December 2005
Intermediate to advanced
1066 pages
33h 38m
English
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Statistics
The net_bridge data structure includes an instance of a net_device_stats data structure. Each network device employs
one net_device_stats structure, as described in the
section "Statistics" in Chapter 12. The bridging code uses
only a few fields:
-
tx_packets -
tx_bytes tx_packetsis the number of frames generated locally and transmitted over the bridge device. It is updated bybr_dev_xmit. Note that flooded frames are counted only once, even though they exit all enabled ports.tx_bytes, the sum of the sizes of thetx_packetsframes sent, is also updated bybr_dev_xmit.-
tx_dropped Number of frames that could not be transmitted because the flood routine
br_floodfailed to allocate a buffer.-
rx_packets -
rx_bytes rx_packetsis incremented bybr_pass_frame_upeach time an ingress frame received on the bridge device is delivered locally.rx_bytesis the counterpart oftx_bytes.
All of the routines referenced here are described in Chapter 16.
No statistics are kept by the STP.
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