网络工程 - EIGRP 故障转移 - 我如何验证它是否发生？ - 吾爱随笔录

我有 2 个指向目的地的链接，并且已设置 EIGRP。较快的链路是后继链路，较慢的链路是可行后继链路。

Switch1#show ip eigrp topology  192.168.1.0
EIGRP-IPv4 Topology Entry for AS(100)/ID(192.168.14.18) for 192.168.1.0/24
  State is Passive, Query origin flag is 1, 1 Successor(s), FD is 3072
  Descriptor Blocks:
  192.168.14.17 (GigabitEthernet1/0/10), from 192.168.14.17, Send flag is 0x0
      Composite metric is (3072/2816), route is Internal
      Vector metric:
        Minimum bandwidth is 1000000 Kbit
        Total delay is 20 microseconds
        Reliability is 255/255
        Load is 1/255
        Minimum MTU is 1500
        Hop count is 1
        Originating router is 192.168.14.10
  192.168.14.2 (GigabitEthernet2/0/13), from 192.168.14.2, Send flag is 0x0
      Composite metric is (28416/2816), route is Internal
      Vector metric:
        Minimum bandwidth is 100000 Kbit
        Total delay is 110 microseconds
        Reliability is 255/255
        Load is 1/255
        Minimum MTU is 1500
        Hop count is 1
        Originating router is 192.168.14.10

q1) 我能否确认，如果后继邻居的“保持时间”结束，可行后继将自动成为继任者吗？

q2) 我昨天遇到一个事件，继任者下台了一段时间，但我不确定可行的继任者是否真的接手了。当我登录查看时，后继者已经恢复。

我在日志中看到的只是继任者的持有时间到期

001275: Sep 25 02:09:08: %DUAL-5-NBRCHANGE: EIGRP-IPv4 100: Neighbor 192.168.14.17 (GigabitEthernet1/0/10) is down: holding time expired
001276: Sep 25 02:18:35: %DUAL-5-NBRCHANGE: EIGRP-IPv4 100: Neighbor 192.168.14.17 (GigabitEthernet1/0/10) is up: new adjacency

我不知道可行的继任者是否真的成为了继任者（即使只是暂时的）。

当一个可行的后继者成为一个后继者时，是否会产生任何日志？