1.I have a switch network with like 5 vlans configured. I notice ther is a broadcast on the network because local ping is return with high latency, how do I troubleshoot, detect and Isolated the source.
2.On Vlan 2 on my root bridge, below is my out put of "sh int vlan 2"
TEST#sh int vl 2
Vlan2 is up, line protocol is up
Hardware is Cat6k RP Virtual Ethernet, address is 0018.746a.a07c (bia 0018.746a.a07c)
Description: ######
Internet address is X.X.X.X/24
MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output never, output hang never
Last clearing of "show interface" counters 1d16h
Input queue: 1/75/208359/206541 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 1967000 bits/sec, 1626 packets/sec
5 minute output rate 1512000 bits/sec, 1368 packets/sec
596185378 packets input, 138497387183 bytes, 0 no buffer
Received 1557287 broadcasts (127494 IP multicast)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
398327426 packets output, 129099292310 bytes, 0 underruns
0 output errors, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
Looking at the "Received 1557287 broadcasts (127494 IP multicast)", does it mean hosts on this vlan are generating the broadcast traffic.
3. A switch directly connected to my root bridge on G0/26, and host on the other ports, has the out put of the "sh int G0/26" as
YYYYYY#sh int g0/26
GigabitEthernet0/26 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 001a.2fc3.861a (bia 001a.2fc3.861a)
Description: ####Connection to Core Switch###
MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive not set
Full-duplex, 1000Mb/s, link type is auto, media type is 1000BaseSX SFP
input flow-control is off, output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output 00:00:09, output hang never
Last clearing of "show interface" counters 1d22h
Input queue: 6/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 1320000 bits/sec, 1355 packets/sec
5 minute output rate 1401000 bits/sec, 1242 packets/sec
540636824 packets input, 3354328902 bytes, 0 no buffer
Received 5856548 broadcasts (0 multicast)
0 runts, 0 giants, 0 throttles
5610 input errors, 5610 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 2184813 multicast, 0 pause input
0 input packets with dribble condition detected
391530257 packets output, 1177316497 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
Looking at the "Received 5856548 broadcasts (0 multicast)" also, does this mean the switch is receiving the broadcast from the core on G0/26 or what.
4.When a switch receives a broadcast on an interface and broadcast it on others, will the traffic categorised as "5 minute input rate 1320000 bits/sec, 1355 packets/sec (or
5 minute output rate 1401000 bits/sec, 1242 packets/sec), or will it be categorised as
" Received 5856548 broadcasts (0 multicast)"
