who can explain source in source out after config ISP Redundancy(Primary/Backup) in multiISP reason

[Herschel_Liang]

Who can explain source in source out after config ISP Redundancy(Primary/Backup) in multiISP reason? Like IPv6 is not supported by ISP Redanduncy, is it exist a way to make source in source out come true in multiISP?

[_Val_]

Do you mean, Source in your network security policy rulebase?

[Herschel_Liang]

Such as: 2 ISP WAN links:A, B, inbound traffic come from ISPA, and then return from ISPA; inbound traffic come from ISPB, and then return from ISPB;