Siemens EF 711 Series Guia do Utilizador descarregar pdf (Página 179)

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Configuring Topologies

Exception Filtering

SCALANCE WLC711

User Guide, V8.11, 07/2012, C79000-G8976-C260-03 4-11

3. In the Layer 3 area, click the Configure button. The DHCP configuration dialog window

displays.

4. In the Next Hop Address box, type the IP address of the next hop router on the network

through which you wish all traffic on the VNS using this Topology to be directed.

5. In the OSPF Route Cost box, type the OSPF cost of reaching the VNS subnet.

The OSPF cost value provides a relative cost indication to allow upstream routers to calculate

whether or not to use the SCALANCE IWLAN Controller as a better fit or lowest cost path to

reach devices in a particular network. The higher the cost, the less likely of the possibility that

the SCALANCE IWLAN Controller will be chosen as a route for traffic, unless that

SCALANCE IWLAN Controller is the only possible route for that traffic.

6. To disable OSPF advertisement on this VNS, select the Disable OSPF Advertisement

checkbox.

7. Click Close.

8. To save your changes, click Save.

Exception Filtering

The exception filter provides a set of rules aimed at restricting the type of traffic that is delivered

to the controller. By default, your system is shipped with a set of restrictive filtering rules that help

control access through the interfaces to only those services that are absolutely necessary.

By configuring to allow management on an interface, an additional set of rules is added to the

shipped filter rules that provide access to the system's management configuration framework

(SSH, HTTPS, SNMP Agent). Most of this functionality is handled directly behind the scenes by

the system, rolling and un-rolling canned filters as the system's topology and defined access

privileges for an interface change.

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