Visara CNA-8000 Planning Guide - Manual (Page 42)

Chapter 5. Migrating from 1174 or 3174
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Transitioning to the CNA-8000
Performing a simple replacement using the CNA-8000, the resulting diagram may appear
similar to the one below:
The CNA-8000 is populated with the same number of Ethernet and Token Ring
interfaces as the 1174-25S it is replacing so that none of the downstream clients will need
to be reconfigured. LLC and IP addressing will be made to match to achieve this goal.
Note that the CNA-8000 can easily support expansion of clients well beyond the numbers
that were supported by the 1174. If multiple 1174-25S platforms are being replaced, it
may be possible to provide consolidation of platforms at the same time.
Because the CNA-8000 uses XCA technology, the corresponding IO gen will be a little
different. It could be represented as shown below:
RESOURCE PARTITION=((PROD1,1))
CHPID PATH=(27),TYPE=CNC
CNTLUNIT CUNUMBR=2700,PATH=27,UNITADD=(00,3),UNIT=3172
IODEVICE CUNUMBR=2800,ADDRESS(800,3),UNIT=3172,UNITADD=00
The two major differences between this IO definition and that of the 1174 is the UNIT
type for the CNA-8000 requires a definition of 3172, and the number of subchannels
defined has been reduced from 14 to 3. Because the LLC (PU2) gateway feature must
talk to both Token Ring and Ethernet, a minimum of two XCA gateways will need to be
defined. In this case a third XCA gateway is being defined for the TN3270 Host Circuits
to keep them separate from the LLC downstreams, although this is not necessary since
they will actually be virtual connections appearing to be connected to any of the LAN
PU2.0 Controller
3000
TN3270 Clients
AS400/PU2.1
CNA-8000 Gateway
Z10 Host Processor
3x Ethernet
Interfaces