58 SunATM 3U CompactPCI Adapter Installation and User’s Guide • February 2001
Supporting Multiple Emulated LANson a Single Interface
The SunATMsoftware 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 SunATMadapter. You
can find the number of MAC addresses assigned to your SunATMadapter 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 andIP address,
ATMaddress, 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 -a output for a
system with one SunATMinterface, 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