Cabletron Systems EMM-E6 manual Received Bytes, Total Packets, Avg Packet Size, Broadcast Packets

Using the EMM-E6 Hub View

NOTE

Unless you close, then re-open, a window or use the Reset button, statistical counters will continue to increment until a value of 232-1 (approximately 4 billion) is reached, at which point they will roll over and restart at 0.

General/Error Statistics

The General/Errors statistics windows display the following fields:

Received Bytes

The total number of bytes of data received by this network (channel), module, or port since the statistics window was opened or the Reset button was pressed.

Total Packets

The total number of packets of all types received by this network (channel), module, or port since the statistics window was opened or the Reset button was pressed.

Avg Packet Size

The average number of bytes per packet received by this network (channel), module, or port since the statistics window was opened or the Reset button was pressed. The average packet size is calculated after each polling interval by dividing the cumulative number of bytes received by the cumulative number of packets received.

Broadcast Packets

The total number of broadcast packets received by this network (channel), module, or port since the statistics window was opened or the Reset button was pressed. Broadcast packets have a single address recognized by each station on the net: this address is designated in IP form as 255.255.255.255, or in MAC hexadecimal form as FF-FF-FF-FF-FF-FF. The ARP and RARP requests sent by bridges and routers are broadcast packets.

Multicast Packets

The total number of multicast packets received by this network (channel), module, or port since the statistics window was opened or the Reset button was pressed. Multicast packets are simultaneously addressed to more than one address, but fewer than all addresses.

Collisions

The total number of collisions recorded by this network (channel), module, or port since statistics window was opened or the Reset button was pressed. The EMM-E6 counts both receive collisions — those detected while a port is receiving data — and transmit collisions — those detected while a port is transmitting data (i.e., the port has transmitted one of the colliding packets); however, these counts are combined and a single total value is displayed. Collisions of this type (called

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