Token Ring was designed to be fault tolerant and does a good job when all the computers
within this topology are configured and act correctly. If one network interface card
(NIC) is working at a different speed than the others, the whole ring can be affected and
traffic may be disrupted. Also, if two systems have the same MAC address, the whole
network can be brought down. These issues need to be considered when maintaining
an existing network. If an engineer is installing a NIC on a Token Ring network, she
should ensure it is set to work at the same speed as the others and that there is no possibility
for duplicate MAC addresses.
1、
速率必需一致
 
2、
不能有重复地址