Cisco Systems 11.0 BT , ,

4 Cisco IOS Release 11.0 BT Release Note and Update to Conﬁguration Guides and Command References

Update to Configuration Guide

Microcode Software

Note that microcode software images are bundled with the system software image. Bundling

eliminates the need to store separate microcode images. When the router starts up, the system

software unpacks the microcode software bundle and loads the proper software on all the interface

processor boards.

New Software Features in 11.0(10)BT

The TN3270 server is a new feature on the CIP of the Cisco 7000 family of routers. The TN3270

server allows TN3270 clients access to IBM and IBM-compatible mainframes. It can reduce the

cycles spent by the mainframe on TCP/IP and TN3270 processing by a factor of ten or more and

off-load the TCP/IP and TN3270 cycles from the mainframe.

The TN3270 server supports up to 8000 (CIP1) or up to 16000 (CIP2) concurrent sessions, while

mostexternal gateway solutions can support only 1000 to 2000 sessions. The TN3270 server offers

the following capabilities:

•Load Balancing and Redundancy—Provides effective CIP resource utilization and more

consistentresponse times. (This feature is initially provided by means of an external, prototype

implementation.)

•End-to-End Session Visibility—Provides enhanced resource management.

•Systems Network Architecture (SNA) Session Switching—Off-loads VTAM by providing

session routing.

•TN3270E Support—In combination with a TN3270E client, provides advanced SNA

management and SNA functionality, including printer support.

•Dynamic Deﬁnition of Dependent Logical Units (LU)—Provides simpliﬁed conﬁguration and

network deﬁnition at the router and in VTAM.

•Dynamic Allocation of LUs—Makes efﬁcient use of LU pool resources while supporting

multiple SNA model types.

TN3270 server requires 32 MB of CIP dynamic RAM to support up to 4000 sessions, 64 MB to

support8000 sessions, and 128 MB to support 16000 sessions (CIP2 only). TN3270 server can run

concurrently with any of the other CIP applications (IP Datagram, TCP/IP Ofﬂoad, or CIP SNA

(CSNA)), but operation of any of these features will affect the total number of sessions supported

because of contention for CIP processor cycles.

Update to Conﬁguration Guide

Theinformation that follows is an update to the Router Products Conﬁguration Guide, Chapters 23

to 33. Add the TN3270 information as a standalone chapter following page 33-22.

Cisco 7000 Series Required Code

Memory Required CIP

Memory Release11.0

Runs From

Enterprise Set

(gs7-k-mz) 8 MB Flash memory

card 16 Mb 32 Mb RAM

Enterprise/CIP2 Set

(gs7-k2-mz) 8 MB Flash memory

card 16 Mb 32 Mb RAM

Cisco 7500 Series

and Cisco 7000

with RSP7000 MinimumRequired

Code Memory Required Main

Memory Required CIP

Memory Release11.0

Runs From