「ctdpktloss」/クラスタLIFからのping時にパケットが継続的に失われます

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Category:: fas-systems<a>2009552039</a>

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環境

AFF / FAS システム
ONTAP 9.x
Ciscoクラスタネットワークスイッチ

問題

system health alert show コマンドで次のエラーが報告されます。

Node:NetApp1

Resource: Ethernet1/10

Severity: Major

Indication Time: Mon Apr 24

13:01:43 2023

Suppress: false

Acknowledge: false

Probable Cause: The percentage of inbound packet errors of switch

interface "int/Ethernet1/10"

is above the warning threshold.

Possible Effect: Communication between nodes in the cluster might be

degraded.

EMSで報告されるエラーは次のとおりです。

[?] Mon May 01 01:06:49 +0530 [NetApp-node1: cshmd: hm.alert.raised:alert]: Alert Id = ClusterIfInErrorsWarn_Alert , Alerting Resource = switch-01(XXXXXXXXXXX)/Ethernet1/10 raised by monitor ethernet-switch

[?] Mon May 01 01:06:49 +0530 [NetApp-node1: cshmd: hm.alert.raised:alert]: Alert Id = ClusterIfInErrorsWarn_Alert , Alerting Resource = switch-01(XXXXXXXXXXX)/Ethernet1/9 raised by monitor ethernet-switch

[?] Mon May 01 01:06:49 +0530 [NetApp-node1: cshmd: hm.alert.raised:alert]: Alert Id = ClusterIfOutErrorsWarn_Alert , Alerting Resource = switch-01(XXXXXXXXXXX)/Ethernet1/7 raised by monitor ethernet-switch

[?] Mon May 01 01:06:49 +0530 [NetApp-node1: cshmd: hm.alert.raised:alert]: Alert Id = ClusterIfOutErrorsWarn_Alert , Alerting Resource = switch-01(XXXXXXXXXXX)/Ethernet1/8 raised by monitor ethernet-switch

[?] Mon May 01 01:08:42 +0530 [NetApp-node1: vifmgr: vifmgr.cluscheck.ctdpktloss:alert]: Continued packet loss when pinging from cluster lif xxx (node NetApp-node1) to cluster lif xyx (node NetApp-node3).

[?] Mon May 01 01:08:53 +0530 [NetApp-node1: vifmgr: vifmgr.cluscheck.ctdpktloss:alert]: Continued packet loss when pinging from cluster lif xxy (node NetApp-node1) to cluster lif xyx (node NetApp-node3).

スイッチポートのMTUは、show interfaceの出力で1500に設定されています。

switch-01# show interface <interface name>

Ethernet1/8 is up
 admin state is up, Dedicated Interface
 Hardware: 1000/10000/25000/40000/50000/100000 Ethernet, address: 806a.0023.eaf4 (bia 806a.0023.eaf4)
 MTU 1500 bytes, BW 40000000 Kbit , DLY 10 usec
 reliability 255/255, txload 1/255, rxload 1/255
 Encapsulation ARPA, medium is broadcast

ストレージ側ではMTUサイズが9000に設定され、 net port show CLIの出力で同じことを確認できます