Cabletron Systems 6500 - Manual (Page 54)

3-6 SmartSwitch 6500 User Guide
Creating an Emulated LAN IP Over ATM and LANE
3.2.1 ATM Addressing for LAN Emulation
The SmartSwitch 6500 provides default formats for ATM addresses used by LAN emulation entities (local client,
LECS, LES, and BUS). The default formats are constructed as follows.
Default Netprefix
The default netprefix is constructed from
39 + nine zero bytes + last three bytes of chassis MAC address
For example, the chassis MAC address = 00:00:1D:A3:87:0B ,
then
default netprefix = 39:00:00:00:00:00:00:00:00:00:A3:87:0B
Default Client ATM Address
The default address for local clients is constructed from
netprefix + CPU MAC address with last byte summed with the client number + zero selector byte
For example
• netprefix = 39:00:00:00:00:00:00:00:00:00:A3:87:0B
• chassis MAC address = 00:00:1D:A3:87:0B,
• CPU MAC address = 00:20:D4:14:41:80 ,
• client number = 5
then,
client five’s default ATM address = 39:00:00:00:00:00:00:00:00:00:A3:87:0B:00:20:D4:14:41:85:00
Default LECS ATM Address
The default LECS address is constructed from
netprefix + chassis MAC address + selector byte of 01
For example
• netprefix = 39:00:00:00:00:00:00:00:00:00:A3:87:0B
• chassis MAC address = 00:00:1D:A3:87:0B
then,
default LECS address = 39:00:00:00:00:00:00:00:00:00:A3:87:0B:00:00:1D:A3:87:0B:01
Default LES and BUS ATM Addresses
By default, the LES and BUS have the same ATM address. The default LES and BUS addresses are constructed from