User`s guide

System Initialization and Acceptance Testing (Normal Operation)
4.7 Operating System Bootstrap
Table 4–3 Network Maintenance Operations Summary
Function Role Transmit Receive
MOP Ethernet and IEEE 802.3 Messages
1
Dump Requester —– —–
Server —– —–
Load Requester REQ_
PROGRAM
2
to solicit VOLUNTEER
REQ_MEM_
LOAD
to solicit & ACK MEM_LOAD
or MEM_LOAD_w_XFER
or PARAM_LOAD_w_XFER
Server —– —–
Console Requester —– —–
Server COUNTERS in response to REQ_COUNTERS
SYSTEM_ID
3
in response to REQUEST_ID
BOOT
Loopback Requester —– —–
Server LOOPED_
DATA
4
in response to LOOP_DATA
IEEE 802.3 Messages
5
Exchange
ID
Requester —– —–
Server XID_RSP in response to XID_CMD
Test Requester —– —–
1
All unsolicited messages are sent in Ethernet (MOP V3) and IEEE 802.2 (MOP V4), until the MOP version of
the server is known. All solicited messages are sent in the format used for the request.
2
The initial REQ_PROGRAM message is sent to the dumpload multicast address. If an assistance
VOLUNTEER message is received, then the responder’s address is used as the destination to repeat the
REQ_PROGRAM message and for all subsequent REQ_MEM_LOAD messages.
3
SYSTEM_ID messages are sent out every 8 to 12 minutes to the remote console multicast address and, on
receipt of a REQUEST_ID message, they are sent to the initiator.
4
LOOPED_DATA messages are sent out in response to LOOP_DATA messages. These messages are actually
in Ethernet LOOP TEST format, not in MOP format, and when sent in Ethernet frames, omit the additional
length field (padding is disabled).
5
IEEE 802.2 support of XID and TEST is limited to Class 1 operations.
(continued on next page)
System Initialization and Acceptance Testing (Normal Operation) 4–29