Differences

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--- peering-toolbox:internet_resources [2022/08/26 15:52] – [Background] philip
+++ peering-toolbox:internet_resources [2023/04/30 15:36] (current) – [Reserved & Unallocated ASNs] philip
@@ Line 103: / Line 103: @@
 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, private use, and those reserved between 65552 and 131071). ASNs from 458752 up to 4199999999 are reserved, with the remainder of the range above that intended for private use as well. The Internet Assigned Numbers Authority documents the [[https://www.iana.org/assignments/as-numbers/as-numbers.xhtml|ASN ranges]] in use today.
+AS numbers for use on the public Internet range from 1 through to 458751 (with exceptions for documentation, private use, and those reserved between 65552 and 131071). ASNs from 458752 up to 4199999999 are reserved, with the remainder of the range above that intended for private use as well.
 ==== Using ASNs ====
@@ Line 126: / Line 126: @@
 ==== ASNs for Documentation ====
-Two ASN ranges have been reserved for documentation purposes, for example like on this Toolbox site, or in presentations, or training courses etc, so that public ASN space is not used (in case of confusion with real live deployments).
+Two ASN ranges have been [[https://www.rfc-editor.org/rfc/rfc5398.html|reserved for documentation]] purposes, for example like on this Toolbox site, or in presentations, or training courses etc, so that public ASN space is not used (in case of confusion with real live deployments).
 These ranges are 64496-64511 and 65536-65551.
@@ Line 132: / Line 132: @@
 ==== Reserved & Unallocated ASNs ====
-There are also ASNs reserved for documentation, some for special uses, and the rest 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 range of ASNs is below:
+These ASNs are 0, 23456, 65535, 65552-131071, 458752-4199999999, and 4294967295.
+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.
+==== Public Documentation of ASN Assignments ====
+The complete list of ASNs is documented on the [[https://www.iana.org/assignments/as-numbers/as-numbers.xhtml|IANA AS assignments]] web page.
+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://www.iana.org/assignments/as-numbers/as-numbers.xhtml|IANA AS assignments]] web page.
-[[:peering-toolbox/how-to-peer| Back to "What I need to Peer" page]]
+[[:peering-toolbox/how-to-peer| Back to "What is required for Peering" page]]