关于Hurricane Electric Internet Services的详细使用解读

https://bgp.he.net/

AS Info:

        BGP Peers:与该AS直接相连的AS数量（分为Ipv4和Ipv6）

        Average AS Path Length: Average path length, or average shortest path length is a concept in network topology that is defined as the average number of steps along the shortest paths for all possible pairs of network nodes. It is a measure of the efficiency of information or mass transport on a network.

        IPv4 Peers pie chart:根据该AS去往指定AS的路径数量进行排序。这也体现在下图中线的粗细(thicknes)。

  Graph V4:

        Ipv4 AS中从该AS出发，此处只展示provider和peer，下文中将对此两单词进行解释。

 Peers V4:

        此表格展示所有与此AS直接相连的AS，不仅包含provider和peer，还包含customer。

 IX:

        此表格显式与该AS直接相连的Internet Exchange Point（交换节点）。

        点击链接可查看该IX点所连接的所有AS。其中肯定包含刚才使用的AS。

 

 Provider,Peer,Customer的区别：

AS Rank: A ranking of the largest Autonomous Systems (AS) in the Internet.

AS Rank : About

Although business agreements between ISPs can be complicated, the original model introduced by Gao 1 abstracts business relationships into the following three most common types:

1. customer-to-provider (c2p) (or if looked at from the opposite direction, provider-to-customer p2c),
2. peer-to-peer (p2p), and
3. sibling-to-sibling (s2s)

The justification for this classification is that an AS must buy transit services for any traffic destined to parts of the Internet that this AS neither owns nor can reach through its customers. In Figure 2, arrow directions reflect flows of money -- ASes at lower levels are customers who pay ISPs (providers) at higher levels in exchange for access to the rest of the Internet, also known as transit. We refer to links between a customer and a provider as c2p (p2c) links. 

A p2p link connects two ISPs who have agreed to exchange traffic on a quid pro quo basis. Peers should exchange traffic only between each other and each other's customers. Peering allows growing ISPs to save money on transit costs they would otherwise have to pay to deliver traffic to/from their customers. 

 排名高的AS一般是排名低的AS的provider。

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