Data Domain：QLogic 卡造成的無效網路組態設定錯誤

Summary: TX 超時觸發了 QLogic 自動恢復機制，該機制將介面從配置的 MTU 9000 重置為預設的 MTU 1500;如果問題再次發生，我們可以手動還原 MTU 或保持使用預設值設定介面。

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Symptoms

警示將顯示： 

p0-4299   Thu Mar 12 06:47:09 2026   WARNING    Network   Interface Index=11:Setting=MTU   EVT-NETM-00003: Invalid network configuration setting on eth3c.
p0-4300   Thu Mar 12 06:47:10 2026   WARNING    Network   Interface Index=12:Setting=MTU   EVT-NETM-00003: Invalid network configuration setting on eth3d.


輸入 kernal.info 您將看到：  

Mar 12 06:47:03 xxxxxxxxxxxx kernel: [11647878.578944] (E4)[qede_tx_timeout:1023(eth3a)]Tx timeout!


Net show config 警示前與警示後輸出 

之前 

eth3c     Link encap:Ethernet  HWaddr xx:xx:xx:xx:xx:xx
          inet addr:x.x.x.x  Bcast:10.149.219.255  Mask:255.255.252.0
          inet6 addr: fe80::3680:dff:fec8:2302/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:9000  Metric:1
          RX packets:8265118 errors:0 dropped:391043 overruns:0 frame:0
          TX packets:6061371 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:11286254464 (10.5 GiB)  TX bytes:7765370042 (7.2 GiB)
          Interrupt:66 Memory:9f820000-9f83ffff

      
之後 

eth3c     Link encap:Ethernet  HWaddr xx:xx:xx:xx:xx:xx
          inet addr:x.x.x.x  Bcast:10.149.219.255  Mask:255.255.252.0
          inet6 addr: fe80::3680:dff:fec8:2302/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:8265118 errors:0 dropped:391043 overruns:0 frame:0
          TX packets:6061371 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:11286254464 (10.5 GiB)  TX bytes:7765370042 (7.2 GiB)
          Interrupt:66 Memory:9f820000-9f83ffff

Cause

此問題是由 TX 逾時所造成。儘管 QLogic TX 超時有自動恢復機制，但恢復過程會將網路介面重置為其預設配置。
在此案例中，Data Domain 的 MTU 設定為 9000，但在觸發自動復原時，介面設定會還原為預設的 MTU 值 1500。

Resolution

如果問題再次發生，我們可以手動將 MTU 重設為所需的值。 

net config ethXx mtu 1500 

Or 

net config ethXx mtu 9000


或者，我們可以將這些介面保留為預設 MTU 1500，以避免 MTU 在復原過程中遭到變更。

Affected Products

Data Domain
Article Properties
Article Number: 000486034
Article Type: Solution
Last Modified: 07 يوليو 2026
Version:  1
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