Frame Processing And Bridge Port Statistics - 3Com LANPLEX 6000 User Manual

13-6 C 13: A
HAPTER DMINISTERING
Frame Processing
and Bridge Port
Statistics
B P
RIDGE ORTS
All frames received on a physical (Ethernet, FDDI, or Token Ring) interface
and not explicitly directed to the LANplex system are delivered to the
corresponding bridge port. A frame is then either forwarded to another
bridge port or discarded. A frame may be discarded for the following
reasons:
The destination station is on the same segment as the source station
The receive bridge port is blocked
There is some problem with the frame
A user-defined packet filter indicated that the frame should not be
forwarded
Figure 13-1 shows the order in which the discard decisions are made.
Receive Bridge Port Statistics
rxFrames
sameSegDiscs
rxBlockedDiscs
rxSecurityDiscs
rxErrorDiscs
rxOtherDiscs
rxMcastFilters
rxAllFilters
rxForwardUcasts
rxFloodUcasts
rxForwardMcasts
Figure 13-1 How Frame Processing Affects Receive Bridge Port Statistics
A frame forwarded to a bridge port is transmitted onto a physical interface
unless it is discarded. A frame may be discarded for the following reasons:
The transmit bridge port is blocked
The frame is too large for the corresponding physical interface
Frames received on this bridge port
Frames discarded because source and
destination stations on same segment
Frames discarded because receive bridge port
blocked
Frames discarded because frame not valid for
bridging
Frames discarded because of user-defined
packet filter
=
Frames forwarded by this bridge port
from Physical
Interface