|
|
The Network Simulator provides the Topology editor to establish inter-connections across routers, switches and other network devices and visualize the topological relationship between the devices. You can connect new devices or disconnect existing devices in the topology.
The "Topology view" button is displayed in the top panel of the network area and is enabled when atleast one network is loaded in the network designer. Selecting the button, displays the topology panel with the router devices in the network, displayed on the left-side tree and the connection between the routers, displayed on the right.
Selecting a specific router in the left-side tree, displays the devices connected to the router. A panel containing a list of devices in the network, that are not connected to this router, is displayed on the right side. A combo box to filter the list of devices based on the ip address is also present.
You can toggle between the "Network view" and "topology view". When a new device is added to the network or any changes are made to the network, select the Refresh button available at the top right-corner of the Topology view, to refresh the devices.
Establishing Router to Router Connections
The Topology Editor enables you to create connections between the router devices in the network or disconnect existing connections between the routers.
To create connections between routers,
Select the "Routers" node in the left-side tree. The existing router topology will be displayed on the right-side.
To connect a router to another router, right-click on the router and select "Connect to". The ipaddress of the other routers in the network will be listed.
Select the ipaddress of the router to which the connection must be established and click OK. The connection between the two routers will be created.
To disconnect the connection, right-click on the router device and select Disconnect.
Establishing Router to Device Connections
To connect a new device to the router,
Select a router from the left-side tree. The topology of the devices connected to the router are displayed with the interconnection lines displayed between the devices.
To connect a new device, drag and drop the device from the right-side frame, to the router/switch.
|
|
Note: When a Router/Host is connected to switch port, the MAC Address of the Routers(Interface) / Host will be updated in the dot1dTpFdbTable of the switch. |
Right-click on a device in the topology and select Disconnect. When a device is disconnected, the IpNetToMediaTable (OID: ".1.3.6.1.2.1.4.22") is updated.
|
|
Note: When a switch is disconnected, the devices connected to the switch will not be disconnected. |
The MIB data used in the Topology Editor is given below:
The ipaddress of the devices connected to a router/switch is updated in the RFC1213-MIB -> IpNetToMediaTable with OID ".1.3.6.1.2.1.4.22".
The MAC address of the Routers/Host device connected to a switch, will be updated in the dot1dTpFdbTable of the switch.
The interface details of the routers are displayed from the RFC1213-MIB -> IfTable with OID ".1.3.6.1.2.1.2.2.1.2"
The port details of the switch device are displayed from Bridge MIB -> dot1dBasePortTable with OID ".1.3.6.1.2.1.17.1.4".
|
|
