Cabletron Systems 04-0053-01 Manual De Usuario

2-12   SmartSwitch ATM User Guide

Creating an Emulated LAN

  IP Over ATM and LANE

If the default ELAN (ELAN 0) has been deleted, the client is dropped.

By using ELAN join policies, clients attempting to join LANE services can be assigned to specific ELANs. Table 2-1 
lists the ELAN join policies that can be configured on an ATM SmartSwitch.

For detailed information on each of the commands that ELAN join policies 
interacts with, see the command descriptions in the SmartSwitch ATM Reference 
Manual.

You can give each ELAN join policy a priority value to determine its hierarchy among other ELAN join policies. If 
you define several ELAN join policies, the policy with the greatest priority value is tried first. If that policy fails, the 
policy with the next greatest priority value is attempted, and so on. ELAN join policies with the same priority value 
are ANDed together. For example, if three join policies are create, each with the same priority value, a client requesting 
LANE services must meet the criteria of all three policies to be assigned an ELAN. If the client fails to meet the 
requirements of all three policies, the policy with the next lowest priority value will attempt to assign the client to an 
ELAN.

Table 2-1

ELAN Join Policies

1

Best Effort

Default ELAN policy. Checks configuration information stored by the 

 command and during ELAN creation (

 command).

2

By ATM Address

Checks configuration information stored by the 

 command.

3

By MAC Address

Checks configuration information stored by the 

 command.

4

By Route Descriptor

Checks configuration information stored by the 

 command.

5

By LAN Type

Checks configuration information stored during ELAN creation (

 

command).

6

By Packet Size

Checks configuration information from the 

 command.

7

By ELAN Name

Checks configuration information stored by the 

 

command.