Dell PowerConnect W Clearpass 100 Software Betriebsanweisung PDF herunterladen (Seite 179)

AOS-W Instant 6.2.1.0-3.3| User Guide Mobility and Client Management | 179

Chapter 15

Mobility and Client Management

This chapter provides the following information:

l Layer-3 Mobility Overview on page 179

l Configuring L3-Mobility on page 180

Layer-3 Mobility Overview

OAW-IAPs form a single Instant network when they are in the same Layer-2 (L2) domain. As the number of clients

increase, multiple subnets are required to avoid broadcast overhead. In such a scenario, a client must be allowed to

roam away from the Instant network to which it first connected (home network) to another network supporting the

same WLAN access parameters (foreign network) and continue its existing sessions.

Layer-3 (L3) mobility allows a client to roam without losing its IP address and sessions. If WLAN access parameters

are same across these networks, clients connected to OAW-IAPs in a given Instant network can roam to APs in a

foreign Instant network and continue their existing sessions. Clients roaming across these networks are able to

continue using their IP addresses after roaming. You can configure a list of Virtual Controller IP addresses across

which L3 mobility is supported.

AOS-W Instant Layer-3 mobility solution defines a Mobility Domain as a set of Instant networks, with same WLAN

access parameters, across which client roaming is supported. The Instant network to which the client first connects

is called its home network. When the client roams to a foreign network, an AP in the home network (home AP)

anchors all traffic to or from this client. The AP to which the client is connected in the foreign network (foreign AP)

tunnels all client traffic to or from the home AP through a GRE tunnel.

Figure 59

Routing of traffic when the client is away from its home network

When a client first connects to an Instant network, a message is sent to all configured Virtual Controller IP

addresses to see if this is an L3 roamed client. On receiving an acknowledgement from any of the configured Virtual

1 2 ... 174 175 176 177 178 179 180 181 182 183 184 ... 295 296

Keine Kommentare

Dell PowerConnect W Clearpass 100 Software Betriebsanweisung Seite 179