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***** HP Company Confidential - Do NOT circulate outside of HP *****
DECnet/OSI Phase V Overview
September 19, 1989
DECnet/OSI Phase V is Digital's next generation of networking. Phase V
is Digital's formal acknowledgment of the importance standards in
networking. This is good news for HP AdvanceNet !! (AdvanceNet has been
standards based for many years) - but watch out - Phase V is a powerful
Trojan horse. DEC is talking standards, but really selling proprietary
DECnet services.
DEC has been talking about Phase V for 3 years and an announcement is
expected in late 1989 for VMS support and sometime later for Ultrix.
DECnet/OSI Phase V looks like a powerful multivendor offering, but it
falls short in several areas:
SERVICES Proprietary DECnet services will always lead OSI
services in the DEC environment. (Examples of
DECnet services are: DEC proprietary remote logging,
file transfer, and interprocess communications.)
Running DECnet services on an OSI base provides no
more interoperability than running DECnet on a DEC
base as in Phase IV. HP, on the other hand, is
solidly committed to multivendor interoperability:
today, using ARPA services, and tomorrow using OSI
standards.
ARPA SUPPORT Phase V does NOT include ARPA. HP AdvanceNet, by
contrast, is based on ARPA and OSI standards. ARPA
defacto standards have the support of over 80
vendors. ARPA is the only true multivendor
interoperable standard today. Excluding ARPA from
Phase V illustrates DEC's refusal to recognize
today's interoperability standards. DEC is ignoring
today's most pressing and real multivendor need.
UNIX SUPPORT Today, DEC does not support OSI or industry standard
PC networking on Ultrix. The exact timing of OSI
support for the Ultrix version using Phase V is
unclear, and even more vague for standard PC
networking.
PC NETWORKING Phase V does not support PCs and is unlikely to in
the short term due to its large program size and
memory requirements (4-5 times Phase IV). How will
DEC do PC-mini integration? HP has LAN Manager and
LM/X. DEC is rumored to be "adding" LAN Manager to
Phase V (so this means no more "one network" for DEC
and hence validates HP's strategy).
LOW END VAXes With Phase V being 4-5 times the size of Phase IV,
it will not run well on DEC's lower end (and most
popular) systems such as the MicroVAX II and
VAXStation.
NETWORK MANAGEMENT DEC is completely replacing its DECnet network
management command language in Phase V. This will
force customers to eventually rewrite their network
management applications for Phase V. Not a trivial
task!
However, Phase V does have some strengths versus HP:
STRONG STORY Phase V is a very strong marketing message. It
shows real and focused commitment to OSI networking
for the future.
OSI BACKBONE DEC is the only vendor that can show an OSI backbone
network in LANs, WANs, and in connecting LANs and
WANs. To provide this OSI backbone, DEC is
implementing some OSI protocols before they are
fully defined, such as VTP and X.500. This could
create problems for customers in the future.
MIGRATION Since DEC controls DECnet Phase IV, they have
defined a clear migration path from Phase IV to
Phase V. Vendors that do not fully control their
networking protocols and work in a multivendor
environment (like HP) must work with other companies
in the industry to define the coexistence/ migration
path. DEC can do it alone for DECnet.
Remember, customers want multivendor interoperability. On the surface
Phase V appears to deliver it. However, after a more careful look, DEC
is not providing any more interoperability than Phase IV. HP
AdvanceNet with ARPA, OSI, and LAN Manager services is your customer's
best choice for multivendor interoperability today and in the future!!
***** HP Company Confidential - Do NOT circulate outside of HP *****
=======================================================================
***** HP Company Confidential - Do NOT circulate outside of HP ******
September 19, 1989
Questions About DECnet Phase V
1) With DECnet now being based on OSI, isn't DEC truly the leader in
multivendor communications?
DEC decidely is NOT the leader in multivendor communications !!
DECnet/OSI Phase V is basically a trojan horse to get customers to use
DEC's proprietary DECnet services. Remember, Phase V does not address
the following key multivendor issues:
a) ARPA communications (ARPA is the most widely used multivendor
protocol today) - HP is very strong on ARPA;
b) UNIX communications - Phase V is available on the proprietary
VMS operating system only. HP has OSI, ARPA, and SNA
communications on UNIX;
c) PC Networking - Because Phase V is not capable of PC-to-Mini
integration, DEC has licensed LAN Manager from Microsoft to
support LAN Manager on VMS. This is a clear endorsement by DEC
of HP's LAN Manager strategy. Only HP has a LAN Manager
offering. Where is DEC's?
2) Now that DECnet is based on OSI, why shouldn't I build my backbone
network on DECnet (does DECnet = OSI)?
DEC is implementing a series of bridges and routers that use
proprietary routing protocols as a backbone network. DEC is trying to
push some of these proprietary protocols through the international
standards committees. These protocols will NOT make it through the
standard community unaltered. Thus when a customer purchases a
backbone network from DEC, they are not purchasing a true Multivendor
backbone because DEC is the only company that supports the routing
protocols on the backbone.
HP's solutions are based on true multivendor standards. For wide area
networks, HP provides high performance PPN products based on the widely
accepted X.25 standard. DEC pushes proprietary DECRouters. For local
area networks both HP and DEC offer LAN bridges from companies such as
Vitalink.
