Specifications

Data Link Specific Information
Page
B-2
The protocol types are:
Value Protocol
90-00 Loopbac k
60-01 Dump/Load
60-02 Remote Console
The multicast addresses are:
Address Group
CF-00-00-00-00-00
Loopback assistance
AB-00-00-01-00-00 Dump/Load assistance
AB-00-00-02-00-00 Remote Console
Ethernet counters can be read through the Remote Console. The
counters are defined in the DNA Ethernet Data Link specification. The
counters are a fixed format block with each value as indicated below.
Byte
Lerqth Counter Value
Seconds since last zeroed
Bytes received
Bytes sent
Frames received
Frames sent
Multicast bytes received
Multicast frames received
Frames sent, initially deferred
Frames sent, single collision
Frames sent, multiple collisions
Send failure
Send failure reason
bitmap
Receive failure
Receive failure reason bitmap
Unrecognized frame destination
Data overrun
System buffer unavailable
User buffer unavailable
The bit meanings for the Send failure reason bitmap are:
Bit Reason
0 Excessive collisions
1 Carrier check failed
2 Short circuit
3 Open circuit
4 Frame too long
5 Remote failure to defer