10.4. Configuring Preference for Link-Local Addresses (配置链路本地地址偏好)

10.4. Configuring Preference for Link-Local Addresses (配置链路本地地址偏好)

目标地址选择规则偏好较小范围的目标。例如, 当两者在其他方面同样适用时, 链路本地目标将在全局范围目标之前排序。管理员可以更改策略表以反转此偏好, 并在链路本地目标之前对全局目标进行排序:

   Prefix        Precedence Label
   ::1/128               50     0
   ::/0                  40     1
   ::ffff:0:0/96         35     4
   fe80::/10             33     1
   2002::/16             30     2
   2001::/32              5     5
   fc00::/7               3    13
   ::/96                  1     3
   fec0::/10              1    11
   3ffe::/16              1    12

对默认策略表的此更改产生以下行为:

Candidate Source Addresses: 2001:db8::2 or fe80::2
Destination Address List: 2001:db8::1 or fe80::1
New Result: 2001:db8::1 (src 2001:db8::2) then fe80::1 (src fe80::2) (prefer higher precedence)

Candidate Source Addresses: 2001:db8::2 (deprecated) or fe80::2
Destination Address List: 2001:db8::1 or fe80::1
Unchanged Result: fe80::1 (src fe80::2) then 2001:db8::1 (src 2001:db8::2) (avoid deprecated addresses)