: John Palmer > Cc: [email protected] > Subject: Re: Pitfalls of annoucing /24s > > > http://info.us.bb.verio.net/routing.html#PeerFilter > > That's how Verio does it, and I assume, that's how most people who > filter by length do it as well. > > --Phil > On Oct 15, 2003, at 4:40 PM, John Palmer wrote: > > > > > Good question. > > > > You know there are thousands of legacy /24's out there that were > > allocated by > > IANA as /24's How can you aggregate them up if all you have is the /24? > > > > To those who filter out /24's - how is this done - just by the netmask > > size? > > > > ----- Original Message ----- > > From: "Jean-Christophe Smith" <[email protected]> > > To: <[email protected]> > > Sent: Wednesday, October 15, 2003 15:34 > > Subject: Pitfalls of annoucing /24s > > > > > >> > >> > >> In current practice would there be serious jeopardy of portions of the > >> internet not being able to reach this address space due to bgp > >> filters or > >> other restrictions? What is the smallest acceptable block of IPs that > >> can be > >> announced without adverse or unpredictable results? Verio would most > >> likely > >> be picking up these routes from us. I don't want to cause a religious > >> debate, but I am interested in what the industry consensus is. > >> > >> I'm just doing some research, any comments would be appreciated. > >> > >> Thanks, > >> Jean-Christophe Smith > >> > >> > > > > > --Phil Rosenthal > ISPrime, Inc.