How to solve the problem when the Ethernet interface of the router non-stop up-down?
1, Examine Ethernet interface working status. 2,Examine Ethernet interface connected equipment working status. Check whether both sides can work under the same way. If the automatically consultation configuration can not be successful, can change into the designated way. Q: Serial failure elimination mentality. A: 1, Analyze this port physic reason, examination method: use show interface command examine whether the physic signal is completely up, check whether the port link, interface type (V24/V35) and equipment is normal. 2,Analyze far-port physic reason, examination method: test whether each segment is normal working. 3,The examination method of interface parameters configuration: examine whether the configuration is normal, and use debug command of WAN protocol to confirm where the problem is.
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