peering-toolbox:internet_resources
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peering-toolbox:internet_resources [2022/08/26 15:54] – [Reserved & Unallocated ASNs] philip | peering-toolbox:internet_resources [2023/04/30 15:36] (current) – [Reserved & Unallocated ASNs] philip | ||
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As with IP address space, each RIR has developed their own policies about the distribution of ASNs. But the overall concept is that if an entity needs to connect to more than one other independent network, an ASN is granted. Connecting to more than on other network means that a dynamic routing protocol is required (to make choices between the two available paths), and that protocol is BGP which requires an ASN to function. | As with IP address space, each RIR has developed their own policies about the distribution of ASNs. But the overall concept is that if an entity needs to connect to more than one other independent network, an ASN is granted. Connecting to more than on other network means that a dynamic routing protocol is required (to make choices between the two available paths), and that protocol is BGP which requires an ASN to function. | ||
- | AS numbers for use on the public Internet range from 1 through to 458751 (with exceptions for documentation, | + | AS numbers for use on the public Internet range from 1 through to 458751 (with exceptions for documentation, |
==== Using ASNs ==== | ==== Using ASNs ==== | ||
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==== Reserved & Unallocated ASNs ==== | ==== Reserved & Unallocated ASNs ==== | ||
- | There are also ASNs reserved for special uses. And remaining ASNs are still held by the IANA for future purposes yet to be determined. | + | There are also ASNs reserved for special uses. And remaining ASNs are still held by the IANA for future purposes yet to be determined. These ASNs also must not appear on the public Internet and are blocked by several network operators as per MANRS advice and by operational best practices. |
- | The complete | + | These ASNs are 0, 23456, 65535, 65552-131071, |
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+ | Note that some ASNs in the ranges for use on the public Internet are also reserved, pending delegation to the RIRs, or assignment by the RIRs to members. | ||
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+ | ==== Public Documentation of ASN Assignments ==== | ||
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+ | The complete | ||
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+ | A useful summary of the assignment ranges is shown in this table: | ||
< | < | ||
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</ | </ | ||
- | The complete list of ASNs is documented on the [[https:// | ||
- | [[: | + | [[: |
peering-toolbox/internet_resources.1661493274.txt.gz · Last modified: 2022/08/26 15:54 by philip