We are looking at the cisco ASR920 routers platform running IOS 15.5(2)S
They seem to only report their IPv6 interface IP information in the IP-MIB (1.3.6.1.2.1.4.34)
Here is sample output from a lab router:
IP-MIB::ipAddressIfIndex.ipv4."5.0.0.22" = INTEGER: 3
IP-MIB::ipAddressIfIndex.ipv4."7.0.0.1" = INTEGER: 1
IP-MIB::ipAddressIfIndex.ipv4."8.0.0.22" = INTEGER: 10
IP-MIB::ipAddressIfIndex.ipv4."10.66.1.30" = INTEGER: 7
IP-MIB::ipAddressIfIndex.ipv4."10.66.1.45" = INTEGER: 2
IP-MIB::ipAddressIfIndex.ipv6."fd:63:a1:c0:a5:a2:00:22:00:00:00:00:00:00:00:02" = INTEGER: 3
IP-MIB::ipAddressIfIndex.ipv6."fd:63:a1:c0:a5:a2:01:22:00:00:00:00:00:00:00:01" = INTEGER: 10
IP-MIB::ipAddressIfIndex.ipv6z."fe:80:00:00:00:00:00:00:86:b8:02:ff:fe:ce:86:80%301989895" = INTEGER: 1
IP-MIB::ipAddressIfIndex.ipv6z."fe:80:00:00:00:00:00:00:86:b8:02:ff:fe:ce:86:80%301989903" = INTEGER: 10
IP-MIB::ipAddressIfIndex.ipv6z."fe:80:00:00:00:00:00:00:86:b8:02:ff:fe:ce:86:82%301989897" = INTEGER: 3
IP-MIB::ipAddressType.ipv4."5.0.0.22" = INTEGER: unicast(1)
IP-MIB::ipAddressType.ipv4."7.0.0.1" = INTEGER: unicast(1)
IP-MIB::ipAddressType.ipv4."8.0.0.22" = INTEGER: unicast(1)
IP-MIB::ipAddressType.ipv4."10.66.1.30" = INTEGER: unicast(1)
IP-MIB::ipAddressType.ipv4."10.66.1.45" = INTEGER: unicast(1)
IP-MIB::ipAddressType.ipv6."fd:63:a1:c0:a5:a2:00:22:00:00:00:00:00:00:00:02" = INTEGER: unicast(1)
IP-MIB::ipAddressType.ipv6."fd:63:a1:c0:a5:a2:01:22:00:00:00:00:00:00:00:01" = INTEGER: unicast(1)
IP-MIB::ipAddressType.ipv6z."fe:80:00:00:00:00:00:00:86:b8:02:ff:fe:ce:86:80%301989895" = INTEGER: unicast(1)
IP-MIB::ipAddressType.ipv6z."fe:80:00:00:00:00:00:00:86:b8:02:ff:fe:ce:86:80%301989903" = INTEGER: unicast(1)
IP-MIB::ipAddressType.ipv6z."fe:80:00:00:00:00:00:00:86:b8:02:ff:fe:ce:86:82%301989897" = INTEGER: unicast(1)
IP-MIB::ipAddressPrefix.ipv4."5.0.0.22" = OID: IP-MIB::ipAddressPrefixOrigin.3.ipv4."5.0.0.20".30
IP-MIB::ipAddressPrefix.ipv4."7.0.0.1" = OID: IP-MIB::ipAddressPrefixOrigin.1.ipv4."7.0.0.0".30
IP-MIB::ipAddressPrefix.ipv4."8.0.0.22" = OID: IP-MIB::ipAddressPrefixOrigin.10.ipv4."8.0.0.22".32
IP-MIB::ipAddressPrefix.ipv4."10.66.1.30" = OID: IP-MIB::ipAddressPrefixOrigin.7.ipv4."10.66.1.0".24
IP-MIB::ipAddressPrefix.ipv4."10.66.1.45" = OID: IP-MIB::ipAddressPrefixOrigin.2.ipv4."10.66.1.0".24
IP-MIB::ipAddressPrefix.ipv6."fd:63:a1:c0:a5:a2:00:22:00:00:00:00:00:00:00:02" = OID: IP-MIB::ipAddressPrefixOrigin.3.ipv6."fd:63:a1:c0:a5:a2:00:22:00:00:00:00:00:00:00:00".64
IP-MIB::ipAddressPrefix.ipv6."fd:63:a1:c0:a5:a2:01:22:00:00:00:00:00:00:00:01" = OID: IP-MIB::ipAddressPrefixOrigin.10.ipv6."fd:63:a1:c0:a5:a2:01:22:00:00:00:00:00:00:00:01".128
IP-MIB::ipAddressPrefix.ipv6z."fe:80:00:00:00:00:00:00:86:b8:02:ff:fe:ce:86:80%301989895" = OID: SNMPv2-SMI::zeroDotZero
IP-MIB::ipAddressPrefix.ipv6z."fe:80:00:00:00:00:00:00:86:b8:02:ff:fe:ce:86:80%301989903" = OID: SNMPv2-SMI::zeroDotZero
IP-MIB::ipAddressPrefix.ipv6z."fe:80:00:00:00:00:00:00:86:b8:02:ff:fe:ce:86:82%301989897" = OID: SNMPv2-SMI::zeroDotZero
IP-MIB::ipAddressOrigin.ipv4."5.0.0.22" = INTEGER: manual(2)
IP-MIB::ipAddressOrigin.ipv4."7.0.0.1" = INTEGER: manual(2)
