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hwc_vnsconfiguration.fm

Virtual Network configuration

Topology for a VNS

A31003-W1050-U100-2-7619,

March 2008

HiPath Wireless Controller, Access Points and Convergence Software V5 R1 , C20/C2400 User Guide 169

4. To save your changes, click Save.

6.3.1.4 Defining a next hop route and OSPF advertisement for

a VNS

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 main menu, click Virtual Network Configuration. The Virtual

Network Configuration page is displayed.

2. In the left pane Virtual Networks list, click the VNS you want to define a

next-hop route for. The Topology tab is displayed.

3. 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 this VNS to be directed.

4. 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 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 controller will be chosen as a route for

traffic, unless that controller is the only possible route for that traffic.

5. To disable OSPF advertisement on this VNS, select the disable OSPF

Advertisement checkbox.