48. How should a router that is being used in a Frame Relay network be configured to avoid split horizon issues
from preventing routing updates?
A. Configure a separate sub-interface for each PVC with a unique DLCI and subnet assigned to the sub-interface.
B. Configure each Frame Relay circuit as a point-to-point line to support multicast and broadcast traffic.
C. Configure many sub-interfaces on the same subnet.
D. Configure a single sub-interface to establish multiple PVC connections to multiple remote router interfaces.
Answer: A
解释:在frame-relay里面运行路由协议通常会出现两个问题,一个是frame-relay是NBMA网络,不支持广播和组播
而基本上大部分的路由协议都是通过广播和组播来传递他们的更新报文,所以我们可以通过在映射后面加
上broadcast参数来解决这个问题,通过反向ARP自动构建的MAP也会自动带上broadcast的参数,第二个问题
是水平分割的问题,而这个问题则是通过划分frame-relay点到点的子接口来解决.所以答案是A
本帖隐藏的内容需要回复才可以浏览