Hello,
here I have sh int output of 12.1(13)EA1 on Cat2950:
GigabitEthernet0/1 is up, line protocol is up(connected)
Hardware is Gigabit Ethernet, address is 000b.fd08.f0f2 (bia 000b.fd08.f0f1)
MTU 1500 bytes, BW 1000000 Kbit, DLY 1000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 1000Mb/s
Link type is autonegotiation, media type is SX
output flow-control is on, input flow-control is off
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters 1d18h
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue :0/40 (size/max)
5 minute input rate 286000 bits/sec, 3 packets/sec
5 minute output rate 4000 bits/sec, 2 packets/sec
4577625 packets input, 2711785589 bytes, 0 no buffer
Received 1584889 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 1584209 multicast, 0 pause input
0 input packets with dribble condition detected
2736005 packets output, 701606101 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 PAUSE output
0 output buffer failures, 0 output buffers swapped out
And same switch with 12.1(19)EA1:
GigabitEthernet0/1 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 000b.fd08.f0f2 (bia 000b.fd08.f0f1)
MTU 1500 bytes, BW 1000000 Kbit, DLY 1000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 1000Mb/s, link type is auto, media type is SX
output flow-control is on, input flow-control is off
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 108000 bits/sec, 33 packets/sec
5 minute output rate 35000 bits/sec, 24 packets/sec
43974521 packets input, 3007085736 bytes, 0 no buffer
Received 24611567 broadcasts (0 multicast)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 24547025 multicast, 0 pause input
0 input packets with dribble condition detected
17942111 packets output, 1543226158 bytes, 0 underruns
0 output errors, 0 collisions, 2 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 PAUSE output
0 output buffer failures, 0 output buffers swapped out
You can see difference between two outputs after "Received xyz broadcasts" in 12.1(19) is "(0 multicast)". What is meaning of this?
What is difference between this counter and multicast counter two rows under that in brackets?
Also almost 34% in first output and 56% in second of input packets are broadcast(multicasts). Can I troubleshoot source of that traffic somehow without sniffer ?
Regards,
Mladen
