NP 642-813 第146题

ysy118

题干如下

Refer to the exhibit. HSRP has been configured and Link A is the primary route to router R4. When Link A
fails, router R2 (Link B) becomes the active router. Which router will assume the active role when Link A
becomes operational again?
A. The primary router R1 will reassume the active role when it comes back online
B. The standby router R2 will remain active and will forward the active role to router R1 only in the event of
its own failure
C. The standby router R2 will remain active and will forward the active role to router R1 only in the event of
Link B failure
D. The third member of the HSRP group, router R3, will take over the active role only in event of router R2
failure


题库答案是A

我的理解是Link A fails, R1的S0就down了，那priority就是105-10=95。这样的话不就比R2的优先级100低了么？为什么会直接抢过来了呢？

难道是link fail 不等于 接口down么？

kgdpgf

R1 的link A重新变为活动时，优先级肯定变成105了，并且抢占模式，所以选A  

工作狗

看来楼主是没读懂题，题目问的是linkA好了之后哪个会成为active。既然开了抢占那就还是A咯

ysy118

kgdpgf 发表于 2014-9-6 19:08
R1 的link A重新变为活动时，优先级肯定变成105了，并且抢占模式，所以选A

谢谢！

Mrserious

开启了抢占后，优先级恢复105，选A ，楼主什么时候考啊？

ysy118

Mrserious 发表于 2014-9-8 15:51
开启了抢占后，优先级恢复105，选A ，楼主什么时候考啊？

已经考过了 989 题库很稳

Mrserious

ysy118 发表于 2014-9-14 20:57
已经考过了 989 题库很稳

我也过了  满分pass