网络工程 - BGP 隐式退出 - 吾爱随笔录

以下是 Wang 等人对隐式撤回的定义。在“应力下 BGP 行为的观察和分析”论文中。

我没有得到的是如何计算隐式提款？例如，如果我有下面显示的 4 条 BGP 消息，它们具有相同的 IP 地址和不同的 AS-PATH 属性，那么我有多少隐式提款？是3吗？还是6？在计算隐式撤回时，我是否只查看连续的消息，还是我查看第一条消息与其余消息，而不是第二条消息与其余消息有关，第三条消息与第四条消息有关？

如果我查看连续的消息，结果将是 3，如果我使用第二种方法，结果是 6。

请帮忙，珍妮

TIME: 2001-9-16 00:00:06
TYPE: BGP4MP/BGP4MP_MESSAGE AFI_IP
FROM: 192.65.185.144
TO: 192.65.185.40
BGP PACKET TYPE: UPDATE
ORIGIN: IGP
AS_PATH: 6893 8938 1 297
NEXT_HOP: 192.65.185.144
ANNOUNCED: 192.152.102.0/24

TIME: 2001-9-16 00:00:18
TYPE: BGP4MP/BGP4MP_MESSAGE AFI_IP
FROM: 192.65.184.3
TO: 192.65.185.40
BGP PACKET TYPE: UPDATE
ORIGIN: IGP
AS_PATH: 513 10764 6509 297
NEXT_HOP: 192.65.185.9
ANNOUNCED: 192.152.102.0/24

TIME: 2001-9-16 00:00:36
TYPE: BGP4MP/BGP4MP_MESSAGE AFI_IP
FROM: 192.65.185.144
TO: 192.65.185.40
BGP PACKET TYPE: UPDATE
ORIGIN: IGP
AS_PATH: 6893 3561 209 297
NEXT_HOP: 192.65.185.144
ANNOUNCED: 192.152.102.0/24

TIME: 2001-9-16 00:00:44
TYPE: BGP4MP/BGP4MP_MESSAGE AFI_IP
FROM: 192.65.185.130
TO: 192.65.185.40
BGP PACKET TYPE: UPDATE
ORIGIN: IGP
AS_PATH: 559 8933 6509 297
NEXT_HOP: 192.65.185.130
ANNOUNCED: 192.152.102.0/24


Implicit Withdrawal Definition:If the sender announces a route
to a previously unreachable address, this is a new
announcement. If the sender announces a route to
a currently reachable address and the new route is
identical to the current route, this is a duplicate
announcement. Otherwise, the sender is replacing
the current route with a new route and this is an
implicit withdrawal.