For government network with our routers, internal users of the county site can realize mutual access through host name (LAN), but different county sites cannot (different network and it is forwarded through the router. The server of users must pass host address and then work (special application system).
1. The host of county site and that of other county site can ping through IP address and the delay is normal. The link and the forwarding is normal.
2. Capture packet on the host of county site. When the host is online, it will be registered on WINS server of county site. When we ping one host name, first DNS resolution; if it cannot be resolved, it can be checked through NBNS. The same county site can check, but different county sites cannot. Internal users of county site can mutually access through host name, but different county sites cannot. Add table (change hosts file), i.e. add corresponding relation between host address of different county sites and host name at C:\windows\system32\drivers\etc\hosts and then the problem can be solved.
1. The link is problematic.
2. The forwarding is problematic.
3. The host is problematic.