3Com 4007, Implementation Manual, Page: 621 / 684

Roving Analysis 621
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If the physical port configuration changes in the system (that is, if you
remove or rearrange modules), the MAC address of the analyzer port
remains fixed. If the module with the analyzer port is replaced with a
different media type module, the RAP configuration is cleared.
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On any Layer 3 module, defining a monitor port (
analyzer start
command) affects that port’s ability to collect RMON data. The ability
to collect RMON data is not lost when the analyzer port is defined
(
analyzer add
), but when the monitor port is defined (
analyzer
start
). Table 95 lists which RMON groups can continue to collect
data, and which cannot after the port has become a monitor port.
The RMON groups that require samples of traffic from the ASICs will
not work because they do not receive any traffic data when a port is
defined as a monitor port. The Multilayer Switching Modules are
capable of doing either roving analysis or traffic sampling, but not
both at the same time.
Table 95 Roving Analysis and RMON Data
RMON Groups
Works with
Roving
Analysis?
RMON-1 Groups
Statistics Yes
History Yes
Alarm Yes
Hosts No
HostTopN No
Matrix No
Event Yes
RMON-2 Groups
protocolDir Yes
protocolDist Yes
addressMap No
nlHost No
nlMatrix No
alHost No
alMatrix No
probeConfig.
probeCapabilities Yes