Differences

This shows you the differences between two versions of the page.

--- peering-toolbox:where-to-peer [2023/03/27 18:37] – [Physical Connection] philip
+++ peering-toolbox:where-to-peer [2023/03/27 18:57] – [Public Peering / Internet Exchange Point] philip
@@ Line 19: / Line 19: @@
   * [[where-to-peer#when_to_consider|When to consider]]
   * [[where-to-peer#location|Location]]
+  * [[where-to-peer#sizing|Sizing]]
   * [[where-to-peer#physical_connection|Physical Connection]]
   * [[where-to-peer#configuration|Configuration]]
@@ Line 41: / Line 42: @@
 (NEW)
-Sizing of capacity from one operator to another is critically important to ensure that money is not wasted either over-provisioning or under-provisioning.
+Sizing of capacity from one operator to another for a private peering is critically important to ensure that money is not wasted either over-provisioning or under-provisioning.
-Over-provisioning is usually preferred but comes at a cost, usually for physical infrastructure and any port charges.
+**Over-provisioning** is usually preferred but comes at a cost, usually for physical infrastructure and any port charges. Advice from experienced operators is usually to provision enough capacity to allow for growth over at least the next 2 years - longer is better if there isn't a cost implication.
+**Under-provisioning** is incredibly risky and is usually a very expensive mistake by any network operator, especially if the infrastructure has been difficult to procure and implement in the first place. It is strongly recommended to be avoided. It is not a good cost saving strategy!
+As a general guideline, private peering link capacity is usually measured in multiples of the physical infrastructure available. For example, today, links in many parts of the Internet are counted in multiples of 10Gbps. The physical link may be 10Gbps even if the peering traffic may only be 1Gbps to 2Gbps. Indeed, provisioning two 1Gbps links for a private peering might well be considerably more expensive than provisioning a single 10Gbps link, even when port and optical transceiver cost is taken into account.
 ==== Physical Connection ====
@@ Line 86: / Line 91: @@
 ===== Public Peering / Internet Exchange Point =====
-Public peering is where there is a public interconnect location where network operators can interconnect for the purpose of exchanging traffic. This public interconnect is known as an **Internet Exchange Point**. The following topics cover the aspects needed in any Public Peering setup.
+Public peering is where there is a public interconnect location where network operators can interconnect for the purpose of exchanging traffic. This public interconnect is known as an [[:peering-toolbox/what-is-peering/what_is_an_internet_exchange_point|Internet Exchange Point]]. The following topics cover the aspects needed in any Public Peering setup.
   * [[where-to-peer#meaning1|Meaning]]
   * [[where-to-peer#when_to_consider1|When to consider]]
   * [[where-to-peer#location1|Location]]
+  * [[where-to-peer#sizing1|Sizing]]
   * [[where-to-peer#physical_connection1|Physical Connection]]
   * [[where-to-peer#configuration1|Configuration]]
@@ Line 112: / Line 118: @@
 Given the large concentration of network operators present, these public interconnects are often considered critical infrastructure, and their reliable operation is often considered of national importance.
+==== Sizing ====
+(NEW)
+Sizing of capacity from an operator to an IXP is critically important to ensure that money is not wasted either over-provisioning or under-provisioning.
+**Over-provisioning** is usually preferred but comes at a cost, usually for physical infrastructure and any port charges. Advice from experienced operators is usually to provision enough capacity to allow for growth over at least the next 2 years - longer is better if there isn't a cost implication.
+**Under-provisioning** is incredibly risky and is usually a very expensive mistake by any network operator, especially if the infrastructure has been difficult to procure and implement in the first place. It is strongly recommended to be avoided. It is not a good cost saving strategy!
+As a general guideline, peering link capacity is usually measured in multiples of the physical infrastructure available. For example, today, links in many parts of the Internet are counted in multiples of 10Gbps. The physical link may be 10Gbps even if the IXP traffic may only be 1Gbps to 2Gbps. Indeed, provisioning two 1Gbps links to an IXP might well be considerably more expensive (and harder to implement BGP and routing policies to get equal link utilisation) than provisioning a single 10Gbps link, even when port and optical transceiver cost is taken into account.
 ==== Physical Connection ====