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LIF不再侦听DNS端口

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ontap-9
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适用场景

  • ONTAP 9
  • DNS

问题描述

  • ONTAP可保持DNS负载平衡。
  • DNS服务器发现以下错误。

connection refused resolving "domain.com/AAAA/IN" 192.168.200.1#53
connection refused resolving "domain.com./A/IN" 192.168.200.1#53

  • LIF不再侦听DNS端口。并观察DNS查询在数据包跟踪中是否收到ICMP端口不可访问的响应。

1    2022-04-15 12:00:55.172117   0.000000192.168.34.6192.168.200.1       DNS   81   标准查询0x0673 A domain.com
2    2022-04-15 12:00:55.172152   0.000035    192.168.200.1 192.168.34.6    ICMP  70   目标不可访问(端口不可访问)

  • DNS端口不可访问。

[root@centos ~]# telnet 192.168.200.1 53
Trying 192.168.200.1...
telnet: connect to address 192.168.200.1: Connection refused

 

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