RFC 2238 (rfc2238) - Page 2 of 35
Definitions of Managed Objects for HPR using SMIv2
Alternative Format: Original Text Document
RFC 2238 Definitions of Managed Objects for HPR November 1997 3. The SNMP Network Management Framework The SNMP Network Management Framework consists of several components. For the purpose of this specification, the applicable components of the Framework are the SMI and related documents [1, 2, 3], which define the mechanisms used for describing and naming objects for the purpose of management. The Framework permits new objects to be defined for the purpose of experimentation and evaluation. 4. Overview This document identifies objects for monitoring the configuration and active characteristics of devices with HPR capabilities. HPR is an enhancement to the Advanced Peer-to-Peer Network (APPN) architecture that provides fast data routing and improved session reliability. APPN is one of the protocols that can use the HPR transport mechanism. See the SNANAU APPN MIB [4] for management of APPN and APPN use of the HPR transport. The HPR terms and overall architecture [5] are available at http://www.networking.ibm.com/app/aiwdoc/aiwsrc.htm. Automatic Network Routing (ANR) is a fast low-level routing technique. Each node assigns a unique (within that node) ANR label for each out-bound link as it is activated. The label size is defined by the ANR node, and nodes only need to know how to interpret their own labels. The ANR string is a group of ANR labels encoded in a header in front of the message being sent. At each hop the node strips off its own ANR label and forwards the message onto the link with that label. The last label in the string is the Network Connection Endpoint (NCE), which identifies the component within the destination node that is to receive the message. Rapid Transport Protocol (RTP) is an end-to-end full duplex transport connection (pipe). It provides for high-speed transport of data using ANR. RTP is connection-oriented, and delivers data in correct order reliably. Error recovery is done efficiently with selective retransmission of data. An RTP path can be switched without disrupting the sessions using it. An RTP path switch may be done automatically if a link in the path fails and another RTP path is available, or on demand to attempt to restore the optimal path. RTP performs flow/congestion control with the Adaptive Rate-Based (ARB) algorithm, described in [5]. ARB is done only at the endpoints of the RTP pipe, so intermediate hops are not involved. Clouston & Moore Standards Track
