[address-policy-wg] 2006-05 New Policy Proposal (PI Assignment Size)
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Max Tulyev
president at ukraine.su
Wed Sep 20 20:32:33 CEST 2006
Gennady Abramov wrote: > On Wed, Sep 20, 2006 at 06:03:09PM +0000, Max Tulyev wrote: >> Gennady Abramov wrote: >>> And, don't forget that you even can do multihoming without PI address >>> space, by multihoming of PA assigment (if LIR permitted it). >> Multihoming, but not backups. Because of some traffic will flow through >> [aggregated] LIR route if even link with LIR will be damaged. > It is very some traffic. > Some traffic flows on default gateway, even if you have BGP full view on > the router... :) > Normally, longest prefix has highest priority. If your > multihomed prefix doesn't exist in some part of Internet, you may have > troubles with connectivity with this part of Internet, don't looking PA > or PI addresses you uses. > In the case of PA specific, traffic from this part of Internet will flow > to aggregated route, and, if specific route would be found on next hops, > will go to specific route from this next hops. > In the case of PI, traffic will flow to default or will be dropped. > Anyway, if your prefix doesn't routed anywhere, it isn't normal > situation, don't depend of addresses u use. Good only in the theory ;) IRL some "wise" admins filters out more specific if there is less specific (? - as I can understand this). This means some part of Internet will be not accessible if there is no link between you and your LIR. -- WBR, Max Tulyev (MT6561-RIPE, 2:463/253 at FIDO)
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