pjw@hpcuhc.cup.hp.com (Pam Williams) (01/08/91)
I am finding that when using a sna3270 terminal emulator to an IBM host with a BINDed RU size of 1K, a few host applications still send security screens in one RU of larger than 1K to the 3270 terminal. The 3270 emulator doesn't like this and sends back a neg response. I realize that all I need to do is to change the logmode table on the host to specify the larger size, and there would be no inconsistences. However, I don't understand why I would be receiving the larger RU in the first place. How can VTAM be sending a RU larger than the value set in the BIND? Anyone else out there seen this problem? Thanks, Pam ---------------------------------------------------------------- Pam Williams Open Systems Software Division pjw@cup.hp.com Systems Development for Multi-Users 408-447-4373 Hewlett-Packard, Co. Cupertino, CA ----------------------------------------------------------------
pjw@hpcuhc.UUCP (Pam Williams) (01/08/91)
I am finding that when using a sna3270 terminal emulator to an IBM host with a BINDed RU size of 1K, a few host applications still send security screens in one RU of larger than 1K to the 3270 terminal. The 3270 emulator doesn't like this and sends back a neg response. I realize that all I need to do is to change the logmode table on the host to specify the larger size, and there would be no inconsistences. However, I don't understand why I would be receiving the larger RU in the first place. How can VTAM be sending a RU larger than the value set in the BIND? Anyone else out there seen this problem? Thanks, Pam ---------------------------------------------------------------- Pam Williams Open Systems Software Division pjw@cup.hp.com Systems Development for Multi-Users 408-447-4373 Hewlett-Packard, Co. Cupertino, CA ----------------------------------------------------------------
tom@pedsga.UUCP (Tom Gillispie <gillispi>) (01/15/91)
In article <9101091607.AA01872@lilac.berkeley.edu> Pam Williams <hpda!hpcuhc!pjw@ucbvax.Berkeley.EDU> writes: >I am finding that when using a sna3270 terminal >emulator to an IBM host with a BINDed RU size of 1K, a few >host applications still send security screens >in one RU of larger than 1K to the 3270 terminal. >The 3270 emulator doesn't like this and sends >back a neg response. > ..... >However, I don't understand why I would >be receiving the larger RU in the first >place. > >How can VTAM be sending a RU larger than >the value set in the BIND? The 3174 Subsystem Control Unit Functional Description (GA23-0218) has several comments on RU sizes. One of them leads you to believe that it does check outbound (from host to device) RU sizes against BIND values, but the sense code that would be used to report the error (X'1002') is only returned by a Type 1 LU (printer). It also says that for remote models, for LU Type 2 and 3, there "are no restrictions" on the outbound RU size. Whether that is meant to include checking against BIND limits is left quite *un*clear in the document. This appears to be the same for a 3276, based on an older Component Description I have. This is a classic area where 3270 emulators run into IBM not following their own architecture in hardware implementations. -- Tom Gillispie Internet: gillispi@tinton.ccur.com (201) 758-7329 Concurrent Computer Corp. UUCP:............rutgers! \ 106 Apple St. ..princeton! or masscomp!- petsd!tinton!gillispi Tinton Falls NJ 07724 .....purdue! or encore! /