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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical RE: Route table growth and hardware limits...talk to the filter
> > what i think it boils down to is that many folks seem to run default-free > > because they can, because its cool, because its what tier-1 folks do, > because > > (insert cool/uber reason why here), but not necessarily because they HAVE > TO. > > Consider a regional or local ISP providing BGP to a customer. The > customer also has a connection to a "Tier 1". The customer may start > asking questions when they notice they get 250k routes from one provider > and only 50k to 80k less routes from you. It is all in the education. Educated right, you could claim that you're providing a superior service by _filtering_ what announcements you accept. better yet, you can claim that you're saving the customer money - THEY don't have to invest in more RAM / larger routers / larger TCAMs. OR, money dynamics will be that you charge a higher price for customers that want a 'full feed' with the higher price based on the higher price you have to pay to run a default-free network. the reality is that for many end customers (even multi-homed ones), receiving a 'default' route from an upstream rather than a ton of more-specific routes is perfectly acceptable. they can filter out that 0/0 if they don't want it, otherwise "things still work" if they accept it. in short: it is a MYTH that folks THINK they NEED a full routing table. most folks don't. cheers, lincoln.
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