ITEM: AA0109L

How can I set X.25 T10 and T12 timers?

Question:

My network provider wants me to set the T10 and T12 Timers, but these don't
show these as options in the SMIT menus.  They said this has to do with restarting
a connection, so you're wondering if "Automatic Link Restart" in the General
Parameters menu is the same thing.

Response:

I found these parameters in the CCITT X.25 1984 Red Book.  In Annex D
section, entitled "Packet level DCE time-outs and DTE time-limits"
there's a figure labeled "DCE Time-outs".  The timers are T10 thru T13
and the associated logical channel states are r3, p3, d3, and p7,
respectively.  The next figure, entitled "DTE Time-limits," documents
T20 thru T23, which are for logical channel states r2, p2, d2, and p6.
(These states are listed in section E.3.2 of the AIX V3 X.25 Communications 
Cookbook -- GG24-3692-01.)

Thus, the T10 and T12 timers relate only to DCEs and, as such, have no
place in the RISC/6000s menus. When the DCEs timers expire, they
simply issue a Restart (T10) or Reset (T12) which the RISC/6000 (the DTE)
understands and can, thereby, issue the correct response. Therefore,
the only way the RISC would have such timers would be if we offered a
software package (similar to XI for the 3745) that allowed us to be a
full function DCE in the network.



Support Line: How can I set X.25 T10 and T12 timers? ITEM: AA0109L

Dated: June 1994 Category: N/A

This HTML file was generated 99/06/24~13:30:32

Comments or suggestions?
Contact us