Alert Standard Format (ASF) Specification

Alert Standard Format (ASF) Specification v2.0 DMTF Document DSP0136
DSP0136 23 April 2003 Page 45 of 94
2. The managed client responds with an RMCP ACK, returning only an RMCP Header. Note
that all values are copied from the “Request” message’s RMCP header, with the “ACK” bit set
in the fourth byte.
RMCP Header
Vers Rsvd Seq# Class
06h 00h 05h 86h
3. The managed client responds with the associated ASF-RMCP “Response”. Note that the
Message Tag value (08h) is copied from the “Request” message.
RMCP Header ASF-RMCP Data
Vers Rsvd Seq# Class IANA Enterprise Number Type Tag Rsvd Len
06h 00h 09h 06h 00h 00h 11h BEh xx 08h xx xx
4. The management console, having received both the ACK and “Response” sends an RMCP
ACK, completing the request/response cycle. The RMCP Header is copied from the
managed client’s “Response” message, with the “ACK” bit set in byte 4.
RMCP Header
Vers Rsvd Seq# Class
06h 00h 09h 86h
Interactions with some packet loss
1. The description that follows illustrates the RMCP Header and RMCP Data fields in a console-
to-client communication where some of the messages are lost. The management console
sends an ASF-RMCP “Request” message
RMCP Header ASF-RMCP Data
Vers Rsvd Seq# Class IANA Enterprise Number Type Tag Rsvd Len
06h 00h 05h 06h 00h 00h 11h BEh xx 08h xx xx
2. The management console waits to receive an ACK from the client, but the client never
received that “Request” message; the console re-transmits the “Request” message with the
same Sequence Number as the original message in step 1.
RMCP Header ASF-RMCP Data
Vers Rsvd Seq# Class IANA Enterprise Number Type Tag Rsvd Len
06h 00h 05h 06h 00h 00h 11h BEh xx 08h xx xx
3. The managed client responds with an RMCP ACK, returning only an RMCP Header. Note
that all values are copied from the “Request” message’s RMCP header, with the “ACK” bit set
in the fourth byte. The console never receives this ACK.
RMCP Header
Vers Rsvd Seq# Class
06h 00h 05h 86h
4. The managed client responds with the associated ASF-RMCP “Response”. Note that the
Message Tag value (08h) is copied from the “Request” message.
RMCP Header ASF-RMCP Data
Vers Rsvd Seq# Class IANA Enterprise Number Type Tag Rsvd Len
06h 00h 09h 06h 00h 00h 11h BEh xx 08h xx xx