in.dlmpd - DLMP 聚合探测守护进程
/usr/lib/inet/in.dlmpd
in.dlmpd 守护进程可对 DLMP 模式聚合执行基于探测器的故障和修复检测。
请注意，基于探测器的故障和修复检测将只在管理员为聚合配置了 probe-ip 链路属性后才会启动。Until then, the health of the underlying ports in the specific aggregation will solely depend on the link state of the port.
probe-ip 链路属性配置源地址以及可选目标地址的列表。IP addresses from this list, if configured as plumbed primary or as VNICs, will be used by in.dlmpd for ICMP probing.IPv4 和 IPv6 都受支持。IPv6 probe-ip addresses must be link-local.
Within a DLMP aggregation, each source IP address matching the probe-ip configuration is associated with an underlying port through which the inbound as well as outbound traffic, including the ICMP probes and their ACKs, of the source IP address is sent/received.in.dlmpd 守护进程定期向配置的目标发出单播 ICMP 包；如果未配置任何目标，in.dlmpd 将首先使用给定的源 IP 地址发出 ICMP 多播包来发现目标。通过监视 ICMP ack 的确认或丢失，in.dlmpd 守护进程可以确定与源 IP 地址关联的端口的运行状况。如果特定端口的所有目标都无法访问，则会将该端口声明为“ICMP 出现故障”。如果该端口至少有一个目标可通过 ICMP 探测器访问，则会将该端口标记为“ICMP 处于活动状态”。
根据 probe-ip 链路属性的配置方式以及配置的源 IP 地址与聚合端口的关联方式，可能会存在不与任何配置的 probe-ip 源 IP 地址关联的端口。
The health of those ports is determined by a different probe mechanism called transitive probes.in.dlmpd 守护进程定期在“ICMP 处于活动状态”的端口和未执行 ICMP 探测的端口之间发送/接收专用的第 2 层 (L2) 探测器。如果某个端口可以访问任何“ICMP 处于活动状态”的端口，则会将该端口声明为与该“ICMP 处于活动状态”的端口位于相同的“岛”上，并且也会将其视为处于活动状态。此状态称为“L2 处于活动状态”。
如果某个端口既不处于“ICMP 活动”状态又不处于“L2 活动”状态，则会将它声明为“失败”。It is claimed to be "active", or recovered, if it is either "ICMP active" or "L2 active".
如果所有底层端口都处于“出现故障”状态，则 in.dlmpd 守护进程会以循环方式将某个底层端口指定为“ICMP 探测者”以检测可能的恢复。所有 ICMP 探测器都会仅通过此端口发送。传递式探测会按之前的方式继续进行。一旦“ICMP 探测者”检测到 ICMP 探测器成功，该端口与其岛中的所有其他端口就都会“处于活动状态”。
in.dlmpd 守护进程服务由服务管理工具 smf(7) 管理，其服务标识符为：
svc:/network/dlmp:default
可以使用 svcadm(8) 来对此服务执行管理操作（如启用、禁用或请求重新启动）。
Note that the service will be enabled automatically as needed when a DLMP aggregation is created, and will be disabled if no DLMP aggregation is in use.Therefore, administrative actions on this service, such as enabling or disabling of the service, may be later changed accordingly based on the current status of the DLMP aggregation configuration.
有关下列属性的说明，请参见 attributes(7)：
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icmp(4P)、icmp6(4P)、attributes(7)、smf(7)、dladm(8)、dlstat(8)、svcadm(8)