Connection Methods - HP Bc1500 - BladeSystem - Blade PC Supplementary Manual

Connection methods

CCI end users can connect to their blade PC using a network in a variety of ways: traditional dial-up
modems, DSL, cable modems, LANs, etc. General performance with RDC (including CCI and any net-
work architecture that uses MS-RDC) is based on response times as characterized in the following table:
Response Time
(Round Trip Ping)
<1 ms - 10 ms
10 ms - 20 ms
10 ms - 100 ms
100 ms - 200 ms
> 200 ms
Based on testing by the HP CCI team, the implications of users working off the corporate LAN and access-
ing the CCI from a remote location should yield the following experiences:
•
Broadband users: The experience when connecting to a corporate WAN/LAN should be similar to
being connected directly to the corporate LAN with no noticeable latency. However, every network
and network connection is different, so other considerations such as congestion or poor connection
quality can impact the end user experience. All testing to date indicates that CCI performance across
broadband connections is very similar to being on a Local Area Network.
•
Analog dial-up users: For users who connect to their corporate network using a analog dial-up
modem, round-trip latency of 100ms to 200ms is common, and latency higher than 200ms is not
unheard of. In this situation, CCI works well for reading email, working in spreadsheets, creating text
documents, etc. However, latency above 200ms can become an inhibitor when performing complex
tasks, such as creating PowerPoint documents or working with graphically intense applications. In
case-by-case scenarios where the remote user only has access to an analog connection, a higher
quality modem and/or custom modem initialization string might bring the latency down to a more
acceptable level. You should involve someone technically skilled at troubleshooting analog network
connections.
Typical Network Type
LANs or WANs
Broadband modems/bridges
Busy LANs or WANs
Dial-up modems
Congested Networks
End User Experience
No discernible latency; same experience as if the
user is using a traditional desktop PC (all other things
equal)
Some latency, but rarely discernible (might be detect-
able if rapidly scrolling Power Point in full screen
mode, for example)
Discernible latency (for example, when rapidly scroll-
ing PowerPoint or typing quickly, screen updates
might not appear for a second or two). Reducing
screen resolution and color depth can improve end
user experience.
Substantial latency (for example, when rapidly scroll-
ing PowerPoint or typing quickly, letters might not
appear on the screen for several seconds or more,
scrolling text documents is "jumpy," etc.). Using RDC
with latency exceeding 200ms is generally not a sat-
isfactory experience.
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