Static users in different address pools of MA5200 cannot interact, but those in the same address pool could; also, the users in different C segments could intercommunicate. Only one C network segment is divided into multiple address pools, and the users in the address pools cannot access each other.
1. No ACL is configured to restrict the mutual access between users.
2. The routing table of MA5200 works well, and the users could access network, indicating that both equipment and route are normal.
3. After the checkup for the setting of IP address of PC, the mask is found as 255.255.255.0, but the mask of address pool is less than 24-bit, causing the users to be in different network segments(different sub-nets), even the failure in intercommunication because of L2 forwarding.
4.Synchronize the mask of IP address of PC with that of address pool, solving the problem.
The client is configured with static IP address, and the mask is set to 255.255.255.0. For the addresses in the whole C network segment, the client regards it as L2 forwarding. In fact, the C network segment at MA5200 is divided into multiple address pools (viz. multiple sub-network segments), and the packets that should be forwarded at L3 are forwarded at L2, so users fail to access mutually. For example: the C-network segment of 192.168.0.1/24 is set to 192.168.0.1/26, 192.168.0.65/26, 192.168.0.129/26, 192.168.0.193/26 at MA5200. The addresses for three static users are set as: "192.168.0.2/24, gateway192.168.0.1"(userA), "192.168.0.3/24, gateway 192.168.0.1"(user B), "192.168.0.66/24, gateway 192.168.0.65"(user C). When A accesses B, they are regarded in the same network segment, and A\B are in the same address pool, so they could communicate well. When A accesses C, A regards that it is in the same network segment with C; however, MA5200 configures both into different network segments, failing to learn the MAC address. Thus, A\C cannot access each other normally. Moreover, the users could access other C-network segment through L3 forwarding. This is the symptoms described in Phenomenon Description.