
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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