Multiple TCP packets with bad checksum detected on Interconnect port e0b

Applies to

• AFF-C800 
• 9.13.1P6

Issue

• Multiple TCP packets with bad checksum are being detected on the Interconnect port e0b in EMS log. 

1/31/2024 15:53:57  node-B    ERROR         netif.tcp.conn.bad.checksum: TCP packet with bad checksum detected on port e0b. The packet arrived on connection with source address 111.222.33.444 and destination_address 555.666.77.888.
1/31/2024 14:53:09  node-B    ERROR         netif.tcp.conn.bad.checksum: TCP packet with bad checksum detected on port e0b. The packet arrived on connection with source address 111.222.33.444 and destination_address 555.666.77.888.
1/31/2024 13:51:06  node-B    ERROR         netif.tcp.conn.bad.checksum: TCP packet with bad checksum detected on port e0b. The packet arrived on connection with source address 111.222.33.444 and destination_address 555.666.77.888.
1/31/2024 12:50:59  node-B    ERROR         netif.tcp.conn.bad.checksum: TCP packet with bad checksum detected on port e0b. The packet arrived on connection with source address 111.222.33.444 and destination_address 555.666.77.888.
1/31/2024 11:45:00  node-B    ERROR         netif.tcp.conn.bad.checksum: TCP packet with bad checksum detected on port e0b. The packet arrived on connection with source address 111.222.33.444 and destination_address 555.666.77.888.

• There are no CRC errors counted by IFSTAT -A, node-B is experiencing received errors related to Bad TCP checksum. 

Node: node-B

-- interface  e0b  (3 hours, 7 minutes, 36 seconds) --

RECEIVE
 Total frames:     2568k | Frames/second:     228  | Total bytes:       511m
 Bytes/second:    45400  | Total errors:        0  | Errors/minute:       0
 Total discards:      0  | Discards/minute:     0  | Multi/broadcast: 11619
 Non-primary u/c:    78  | CRC errors:          0  | Long frames:         0
 Jabber:              0  | Length errors:       0  | No buffer:           0
 Pause:               0  | Jumbo:           35893  | Error symbol:        0
 Bus overruns:        0  | LRO segments:      256  | LRO bytes:         104k
 LRO6 segments:       0  | LRO6 bytes:          0  | Bad UDP cksum:      67
 Bad UDP6 cksum:      0  | Bad TCP cksum:     178  | Bad TCP6 cksum:      0
 Mcast v6 solicit:    0  | Lagg errors:         0  | Lacp errors:         0
 Lacp PDU errors:     0
TRANSMIT
 Total frames:     3221k | Frames/second:     286  | Total bytes:       507m
 Bytes/second:    45084  | Total errors:        0  | Errors/minute:       0
 Total discards:      0  | Queue overflow:      0  | Multi/broadcast: 11618
 Collisions:          0  | Pause:               0  | Jumbo:           34510
 Cfg Up to Downs:     1  | TSO segments:        0  | TSO bytes:           0
 TSO6 segments:       0  | TSO6 bytes:          0  | HW UDP cksums:   11244
 HW UDP6 cksums:      0  | HW TCP cksums:       0  | HW TCP6 cksums:      0
 Mcast v6 solicit:    0  | Lagg drops:          0  | Lagg no buffer:      0
 Lagg no entries:     0
DEVICE
 Mcast addresses:     6  | Rx MBuf Sz:       4096
LINK INFO
 Speed:             100G | Duplex:            full | Flowcontrol:       full
 Media state:     active | Up to downs:          1 | HW assist:        5655

• Replacing the copper cable connecting e0b on both interconnect ports, but the problem is not resolved.