Network Working Group G. Dudley
Request for Comments: 2353 IBM
Category: Informational May 1998
APPN/HPR in IP Networks
APPN Implementers' Workshop Closed Pages Document
Status of this Memo
This memo provides information for the Internet community. It does
not specify an Internet standard of any kind. Distribution of this
memo is unlimited.
Copyright Notice
Copyright (C) The Internet Society (1998). All Rights Reserved.
Table of Contents
1.0 Introduction . . . . . . . . . . . . . . . . . . . . . . . 2
1.1 Requirements . . . . . . . . . . . . . . . . . . . . . . . 3
2.0 IP as a Data Link Control (DLC) for HPR . . . . . . . . . 3
2.1 Use of UDP and IP . . . . . . . . . . . . . . . . . . . . 4
2.2 Node Structure . . . . . . . . . . . . . . . . . . . . . . 5
2.3 Logical Link Control (LLC) Used for IP . . . . . . . . . . 8
2.3.1 LDLC Liveness . . . . . . . . . . . . . . . . . . . . 8
2.3.1.1 Option to Reduce Liveness Traffic . . . . . . . . 9
2.4 IP Port Activation . . . . . . . . . . . . . . . . . . . . 10
2.4.1 Maximum BTU Sizes for HPR/IP . . . . . . . . . . . . . 12
2.5 IP Transmission Groups (TGs) . . . . . . . . . . . . . . . 12
2.5.1 Regular TGs . . . . . . . . . . . . . . . . . . . . . 12
2.5.1.1 Limited Resources and Auto-Activation . . . . . . 19
2.5.2 IP Connection Networks . . . . . . . . . . . . . . . . 19
2.5.2.1 Establishing IP Connection Networks . . . . . . . 20
2.5.2.2 IP Connection Network Parameters . . . . . . . . . 22
2.5.2.3 Sharing of TGs . . . . . . . . . . . . . . . . . . 24
2.5.2.4 Minimizing RSCV Length . . . . . . . . . . . . . . 25
2.5.3 XID Changes . . . . . . . . . . . . . . . . . . . . . 26
2.5.4 Unsuccessful IP Link Activation . . . . . . . . . . . 30
2.6 IP Throughput Characteristics . . . . . . . . . . . . . . 34
2.6.1 IP Prioritization . . . . . . . . . . . . . . . . . . 34
2.6.2 APPN Transmission Priority and COS . . . . . . . . . . 36
2.6.3 Default TG Characteristics . . . . . . . . . . . . . . 36
2.6.4 SNA-Defined COS Tables . . . . . . . . . . . . . . . . 38
2.6.5 Route Setup over HPR/IP links . . . . . . . . . . . . 39
2.6.6 Access Link Queueing . . . . . . . . . . . . . . . . . 39
2.7 Port Link Activation Limits . . . . . . . . . . . . . . . 40
Dudley Informational