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ASN32 vs bgp confederations

RFC4893(п.3) гласит:

To prevent the possible propagation of confederation path segments outside of a confederation, the path segment types AS_CONFED_SEQUENCE and AS_CONFED_SET [RFC3065] are declared invalid for the AS4_PATH attribute.

 

Т.е. получается, что bgp-конфедерации могут работать только при использовани 2-байтных AS? Или я что-то недопонимаю?

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да. обычно для sub-ASN используют "серые" номера 64512 - 65535

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