Supporting Multiple Emulated LANs on a Single Interface

The SunATM software allows a single ATM interface to join up to 16 emulated local area networks (ELANs), provided this is allowed by the switch and LAN Emulation (LANE) services. Each ELAN joined will be represented by a unique lane instance (for example, lane0 or lane1).

Note A requirement for supporting this feature is that the adapter card be assigned multiple MAC addresses, which is supported by the SunATM adapter. You can find the number of MAC addresses assigned to your SunATM adapter by using the atmgetmac(1M) command with the count option.

Configure multiple ELANs by placing multiple entries in the /etc/opt/SUNWconn/atm/atmconfig and /etc/opt/SUNWconn/atm/ laneconfig files. Each lane instance will have a unique hostname and IP address, ATM address, and MAC address associated with it. In addition, assign an ELAN name to the instance if any ELAN other than the default is to be joined. Provide this information, with the exception of the MAC address, which is retrieved from the board itself, in the /etc/opt/SUNWconn/atm/atmconfig and /etc/opt/ SUNWconn/atm/laneconfig configuration files.

Note Only one signalling protocol (for example, UNI 3.0 or 3.1) and one Classical IP instance are supported per physical interface. Specify the UNI version in the first /etc/opt/SUNWconn/atm/atmconfig entry for a given interface; the Classical IP instance may be specified in any entry.

The following example shows the /etc/opt/SUNWconn/atm/atmconfig and /etc/opt/SUNWconn/atm/laneconfig files and the ifconfig -aoutput for a system with one SunATM interface, ba0. The interface uses UNI 3.0 for signalling, and does not run Classical IP. It joins four emulated LANs: the default, elan1, elan2, and elan3.

The example /etc/opt/SUNWconn/atm/atmconfig file:

Interface

UNI

CIP Hostname

LANE Instance LANE Hostname

ba0

3.0

-

0

atm0

ba0

-

-

1

atm1

ba0

-

-

2

atm2

ba0

-

-

3

atm3

 

 

 

 

 

58 SunATM 3U CompactPCI Adapter Installation and User’s Guide • February 2001

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Sun Microsystems 3U Supporting Multiple Emulated LANs on a Single Interface, Example /etc/opt/SUNWconn/atm/atmconfig file