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This soft copy for use by IBM employees only.
Specify the maximum number of LECs supported by the designated
LES/BUS. The maximum number is 128 and is the sum of both
LES/BUSes when two LES/BUSes are configured.
− Maximum SDU Size
Specify the maximum AAL-5 service data unit (SDU) size supported by
the designated LES/BUS. The SDU is the information part of AAL-5
protocol data unit (PDU). The possible values are 1516, 4544, 9234 and
18190 (default: 1516) regardless the ELAN type.
Note
On a real Ethernet network, the maximum data frame length is 1492
or 1500 bytes. However, up to 18190-byte frames are supported on an
ELAN as stated above. You may know the inconsistency with the
length field in an IEEE 802.3 frame which should be less than 1536
(X′0600′). But the inconsistency is resolved on the the IEEE 802.3
LANE by placing the value 0 in the length field when the IEEE 802.3
LANE frame is longer than 1536.
On the other hand, you must specify 1516 for the maximum SDU size
when your ATM network attached to a real Ethernet network via an
ATM bridge which doesn′t have fragment capability.
− ELAN Name
Specify the Emulated LAN name. The default value is
IBM_lantype_LANn, with lantype set to ETHERNET or TOKEN_RING based
on the ELAN type, and n set to 1 or 2 based on the server ID. For
example, the default ELAN name for the Ethernet LES/BUS with server ID
1 is IBM_ETHERNET_LAN1.
•
LEC Parameters
The integrated LEC function supports the TCP/IP protocol over
Forum-Compliant LAN Emulation and provides a node management interface
to a Telnet station or to a SNMP manager.
To configure the LEC, use the SET DEVICE LAN_EMULATION_CLIENT
command with the following parameters:
− ELAN Type
Specify the ELAN type to which the LEC belongs. The valid options are
ETH (Ethernet LANE) or TR (token-ring LANE).
− Ethernet Type
Specify the Ethernet type when the ELAN type is Ethernet. The default
setting is 802.3 and the Ethernet type should be the same as the
communicating device. Note that there are many devices that have the
other Ethernet type (DIX/Ethernet V2) as the default.
− IP Address
The IP address to be assigned to the switch. This must be unique. And
if the IBM 8285 is configured with multiple IP addresses, they have to be
on different IP networks because they are treated as the IP interfaces of
an IP node.
Chapter 7. IBM 8285 Configuration 133