Brocade Mobility RFS Controller System Reference Guide (Supporting software release 5.5.0.0 and later) - Manual (Page 357)

Brocade Mobility RFS Controller System Reference Guide 345
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Chapter
7
Network Configuration
Controllers, service platforms and Access Points allow packet routing customizations and route
resources be defined for deployment specific routing configurations.
For more information on the options available, refer to the following:
• L2TP V3 Configuration
• AAA Policy
• AAA TACACS Policy
• Network Alias
L2TP V3 Configuration
L2TP V3 is an IETF standard used for transporting different types of layer 2 frames in an IP
network. L2TP V3 defines control and encapsulation protocols for tunneling layer 2 frames
between two IP nodes.
Use L2TP V3 to create tunnels for transporting layer 2 frames. L2TP V3 enables Brocade wireless
devices to create tunnels for transporting Ethernet frames to and from bridge VLANs and physical
ports. L2TP V3 tunnels can be defined between Brocade devices and other vendor devices
supporting the L2TP V3 protocol.
Multiple pseudowires can be created within an L2TP V3 tunnel. Brocade Access Points support an
Ethernet VLAN pseudowire type exclusively.
NOTE
A pseudowire is an emulation of a layer 2 point-to-point connection over a packet-switching network
(PSN). A pseudowire was developed out of the necessity to encapsulate and tunnel layer 2 protocols
across a layer 3 network.
Ethernet VLAN pseudowires transport Ethernet frames to and from a specified VLAN. One or more
L2TP V3 tunnels can be defined between tunnel end points. Each tunnel can have one or more
L2TP V3 sessions. Each tunnel session corresponds to one pseudowire. An L2TP V3 control
connection (a L2TP V3 tunnel) needs to be established between the tunneling entities before
creating a session.
For optimal pseudowire operation, both the L2TP V3 session originator and responder need to
know the psuedowire type and identifier. These two parameters are communicated during L2TP V3
session establishment. An L2TP V3 session created within an L2TP V3 connection also specifies
multiplexing parameters for identifying a pseudowire type and ID.
The working status of a pseudowire is reflected by the state of the L2TP V3 session. If a L2TP V3
session is down, the pseudowire associated with it must be shut down. The L2TP V3 control
connection keep-alive mechanism can serve as a monitoring mechanism for the pseudowires
associated with a control connection.