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Network Port e0M is unstable and packet loss

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Category:
ontap-9
Specialty:
core
Last Updated:

Applies to

ONTAP 9

Issue

  • The network port e0M is unstable, a lots of errors of "vifmgr.portdown" can be observed in event log.
3/28/2025 16:00:01  Demo1n1 NOTICE     vifmgr.portdown: A link down event was received on node F14FAS2750TKSNAC1n1, port e0M.
3/27/2025 11:28:10  Demo1n1 NOTICE     vifmgr.portdown: A link down event was received on node F14FAS2750TKSNAC1n1, port e0M.
3/27/2025 10:38:51  Demo1n1 NOTICE     vifmgr.portdown: A link down event was received on node F14FAS2750TKSNAC1n1, port e0M.
  • There is only one count of "Up to Downs" in output of "ifstat -a".
- interface  e0M  (596 days, 21 hours, 7 minutes, 39 seconds) --

RECEIVE
Total frames:     1610m | Frames/second:      31  | Total bytes:       330g
Bytes/second:     6412  | Total errors:        0  | Errors/minute:       0
 Total discards:      0  | Discards/minute:     0  | Multi/broadcast:   174m
Non-primary u/c:     0  | Errored frames:      0  | Unsupported Op:      0
 CRC errors:          0  | Runt frames:         0  | Fragment:            0
 Long frames:         0  | Jabber:              0  | Length errors:       0
 Alignment errors:    0  | No buffer:           0  | Xon:                 0
 Xoff:                0  | Jumbo:               0  | Noproto:             0
 Error symbol:        0  | Illegal symbol:      0  | Bus overruns:        0
 Queue drops:         0  | LRO segments:        0  | LRO bytes:           0
 LRO6 segments:       0  | LRO6 bytes:          0  | Bad UDP cksum:       0
 Bad UDP6 cksum:      0  | Bad TCP cksum:       0  | Bad TCP6 cksum:      0
 Mcast v6 solicit:  286  | Lagg errors:         0  | Lacp errors:         0
 Lacp PDU errors:     0
TRANSMIT
Total frames:     2608m | Frames/second:      51  | Total bytes:      2877g
Bytes/second:    55801  | Total errors:        0  | Errors/minute:       0
 Total discards:      0  | Queue overflow:      0  | Multi/broadcast: 29070k
Collisions:          0  | Max collisions:      0  | Single collision:    0
 Multi collisions:    0  | Late collisions:     0  | Xon:                 0
 Xoff:                0  | Pause:               0  | Jumbo:             447m
Cfg Up to Downs:     0  | TSO non-TCP drop:    0  | Split hdr drop:      0
 Timeout:             0  | TSO segments:      448m | TSO bytes:        2493g
TSO6 segments:       0  | TSO6 bytes:          0  | HW UDP cksums:   50652k
HW UDP6 cksums:      0  | HW TCP cksums:    1152m | HW TCP6 cksums:      0
 Mcast v6 solicit:    0  | Lagg drops:          0  | Lagg no buffer:      0
 Lagg no entries:     0
DEVICE
Mcast addresses:     3  | Rx MBuf Sz:       4096
LINK INFO
Speed:            1000M | Duplex:            full | Flowcontrol:       full
Media state:     active | Up to downs:          1 | HW assist:        7710
  • Ping e0M ip from the other hosts, a lot of packet loss can be observed. 
  • There were multiple default routes with the same metric value on the e0M port

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