North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: shim6 @ NANOG (forwarded note from John Payne)
>>> How about some actual technical complaints about shim6? >> good question. to give such discussion a base, could you >> point us to the documents which describe how to deploy it in >> the two most common situation operators see >> o a large multi-homed enterprise customer > There are no documents describing deployment. Probably there should be. > > The general approach is presumably well-known (for those for whom it > is not, go browse around <http://www.ietf.org/html.charters/shim6- > charter.html>, and perhaps in particular <http://www.ietf.org/ > internet-drafts/draft-ietf-shim6-proto-03.txt>. > > Deployment in an enterprise is a matter of: > > (a) deploying hosts with shim6-capable stacks within the enterprise; > > (b) arranging for those hosts to receive addresses in each PA > assignment made by each transit provider (multiple PA addresses per > interface), e.g. using dhcp6; > > (c) optionally, perhaps, installing shim6 middleware at some > suitable place between host and border in order to impose site policy > or modulate locator selection by the hosts. and this last will handle the normal site border (and these days intra-site, e.g., departmental, borders) issues such as o dns within the enterprise is isolated from that of outside o firewalls, algs, and sometimes nats o security policy in general o load balancing between upstreams o ... i.e, what handles the impedance mismatch between the goal, which is *site* multi-homing, and the tool, which is *host* multihoming? and how does it handle it, how is it managed, ...? > You will note I have glossed over several hundred minor details (and > several hundred more not-so-minor ones). The protocols are not yet > published; there is no known implementation. possibly this contributes to the sceptisim with which this is viewed? >> o a small to medium multi-homed tier-n isp > A small-to-medium, multi-homed, tier-n ISP can get PI space from > their RIR, and don't need to worry about shim6 at all. Ditto larger > ISPs, up to and including the largest. as it is not yet clear if small isps can get pi space, and the issue of multi-homing is central to the discussion of this issue, and routing table growth is another vector here, perhaps this needs to be explored a bit more. randy
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