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Configuring Topologies

Layer 3 Configuration

SCALANCE WLC711

4-10 C79000-G8976-C260-03, 07/2012, User Guide, V8.11

i. Click Close.

5. If you selected Use Relay, a DHCP window displays.

a. in the DHCP Servers box, type the IP address of the DHCP server to which DHCP

discover and request messages will be forwarded for clients on this VNS. The

SCALANCE IWLAN Controller does not handle DHCP requests from users, but instead

forwards the requests to the indicated DHCP server.

Note:

The DHCP Server must be configured to match the topology settings. In particular for Routed topologies, the

DHCP server must identify the SCALANCE IWLAN Controller's interface IP as the default Gateway (router)

for the subnet. (Users intending to reach devices outside of the subnet will forward the packets to the default

gateway (controller) for delivery upstream.)

6. To save your changes, click Save.

Defining a Next Hop Route and OSPF Advertisement

The next hop definition allows the administrator to define a specific host as the target for all

non-VNS targeted traffic for users in a VNS. The next hop IP identifies the target device to which

all VNS (user traffic) will be forwarded to. Next-hop definition supersedes any other possible

definition in the routing table.

If the traffic destination from a wireless device on a VNS is outside of the VNS, it is forwarded to

the next hop IP address, where this router applies policy and forwards the traffic. This feature

applies to unicast traffic only. In addition, you can also modify the Open Shortest Path First

(OSPF) route cost.

OSPF is an interior gateway routing protocol developed for IP networks based on the shortest

path first or link-state algorithm. Using OSPF, a host that obtains a change to a routing table or

detects a change in the network immediately distributes the information to all other hosts in the

network so that all will have the same routing table information. The host using OSPF sends only

the part that has changed, and only when a change has taken place.

To Define a Next Hop Route and OSPF Advertisement:

1. From the top menu, click VNS Configuration. The Virtual Network Configuration screen is

displayed.

2. In the left pane, expand the Topologies pane, then click the routed Topology you want to

define a next-hop route for.

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Siemens EF 711 Series Uživatelská příručka Strana 178