Hi All,
When all the traffic running on the primary link, can observe one way traffic on the backup link. Bidirectional traffic on the backup link only can be
observed when primarly link manually shut down.
My Question is: During what kind of sitiona will cause one way traffic, (not relate to link problem). the scenario below is primary backup link design, when all the traffic running on the primary link, there should be no traffic can be observed on the backup link. But why there are such huge one way traffic on the backup link?
Primary Link
SWITCH--A#sh int gi0/1
GigabitEthernet0/1 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 0012.d973.1081 (bia 0012.d973.1081)
Description: MAN 1
MTU 1500 bytes, BW 16384 Kbit, DLY 100 usec,
reliability 255/255, txload 36/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s, media type is RJ45
input flow-control is off, output flow-control is off
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output 00:00:01, 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)
30 second input rate 106000 bits/sec, 27 packets/sec
30 second output rate 2371000 bits/sec, 276 packets/sec
SWITCH--B#sh int gi0/1
GigabitEthernet4/7 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet Port, address is 0013.c4c6.9f16 (bia 0013.c4c6.9f16)
Description: MAN 2
MTU 1500 bytes, BW 16384 Kbit, DLY 10 usec,
reliability 255/255, txload 2/255, rxload 55/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s
input flow-control is off, output flow-control is off
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:01, output never, output hang never
Last clearing of "show interface" counters never
Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
30 second input rate 3575000 bits/sec, 662 packets/sec
30 second output rate 192000 bits/sec, 42 packets/sec
Backup Link
SWITCH--C#sh int gi0/1
GigabitEthernet0/1 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 0012.d966.bf81 (bia 0012.d966.bf81)
Description: MAN 3
MTU 1500 bytes, BW 10240 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 68/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s, media type is RJ45
input flow-control is off, output flow-control is off
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:01, output 00:00:04, output hang never
Last clearing of "show interface" counters 00:18:03
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
30 second input rate 2762000 bits/sec, 441 packets/sec
30 second output rate 0 bits/sec, 0 packets/sec
SWITCH--D#sh int gi0/1
GigabitEthernet4/7 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet Port, address is 0014.1c06.73b6 (bia 0014.1c06.73b6)
Description: MAN 4
MTU 1500 bytes, BW 10240 Kbit, DLY 10 usec,
reliability 255/255, txload 77/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s
input flow-control is off, output flow-control is off
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:01, output never, output hang never
Last clearing of "show interface" counters 10w2d
Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
30 second input rate 0 bits/sec, 0 packets/sec
30 second output rate 3104000 bits/sec, 406 packets/sec
