Maintenance Operations Protocol

The Maintenance Operation Protocol (MOP) is used for utility services such as uploading and downloading system software, remote testing and problem diagnosis. It was a proprietary protocol of Digital Equipment Corporation. MOP frames can be one of the following commands:[1]

Command | Description

|

[memory load data] | Contains memory load data.
[mem load request] | Request for memory load segment.
[mem load w/addr] | Memory load with transfer address.
[par load w/addr] | Parameter load with transfer address.
[dump service req] | Request for assistance with dump operation.
[mem dump request] | Request for next memory dump segment.
[memory dump data] | Contains memory dump data.
[dump completed] | Acknowledgment of dump completion.
[volunteer assist] | Offer of dump/load/loop assistance.
[request program] | Request for system or loader program.
[rem boot request] | Request for boot program.
[remote ID reqst] | Request for remote console identification.
[remote system ID] | Remote console identification information.
[counters request] | Request for communication information counters.
[counters reply] | Communication information counters.
[reserve console] | Remote console in reserved state.
[release console] | Release of remote console from reserved state.
[rem console poll] | Poll of remote console for status.
[rem console rply] | Response to remote console poll.
[loopback request] | Request to loopback enclosed data.
[loopback reply] | Response to loopback request with data.

## See also

* Reverse Address Resolution Protocol (RARP)

## References

1. ↑ http://www.protocols.com/pbook/pdf/decnet.pdf[bare URL PDF]

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