The Long and Winding Road wrote: [snipped] > > area 0 range 172.16.1.0 255.255.255.0 area not working on ABR > either > > > > CL: well, area 0 range is an illegal command. you may be able > to enter it, > but it does nothing. the area range command is design to > summarize non > backbone routes into the backbone. if you think aout it, there > is probably > not a real good reaso for backbone routes to be summarized > > JMcL: Since when?? I use the area 0 range blah blah command (without the "area" at the end, if that was supposed to be part of the command above), and it certainly doesn't do nothing. As far as I've seen, it works in exactly the same way as area anything else range blah blah. Why not summarise backbone routes for the same reasons as summarising non-backbone routes - reduce routing tables, database sizes, route change propagations etc?
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