Topology: AR28-11(LNS)--MA5200(LAC). AR28-11 is at VRP3.4-0015.
Symptom: AR28-11 fails to set up L2TP connection with MA5200.
1.Configure undo ip pool command in system domain.
2. Add IP POOL in system view.
After these configurations, L2TP tunnel set up normally.
AR28-11 acts as LNS of L2TP, and no authentication is configured in virtual template; IP POOL is configured in the default system domain, failing the L2TP connection.
For routers at VRP3.4-0015, the attentions should be paid to the IP POOL configuration of L2TP: at LNS side, if virtual template is not configured with authentication, IP POOL must be configured in system view; if the virtual template is configured with authentication, IP POOL must be configured in the relevant domain.