Can really see an issue on the switchport stats:
Port-channelx is up, line protocol is up (connected)
Hardware is EtherChannel, address is 70db.987c.cf02 (bia 70db.987c.cf02)
MTU 1500 bytes, BW 20000000 Kbit/sec, DLY 10 usec,
reliability 255/255, txload 3/255, rxload 6/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 10Gb/s, media type is N/A
input flow-control is on, output flow-control is unsupported
Members in this channel: Te3/3 Te4/3
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, output never, output hang never
Last clearing of "show interface" counters 4w2d
Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 2
Queueing strategy: fifo
Output queue: 0/40 (size/max)
30 second input rate 518857000 bits/sec, 112327 packets/sec
30 second output rate 265545000 bits/sec, 100090 packets/sec
104738914441 packets input, 74668261892153 bytes, 0 no buffer
Received 90219610 broadcasts (84792897 multicasts)
0 runts, 0 giants, 0 throttles
6 input errors, 5 CRC, 0 frame, 0 overrun, 0 ignored
0 input packets with dribble condition detected
93610942452 packets output, 52207415240111 bytes, 0 underruns
0 output errors, 0 collisions, 1 interface resets
0 unknown protocol drops
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out
--------------------------
TenGigabitEthernet3/3 is up, line protocol is up (connected)
Hardware is Ten Gigabit Ethernet Port, address is 70db.987c.cf02 (bia 70db.987c.cf02)
MTU 1500 bytes, BW 10000000 Kbit/sec, DLY 10 usec,
reliability 255/255, txload 3/255, rxload 7/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 10Gb/s, link type is auto, media type is 10GBase-SR
input flow-control is on, output flow-control is on
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:09, output never, output hang never
Last clearing of "show interface" counters 4w2d
Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 10
Queueing strategy: fifo
Output queue: 0/40 (size/max)
30 second input rate 300241000 bits/sec, 66998 packets/sec
30 second output rate 142683000 bits/sec, 51599 packets/sec
59057703735 packets input, 42452892002095 bytes, 0 no buffer
Received 65049344 broadcasts (59840885 multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 input packets with dribble condition detected
49083158628 packets output, 28965234988365 bytes, 0 underruns
0 output errors, 0 collisions, 1 interface resets
0 unknown protocol drops
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out
-------------------------------
TenGigabitEthernet4/3 is up, line protocol is up (connected)
Hardware is Ten Gigabit Ethernet Port, address is 70db.987c.cf0a (bia 70db.987c.cf0a)
MTU 1500 bytes, BW 10000000 Kbit/sec, DLY 10 usec,
reliability 255/255, txload 3/255, rxload 6/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 10Gb/s, link type is auto, media type is 10GBase-SR
input flow-control is on, output flow-control is on
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:01, output never, output hang never
Last clearing of "show interface" counters 4w2d
Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 15
Queueing strategy: fifo
Output queue: 0/40 (size/max)
30 second input rate 256706000 bits/sec, 48327 packets/sec
30 second output rate 147684000 bits/sec, 50826 packets/sec
45697398443 packets input, 32224952791572 bytes, 0 no buffer
Received 25182232 broadcasts (24962680 multicasts)
0 runts, 0 giants, 0 throttles
6 input errors, 5 CRC, 0 frame, 0 overrun, 0 ignored
0 input packets with dribble condition detected
44543786394 packets output, 23247419066906 bytes, 0 underruns
0 output errors, 0 collisions, 1 interface resets
0 unknown protocol drops
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out
Did also check flow_control on the checkpoint appliance:
# ethtool -a eth3-01
Pause parameters for eth3-01:
Autonegotiate: off
RX: on
TX: on
# ethtool -a eth3-02
Pause parameters for eth3-02:
Autonegotiate: off
RX: on
TX: on
# ethtool -S eth3-02 | grep -i flow_control
tx_flow_control_xon: 5
rx_flow_control_xon: 0
tx_flow_control_xoff: 949
rx_flow_control_xoff: 0
# ethtool -S eth3-01 | grep -i flow_control
tx_flow_control_xon: 4
rx_flow_control_xon: 0
tx_flow_control_xoff: 726
rx_flow_control_xoff: 0
# netstat -ni
Kernel Interface table
Iface MTU Met RX-OK RX-ERR RX-DRP RX-OVR TX-OK TX-ERR TX-DRP TX-OVR Flg
Mgmt 1500 0 81334370 0 0 0 220791303 0 0 0 BMsRU
Sync 1500 0 89840333 0 0 0 1214076035 0 0 0 BMsRU
bond0 1500 0 45908035350 0 104892 0 53128920091 0 0 0 BMmRU
bond1 1500 0 160720368 0 0 0 223132821 0 0 0 BMmRU
bond2 1500 0 489526962 0 0 0 1368598249 0 0 0 BMmRU
eth1-07 1500 0 399676323 0 0 0 154522202 0 0 0 BMsRU
eth1-08 1500 0 79384560 0 0 0 2341413 0 0 0 BMsRU
eth3-01 1500 0 22531934214 0 45033 0 26259792806 0 0 0 BMsRU
eth3-02 1500 0 23376087366 0 59859 0 26869129491 0 0 0 BMsRU
lo 65536 0 7158451 0 0 0 7158451 0 0 0 LNRU