SubscribeEventgroupAck entry

• To acknowledge a SubscribeEventgroup entry, the SubscribeEventgroupAck entry shall be used and shall be used with the values as in the SubscribeEventgroup entry it answers.
  要確認(rèn)SubscribeEventgroup entry，應(yīng)使用SubscribeEventgroupAck entry，并應(yīng)與其回復(fù)的SubscribeEventgroup entry中的值一致。

• Service ID, Instance ID, Major Version, Eventgroup ID, TTL, Counter, and Reserved shall be the same value as in the Subscribe that is being answered.
  服務(wù)ID，實(shí)例ID，主要版本，事件組ID，TTL，計(jì)數(shù)器和保留位應(yīng)與正在應(yīng)答的Subscribe中的值相同。

• A SubscribeEventgroupAck entry shall set the TTL field to the value of the SubscribeEventgroup entry, it acknowledges.
  SubscribeEventgroupAck entry應(yīng)將TTL字段設(shè)置為它確認(rèn)的SubscribeEventgroup entry的值。

• SubscribeEventgroupAck entries referencing events and notification events that are transported via multicast shall reference an IPv4 Multicast Option and/or and IPv6 Multicast Option. The Multicast Options state to which Multicast address and port the events and notification events will be sent to.
  針對(duì)通過multicast傳輸?shù)膃vents和notification events的SubscribeEventgroupAck entry應(yīng)引用IPv4 Multicast Option和/或IPv6 Multicast Option 。Multicast Option表明notification event將會(huì)發(fā)送到哪個(gè)Multicast地址和port口。