3) DEC has clearly articulated how they will migrate to OSI, how will
HP migrate to OSI?
Since DECnet is a proprietary product, it is relatively easy for DEC to
develop a strategy for migration from DECnet Phase IV to DECnet Phase
V. DEC totally controls DECnet.
With HP standards-based AdvanceNet strategy, defining a
coexistence/migration path is not under HP's or any other vendor's
control. HP does not control OSI, ARPA, SNA, or other defacto
standards (NFS, LAN Manager, etc) in the same way as DEC controls
DECnet. We must move with the industry to migrate the customer's
multivendor environment (not just the DECnet environment) from ARPA to
OSI.
The REAL issue for multivendor customers is not migration, it is
coexistence. Customers are not about to throw away perfectly good ARPA-
based networks and applications just to move to an incompletely formed
OSI. ARPA will be very strong for at least another 10 years.
Therefore the real issue is the coexistence of ARPA and OSI networks.
HP plans to provide strong coexistence solutions. See the Network
Sales Portfolio's white paper entitled "OSI Evolution" for more details
on HP's coexistence strategy.
Phase V does not address ARPA/OSI coexistence.
4) When will HP support DECnet services on its processors?
HP will not offer proprietary nonstandard DECnet services to network
processors because DECnet does not provide multivendor
interoperability. However, we will provide interoperability with those
parts of Phase V that conform to OSI standards. For example, HP FTAM
and X.400 products will interoperate with the DEC FTAM and X.400
products that are part of Phase V.
5) With Phase V, I get good performance and a standards-based
environment. Why should I consider anything else but Phase V?
DEC will continue to provide the best performance and functionality
with its proprietary DECnet services in Phase V. This is fine, for
customers locked into 100% DEC computers exclusively, both now and in
the future. However, if customers want true multivendor
interoperability, ARPA and OSI services are the only way to go. Since
Phase V does not include ARPA services, Phase V is not relevant to many
of today's multivendor networks (DEC's ARPA services is not a part of
Phase V). For DEC users wanting to use limited OSI services, Phase V
is an acceptable solution and helps strengthen their move towards OSI
and HP's AdvanceNet strategy.
6) When will HP use OSI exclusively for its transport layers (like
Phase V)?
("Transport layers" refer to Layer 4 and below on the OSI model.) Due
to market need, HP networks will run on both TCP/IP and OSI transports
for at least 10 years. Most customers are not going to replace working
ARPA/TCP/IP networks with OSI networks and applications overnight.
Therefore, HP will offer both ARPA and OSI solutions for the
foreseeable future to provide our customers with the highest degree
possible of multivendor interoperability.
Customers will be able to purchase a complete OSI solution from HP that
can support relatively sophisticated applications (including Network
Management and directory services) in the 1992 timeframe. Simpler
applications that do not require OSI Network Management and Directory
services will be available in 1990 on HP-UX and 1991 on MPE-XL.
Again, remember that since HP AdvanceNet is based on industry standards
in a multivendor environment, we cannot move over to an OSI transport
as quickly as DEC can with a single vendor DECnet solution.
7) DEC has a clear direction on all of its processors (Phase V), what
is HP's direction (things look very confusing)?
First, DEC is backing off somewhat from their Phase V everywhere
strategy. Currently, DEC is rumored to be "adding" LAN Manager to Phase
V. It is unlikely that Phase V will run on a PC anytime soon (if
ever). This validates HP's standards-based AdvanceNet strategy and in
particular our LAN Manager direction.
For its strategic minicomputer lines, HP plans to converge intersystem
(between HP-UX and MPE-XL) and intervendor communications on ARPA and
OSI services. For DOS/OS/2 platforms, HP will converge on LAN Manager.
This will provide a solid foundation for intersystem and intervendor
interoperability today and in the future.
8) What is DEC's position on ARPA and NFS?
DEC provides ARPA and NFS on its VMS and Ultrix processors. Currently,
the VMS implementation is not very robust, but there are third parties
with stronger implementations. DEC's ARPA and NFS products are not
integrated with DECnet Phase V. For example, NFS yellow pages
directories are not integrated with the DNS directory that is part of
Phase V.
9) What will DEC do in Phase V for virtual terminal support? Will they
still use LAT and cterm (proprietary DEC solutions)?
DEC may provide the OSI Virtual Terminal Protocol (VTP) with Phase V.
However, DEC's VTP implementation is very slow and does not have many
features. DEC will continue to aggressively sell proprietary solutions
for terminal connect.
10) What processors will Phase V be supported on?
DEC will support Phase V on all 8000, 6000, and DECStation 3XXX/5XXX
series processors as well as the MicroVAX 3XXX series. Due to the
increased size of Phase V over Phase IV (4-5 times), it is questionable
if Phase V will be a realistic solution for DEC's popular MicroVAX II
series.
FOR MORE INFORMATION:
HP is planning to offer a more detailed technical analysis of Phase V
this Fall. Keep an eye on "Computer News" for an announcement.
In the meantime, if you have further questions, contact:
For US and Intercon: Paul Maybaum, Colorado Networks Division
For Europe: Frank Mains, Grenoble Networks Division
###