Sometimes it is necessary to see what an uplink to a switch, vmware exsi host etc is doing in terms of traffic,
A useful command is show interface summary
This then outputs the following:
cat2960s#sh int summary
*: interface is up
IHQ: pkts in input hold queue IQD: pkts dropped from input queue
OHQ: pkts in output hold queue OQD: pkts dropped from output queue
RXBS: rx rate (bits/sec) RXPS: rx rate (pkts/sec)
TXBS: tx rate (bits/sec) TXPS: tx rate (pkts/sec)
TRTL: throttle count
Interface IHQ IQD OHQ OQD RXBS RXPS TXBS TXPS TRTL
-------------------------------------------------------------------------
* Vlan1 0 0 0 0 1000 1 1000 1 0
FastEthernet0 0 0 0 0 0 0 0 0 0
* GigabitEthernet1/0/1 0 0 0 1747 1000 1 52000 49 0
* GigabitEthernet1/0/2 0 0 0 1757 0 0 52000 49 0
* GigabitEthernet1/0/3 0 0 0 191986 480000 106 290000 122 0
* GigabitEthernet1/0/4 0 0 0 1645 92000 40 158000 90 0
* GigabitEthernet1/0/5 0 0 0 1733 0 0 52000 49 0
* GigabitEthernet1/0/6 0 0 0 5969 1172000 658 13763000 1271 0
* GigabitEthernet1/0/7 0 0 0 1756 0 0 52000 49 0
* GigabitEthernet1/0/8 0 0 0 1726 1000 1 52000 50 0
* GigabitEthernet1/0/9 0 0 0 1952 147000 121 506000 191 0
* GigabitEthernet1/0/10 0 0 0 1737 6000 2 52000 49 0
* GigabitEthernet1/0/11 0 0 0 1736 0 0 52000 49 0
...
Note: RX is traffic Received and TX is traffic sent
Let's dig a bit deeper into an interface:
cat2960s# sh int gigabitEthernet 1/0/29 summary
*: interface is up
IHQ: pkts in input hold queue IQD: pkts dropped from input queue
OHQ: pkts in output hold queue OQD: pkts dropped from output queue
RXBS: rx rate (bits/sec) RXPS: rx rate (pkts/sec)
TXBS: tx rate (bits/sec) TXPS: tx rate (pkts/sec)
TRTL: throttle count
Interface IHQ IQD OHQ OQD RXBS RXPS TXBS TXPS TRTL
-------------------------------------------------------------------------
* GigabitEthernet1/0/29 0 0 0 53071 477756000 39677 10729000 18785 0
From the output above we can deduce the following:
RX Traffic = 477.75 Mbits/second (477756000 bits/s)
TX Traffic = 10.72 Mbits/second (10729000 bits/s)
