There is a problem in a local area network below today. It is not completely solved until now, first record the contents of today's investigation:
A LAN Section 10.33.147.201-10.33.147.220, the subnet mask is 255.255.255.192, of which 10.33.147.201 to 10.33.147.209 are a subnet A1, connected with a switch T1; 10.33.147.210 As a gateway, the router is R; 10.33.147.211 to 10.33.147.220 is a subnet A2, which is also connected in a switch T2. The switch T2 and the router R are in one floor, while T1 is in another building. The two switches are connected to the cable connection from T2 to T1, T1 with the router; the current failure is that the internal machine is connected, and the internal machine is also pass, but the A1 is not able to pass, and a serious packet loss occurs. In the middle of the debugging process, we replace the T2 switch optical module with a new one. Two networks can be pinged in two or two minutes after replacement, but it will not pass after a few minutes. There are four tailibs between the two switches, two spare, and the spare is also not possible, and the phenomenon is the same. In addition, the optical module of the switch T2 is unplugged and then reinserted. The two networks are not done, but the two networks can also be maintained for one or two times when the other switch T1 is turned off.
In addition, this A local area network is connected to B-B-LAN with optical fibers to connect to the router of the C local area network to interconnect A and C. On the basis of the above fault, A and C are also unable to communicate, but when the network line of one workstation of A2 does not pass directly to the LAN0 port of the router, the workstation in A is any machine and any machine in C. Connected. Once the switch T2 is connected to the router R, then the workstation is connected to the switch, and the communication is disconnected from C where the machine can access the address of the router A, which is gateway 10.33.147.210.
This kind of problem is very strange. I haven't solved it for a long time, waiting for tomorrow, try to replace the switch in A1 tomorrow. However, the communication T1 of the A1 A1 is independent of the communication of A2 and C in accordance with the reason. Viewing the internal configuration of the router is also normal. And we changed the E mouth, changed from E0 to E1, all did not use, don't know what to do.
