cHsrpExtSecAddrAddress 1.3.6.1.4.1.9.9.107.1.1.2.1.1

A secondary IpAddress for the {ifIndex, cHsrpGrpNumber} pair. As explained in the DESCRIPTION for cHsrpExtSecAddrEntry, a primary address must exist before a secondary address for the same {ifIndex, cHsrpGrpNumber} pair can be created.