e0a port flapping during MetroCluster IP installation

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Visibility:: Public

Votes:: 0

Category:: metrocluster

Specialty:: metrocluster

Last Updated:

Applies to

ONTAP 9
MetroCluster IP installation
AFF-A800
Optical transceivers X65405 100Gb
Cisco 9336 switches

Issue

e0a port flapping (Cluster LIF) during MetroCluster IP setup:

Example:

::> run local ifconfig -a:

-- interface  e0a  (12 days, 6 hours, 42 minutes, 46 seconds) --

RECEIVE
 Total frames:     2524m | Frames/second:    2379  | Total bytes:     21914g
 Bytes/second:    20655k | Total errors:        5  | Errors/minute:       0 
 Total discards:      0  | Discards/minute:     0  | Multi/broadcast:   474k
 Non-primary u/c:     0  | CRC errors:          0  | Long frames:         5 
 Jabber:              0  | Length errors:       0  | No buffer:           0 
 Pause:               0  | Jumbo:            2434m | Error symbol:        0 
 Bus overruns:        0  | LRO segments:      527m | LRO bytes:       21771g
 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:    0  | Lagg errors:         0  | Lacp errors:         0 
 Lacp PDU errors:     0 
TRANSMIT
 Total frames:      730m | Frames/second:     689  | Total bytes:       166g
 Bytes/second:      157k | Total errors:        0  | Errors/minute:       0 
 Total discards:      0  | Queue overflow:      0  | Multi/broadcast: 90205 
 Collisions:          0  | Pause:               0  | Jumbo:           13424k
 Cfg Up to Downs:     2  | TSO segments:     3591k | TSO bytes:       88063m
 TSO6 segments:       0  | TSO6 bytes:          0  | HW UDP cksums:   37193 
 HW UDP6 cksums:      0  | HW TCP cksums:     722m | HW TCP6 cksums:      0 
 Mcast v6 solicit:    0  | Lagg drops:          0  | Lagg no buffer:      0 
 Lagg no entries:     0 
DEVICE
 Mcast addresses:     2  | Rx MBuf Sz:       4096 
LINK INFO
 Speed:             100G | Duplex:            full | Flowcontrol:       none
 Media state:     active | Up to downs:         75 | HW assist:        5655

Event log showing lots of link up/down events:

Tue Dec 13 23:37:20 +0100 [srv01fas31: intr: netif.linkDown:info]: Ethernet e0a: Link down, check cable.
Tue Dec 13 23:37:30 +0100 [srv01fas31: intr: netif.linkUp:info]: Ethernet e0a: Link up.
Tue Dec 13 23:39:28 +0100 [srv01fas31: intr: netif.linkDown:info]: Ethernet e0a: Link down, check cable.
Tue Dec 13 23:39:38 +0100 [srv01fas31: intr: netif.linkUp:info]: Ethernet e0a: Link up.
Tue Dec 13 23:55:02 +0100 [srv01fas31: intr: netif.linkDown:info]: Ethernet e0a: Link down, check cable.
Tue Dec 13 23:55:12 +0100 [srv01fas31: intr: netif.linkUp:info]: Ethernet e0a: Link up.

Transceiver used on e0a is 332-00440 (X65405):

::> run local sysconfig -a:

slot 0: Dual 40/100G Ethernet T62100-MEZZ
		e0a MAC Address:    d0:39:ea:12:34:56 (auto-100g_sr4-fd-up)
		    QSFP Vendor:         FINISAR CORP   
		    QSFP Part Number:    332-00440       
		    QSFP Serial Number:  1234567