5 elan join policies, Elan join policies -9, Best effort – Cabletron Systems 6500 User Manual

Page 57

SmartSwitch 6500 User Guide 3-9

IP Over ATM and LANE

Creating an Emulated LAN

On switch SW1, use the command

add lecselan

to create the LECS:

SW1 # add lecselan

ELANNumber(0) : 1

ELANName(ELAN001) : mis1

LESAddress(39:00:00:00:00:00:00:00:00:00:A3:87:0B:00:00:1D:A3:87:0B:03):39:00:00:00:00:00:00:00:0

0:00:14:41:80:00:20:d4:14:41:81:02

< Specify the LES address on SW2

ELANType(802.3) :

MTU(1516) :

TLVSet() :

SW1 #

Use the

add laneclient

command on SW1 to add a client to the ELAN:

SW1 # add laneclient

ClientNumber(0) : 1

LanName(ELAN001) : mis1

ServerType(LECS) :

ServerAddress() :

IPAddress() : 90.1.1.22

< This IP address is for example only

NetMask(255.0.0.0) : 255.255.255.0

< This subnet mask is for example only

MTU(1516) :

SW1 #

Use the

show client

command on SW1 to see that the client has reached all the distributed LANE

services and has successfully joined ELAN

mis1

SW1 # show client

ClientNumber(ALL) :

Client Type IP Address Server Type Server Conn Status

==============================================================================

1 LANE 90.1.1.22 LECS Established Operational

SW1 #

Notice in the example above that creating an ELAN with distributed services is a process of building from the bottom
up: First, the BUS is created so that its address can be specified to the LES. Next, the LES is created so that its address
can be specified to the LECS. Finally, the LECS is created.

If needed, all three ELAN services can exist on separate switches. For example, the BUS can exist on one switch (use
the

add buselan

command), the LES can exist on another switch (use the

add leselan

command), and the LECS can

exist on another switch (use the

add lecselan

command).

3.2.5

ELAN Join Policies

The SmartSwitch 6500 provides control over the assigning of clients to ELANs. Control is accomplished by ELAN
join policies. By default, the SmartSwitch 6500 has a single ELAN join policy defined —

Best Effort

. When a client

attempts to join LANE services, the SmartSwitch 6500 uses information provided by the client to performs the

Best

Effort

ELAN join test.