Timeline for Do I understand IP Routing correctly?
Current License: CC BY-SA 3.0
6 events
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| Jan 16, 2017 at 14:06 | comment | added | Alnitak |
@Jansky a typical customer edge router, assuming a single uplink, only needs one route for 0.0.0.0/0 on IPv4, aka the "default route". An ISP core router needs to support several 100k routes, one for each prefix advertised by every other ASN in the global routing table.
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| Jan 16, 2017 at 14:02 | vote | accept | Jansky | ||
| Jan 16, 2017 at 14:02 | comment | added | Jansky | Thanks for the answer. It really clears things up. I find it hard to imagine, but I suppose the routers must have massive amounts of routes then. Obviously they don't store every address of every network, so I presume they store the address prefixes of the different ASes and the path to them? Though even then there's tens of thousands. Then the AS gateway knows the path to the local network? | |
| Jan 16, 2017 at 13:48 | history | edited | Alnitak | CC BY-SA 3.0 |
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| Jan 16, 2017 at 13:27 | history | edited | Alnitak | CC BY-SA 3.0 |
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| Jan 16, 2017 at 13:17 | history | answered | Alnitak | CC BY-SA 3.0 |