Visara CNA-8000 Planning Guide User Manual
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CNA-8000 Migration and Planning Guide
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Q:
How many TN3270E clients are supported by the CNA-8000?
A:
The CNA-8000 supports up to 16,000 TN3270E clients. Up to 4,000 are
supported by the base software when the TN3270E gateway option is ordered.
Additional increments are allowed using software keys to bring the total sessions
to 8,000 or 16,000.
Q:
How many downstream PU2 platforms can be supported by the CNA-8000?
A:
The base software supports up to 2,000 DSPUs. These can be supported through a
single network interface or spread across multiple interfaces. A single software
upgrade key can be added to increase the total to 4,000. However, traffic
throughput requirements may reduce the practical number of DSPUs to a smaller
number.
Q:
How does the CNA-8000 support DLSw connections?
A:
The CNA-8000 supports an integrated DLSw capability through Ethernet. This
means that the encapsulation supported by DLSw occurs internally so that only IP
traffic is sent out over the network connections, and can be routed across the
network as needed. If using Token Ring, the traffic is not converted internally and
would require a DLSw capable router.
Q:
How do the remote SDLC connections appear to VTAM?
A:
SDLC connections appear as Switched Node definitions to VTAM. Each SDLC
drop corresponds to a Switched PU definition, along with the associated LU
definitions. The mechanism used to provide ESCON or FICON channel
connectivity is XCA.
Q:
If I use the CNA-8000 to support an SDLC platform that is currently
communicating through my 3745, won’t I need to reconfigure the SDLC platform
since XCA requires a PUID to pass up to the VTAM definition, and none is
configured on my SDLC platform?
A:
No. You can configure a PUID in the CNA-8000 configuration that will be passed
upstream on behalf of the SDLC platform to meet the PUID exchange
requirement.
Q:
How many remote PUs can be supported through XCA?
A:
Each XCA definition supports a maximum of 255 downstream PUs. Multiple
XCA definitions can be defined in VTAM to provide to achieve the maximum of
2,000 PUs through a single CNA-8000 network interface, or 4,000 PU platform
maximum.
Q:
I have several old Memorex Telex (or Visara) 1174s on my network, attached
through an OSA. What advantage if any can a CNA-8000 provide?
A:
The CNA-8000 can be configured to support the 1174s using DLSw protocol
directly between the platforms. This eliminates LLC traffic completely from the
network, and only IP traffic is sent between the platforms.