document/ccna60d
2
0
Fork 0
mirror of https://github.com/gnu4cn/ccna60d.git synced 2024-05-21 04:55:00 +08:00
Code Issues Packages Projects Releases Wiki Activity

Daily update. 2017-07-16 17:36:11

Browse Source
This commit is contained in:
Peng Hailin
2017-07-16 17:36:11 +08:00
parent dea0bf3251
commit d68931cb38
1 changed files with 4 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
d38-EIGRP-For-IPv6.md
View File

@@ -45,4 +45,8 @@ EIGRPv6保留了EIGRPv4中的大部分相同基础的核心功能（For the most
尽管EIGRPv4与EIGRPv6的开启有些类似，但在两个路由进程开启之后的协议状态中，是有着非常显著的不同的。默认在开启了EIGRPv4时，该协议就自动启动，并在其假定有桌正确配置的情况下，开始在所有指定的运作接口上发送Hello数据包。而当在思科IOS软件中启用EIGRPv6时，默认情况下在该协议被开启后，其将保持关闭状态。这就意味着就算在某些指定接口下得以开启，在执行路由器配置命令`no shutdown`之前，EIGRP进程仍不是运作中的（While enabling EIGRPv4 and EIGRPv6 is somewhat similar, there is a very notable and significant difference in the protocol states once the routing process has been enabled. By default, when EIGRPv4 is enabled, the protocol automatically starts and, assuming correct configuration, begins sending Hello packets on all specified interfaces. When enabling EIGRPv6 in Cisco IOS software, by default, after the protocol has been enabled, it remains in the shutdown state. This means that even if enabled under specified interfaces, the EIGRP process will not be operational until the `no shutdown` router configuration command is issued）。
而EIGRPv4与EIGRPv6的另一配置差异，就是在EIGRPv6下，路由器ID是强制要求的，且必须以IPv4的点分十进制表示法进行指定。在分配RID时，要记住该地址不必是一个可路由或可达的地址（Yet another configuration difference between EIGRPv4 and EIGRPv6 is that with EIGRPv6, the router ID is mandatory and must be specified in IPv4 dotted-decimal notation. When assigning the RID, keep in mind that the address does not have to be a routable or reachable address）。
> **注意：** 如在本地路由器上有任何配置了IPv4地址的接口，那么该路由器将从这些接口选取路由器ID -- 优先选取环回接口，在路由器上没有配置环回接口或环回接口不可运作时，就使用物理接口。在有环回接口运行时，将选取环回接口IP地址中最高的作为RID。在没有环回接口运行，而有物理接口运行时，就选择物理接口IP地址中最高的作为RID。在路由器上环回接口与物理接口都没有配置时，就必须使用`eigrp router-id [IPv4 Addresses]`命令，指定出一个RID（If there are any interfaces with IPv4 address configured on the local router, then the router will select the router ID from these interfaces -- preferring Loopback interfaces, and then using physical interfaces if no Loopback interfaces are configured or operational on the router. The highest IP address of the Loopback interface(s), if up, will be selected. If not, the RID will be selected from the highest IP address of the physical interfaces, if up. If neither is configured on the router, the `eigrp router-id [IPv4 Address]` command must be used）。