TCP/IP Feature of VM/ESA Version 2 Release 3
Highlights of Function Level 310 (FL310)
Packaging |
- TCP/IP FL310 is a priced feature of VM/ESA 2.3.0 that is
installed with the operating system. However, before this feature can
be used, authorization must be acquired from IBM.
- The Network File System (NFS) is also a priced feature of
VM/ESA 2.3.0. It too is installed with the operating system, and as
with the TCP/IP Feature "Base", authorization for its use
must be acquired from IBM.
- The TCP/IP Feature "Base" is a prerequisite for
the following TCP/IP features:
- TCP/IP NFS Feature
- TCP/IP DES Feature
- TCP/IP Source Feature
- TCP/IP Offload Feature
- A subset of RSCS printing services is provided with VM/ESA 2.3.0
to support TCP/IP LPR and TN3270E printing services.
- Server customization and replication has been simplified, as is
adding servers for new application protocols.
- New servers have been included:
- TFTP - Trivial File Transfer Protocol (BFS only)
- BOOTP- Boot Protocol
- DHCP - Dynamic Host Configuration Protocol
- UFT - Unsolicited File Transfer Protocol
-
TCP/IP Function Level 310 relies on the presence of certain functions
in the VM/ESA 2.3.0 levels of CP and CMS. Abends and incorrect
results are possible if you attempt to use it with a different level
of CP or CMS.
Note: The use of different level of TCP/IP for VM in conjunction with VM/ESA 2.3.0 creates an unsupported environment.
-
Older levels of TCP/IP program code (such as TCP/IP V2R4) may
run on VM/ESA 2.3.0, but such functions will not exploit any of the
synergy enhancements developed for the VM/ESA 2.3.0 CMS and CP
components.
Should you choose to run older TCP/IP functions in an unsupported VM/ESA 2.3.0 environment, it's recommend that all C langauage-based components (such as VMNFS, ROUTED) be locally re-built using the Language Environment supplied with VM/ESA 2.3.0, in order to avoid potential run-time compatibility problems.
Stack Enhancements |
- Support for RFC 1122, which provides multiple home address support
plus extensions for virtual host support.
- Support for RFC 1323, which addresses performance problems over high bandwidth, long-delay links.
- Exploitation of the hardware CHECKSUM facility.
- Message improvements which provide unique message numbers and
message headers for all stack server messages.
- Extensive instrumentation through application monitoring
(APPLMON CP monitor records).
- Modifications to prevent buffer pool sizes from imposing a
performance penalty.
- TELNET TN3270E support for 3287 print data streams.
- TRACING enhancements that provide more granular trace capabilities
and thus, reduced trace output.
- Improved error recovery for server failure and "disk full"
conditions that arise when tracing.
- UDP ports can now be reserved for more than one user.
SMTP Enhancements |
- The SMTP server has been redesigned for improved performance.
Improvements have been made with regard to the maximum throughput that
can be achieved by a single SMTP server.
- Major improvements to both TRACE and DEBUG capabilities.
- User Exit support to aid in preventing SMTP abuses,
such as spamming and mail bombing.
- Improved server message format and content.
NFS Enhancements |
- The Network File System server now supports the mounting of Shared File System (SFS) and Byte File System (BFS) directories, in addition to CMS minidisks.
Client Enhancements |
- NETSTAT - Command operand enhancements include:
- ARP - Displays ARP cache entries
- DELARP - Deletes ARP cache entries (restricted use)
- LEVEL - Displays processor type, VM/ESA and TCP/IP levels
- SELECT - Limits response output based on specific values, such as a userid or client name
- POOL - Includes Xlate and IPRoute information
- INTERVAL - Enhanced to remove single panel display limitation
- SENDFILE - Is now provided as a CMS component that contains
both TCP/IP and CMS function, as well as a UFT client
- NOTE - Is now provided as a CMS component that contains
both TCP/IP and CMS function
- LPR - Can now be used to exploit
RSCS to completely
handle delivery of printed output in an asynchronous manner
- IDENTIFY - Enhanced to provide TCP/IP-related information
- PRODUCTIVITY AIDS - The CMS functions that follow have been
enhanced to recognize TCP/IP network addressing:
- RDRLIST PEEK EXECUTE RECEIVE TELL NAMES
- MIME support added in the SENDFILE command, which now provides the ability to include MIME formatted mail.