DNS超时发生原因secd.ldap.noServers消息、每4小时发送一次

适用场景

• ONTAP 9.  
• SMB
• 域发现
• LDAP

问题描述

• EMS日志中每4小时显示以下错误：

Sun May 15 12:29:54 HKT [nodeA: secd: secd.ldap.noServers:EMERGENCY]: None of the LDAP servers configured for Vserver (NAS11) are currently accessible via the network for LDAP service type (Service: LDAP (Active Directory), Operation: SiteDiscovery).

• DNS查找失败：

Sun May 15 20:15:39 HKT [nodeA2: secd: secd.dns.server.timed.out:error]: DNS server 10.0.0.10 did not respond to vserver = NAS11 within timeout interval.
Sun May 15 20:15:48 HKT [nodeA2: secd: secd.dns.srv.lookup.failed:error]: DNS server failed to look up service (_ldap._tcp.dc._msdcs.local.domain.net) for vserver (NAS11) with error (Operation timed out).

• 每个DC都有DNS指针(PTR)记录、这些记录指向正确的主机名