问：关于APN重定向（即APN纠错）

hycl5410

这里写的倒是比较清楚
Supplementary Configuration
For activating the feature, the following supplementary configuration is required:

For configuring the SGSN default APN, that is, the Gn_DefaultAPNGSMNetwork and Gn_DefaultAPNUMTSNetwork node properties, use the set_nodeprop CLI command.
For a single subscribed APN with the same PDP type or the same PDP type and PDP address with the requested APN, the SGSN_ApnRedirectToSubscribedApn node property can be configured to have the incorrect requested APN substituted by the single subscribed APN. Configure the SGSN_ApnRedirectToSubscribedApn node property, by using the set_nodeprop CLI command.
For multiple subscribed APNs with the same PDP type or the same PDP type and PDP address with the requested APN, the SGSN_ApnRedirectForMultipleApn node property can be configured to have the incorrect requested APN substituted by the SGSN default APN (when the SGSN default APN is included in the subscribed APN) or one of the subscribed APN that is not a wildcard. Configure the SGSN_ApnRedirectForMultipleApn node property, by using the set_nodeprop CLI command.

hycl5410

另外提一句
For multiple subscribed APNs with the same PDP type or the same PDP type and PDP address with the requested APN, the SGSN_ApnRedirectForMultipleApn node property can be configured to have the incorrect requested APN substituted by the SGSN default APN (when the SGSN default APN is included in the subscribed APN) or one of the subscribed APN that is not a wildcard. Configure the SGSN_ApnRedirectForMultipleApn node property, by using the set_nodeprop CLI command.
如果签约a,b,c, SGSN default d，请求e，在开redirect功能以及配置正确的情况下，选哪一个？随机还是固定为第一个签约（a）？