IP-MIB::ipAddressOrigin.ipv4."8.0.0.22" = INTEGER: manual(2)
IP-MIB::ipAddressOrigin.ipv4."10.66.1.30" = INTEGER: manual(2)
IP-MIB::ipAddressOrigin.ipv4."10.66.1.45" = INTEGER: manual(2)
IP-MIB::ipAddressOrigin.ipv6."fd:63:a1:c0:a5:a2:00:22:00:00:00:00:00:00:00:02" = INTEGER: manual(2)
IP-MIB::ipAddressOrigin.ipv6."fd:63:a1:c0:a5:a2:01:22:00:00:00:00:00:00:00:01" = INTEGER: manual(2)
IP-MIB::ipAddressOrigin.ipv6z."fe:80:00:00:00:00:00:00:86:b8:02:ff:fe:ce:86:80%301989895" = INTEGER: linklayer(5)
IP-MIB::ipAddressOrigin.ipv6z."fe:80:00:00:00:00:00:00:86:b8:02:ff:fe:ce:86:80%301989903" = INTEGER: linklayer(5)
IP-MIB::ipAddressOrigin.ipv6z."fe:80:00:00:00:00:00:00:86:b8:02:ff:fe:ce:86:82%301989897" = INTEGER: linklayer(5)
IP-MIB::ipAddressStatus.ipv4."5.0.0.22" = INTEGER: preferred(1)
IP-MIB::ipAddressStatus.ipv4."7.0.0.1" = INTEGER: preferred(1)
IP-MIB::ipAddressStatus.ipv4."8.0.0.22" = INTEGER: preferred(1)
IP-MIB::ipAddressStatus.ipv4."10.66.1.30" = INTEGER: preferred(1)
IP-MIB::ipAddressStatus.ipv4."10.66.1.45" = INTEGER: preferred(1)
IP-MIB::ipAddressStatus.ipv6."fd:63:a1:c0:a5:a2:00:22:00:00:00:00:00:00:00:02" = INTEGER: preferred(1)
IP-MIB::ipAddressStatus.ipv6."fd:63:a1:c0:a5:a2:01:22:00:00:00:00:00:00:00:01" = INTEGER: preferred(1)
IP-MIB::ipAddressStatus.ipv6z."fe:80:00:00:00:00:00:00:86:b8:02:ff:fe:ce:86:80%301989895" = INTEGER: preferred(1)
IP-MIB::ipAddressStatus.ipv6z."fe:80:00:00:00:00:00:00:86:b8:02:ff:fe:ce:86:80%301989903" = INTEGER: preferred(1)
IP-MIB::ipAddressStatus.ipv6z."fe:80:00:00:00:00:00:00:86:b8:02:ff:fe:ce:86:82%301989897" = INTEGER: preferred(1)
IP-MIB::ipAddressCreated.ipv4."5.0.0.22" = Timeticks: (3559) 0:00:35.59
IP-MIB::ipAddressCreated.ipv4."7.0.0.1" = Timeticks: (3553) 0:00:35.53
IP-MIB::ipAddressCreated.ipv4."8.0.0.22" = Timeticks: (3546) 0:00:35.46
IP-MIB::ipAddressCreated.ipv4."10.66.1.30" = Timeticks: (3563) 0:00:35.63
IP-MIB::ipAddressCreated.ipv4."10.66.1.45" = Timeticks: (383854) 1:03:58.54
IP-MIB::ipAddressCreated.ipv6."fd:63:a1:c0:a5:a2:00:22:00:00:00:00:00:00:00:02" = Timeticks: (3560) 0:00:35.60
IP-MIB::ipAddressCreated.ipv6."fd:63:a1:c0:a5:a2:01:22:00:00:00:00:00:00:00:01" = Timeticks: (3548) 0:00:35.48
IP-MIB::ipAddressCreated.ipv6z."fe:80:00:00:00:00:00:00:86:b8:02:ff:fe:ce:86:80%301989895" = Timeticks: (3555) 0:00:35.55
IP-MIB::ipAddressCreated.ipv6z."fe:80:00:00:00:00:00:00:86:b8:02:ff:fe:ce:86:80%301989903" = Timeticks: (3548) 0:00:35.48
IP-MIB::ipAddressCreated.ipv6z."fe:80:00:00:00:00:00:00:86:b8:02:ff:fe:ce:86:82%301989897" = Timeticks: (3560) 0:00:35.60
IP-MIB::ipAddressLastChanged.ipv4."5.0.0.22" = Timeticks: (3559) 0:00:35.59
IP-MIB::ipAddressLastChanged.ipv4."7.0.0.1" = Timeticks: (3553) 0:00:35.53
IP-MIB::ipAddressLastChanged.ipv4."8.0.0.22" = Timeticks: (3546) 0:00:35.46
IP-MIB::ipAddressLastChanged.ipv4."10.66.1.30" = Timeticks: (3563) 0:00:35.63
IP-MIB::ipAddressLastChanged.ipv4."10.66.1.45" = Timeticks: (383854) 1:03:58.54
IP-MIB::ipAddressLastChanged.ipv6."fd:63:a1:c0:a5:a2:00:22:00:00:00:00:00:00:00:02" = Timeticks: (8192) 0:01:21.92
IP-MIB::ipAddressLastChanged.ipv6."fd:63:a1:c0:a5:a2:01:22:00:00:00:00:00:00:00:01" = Timeticks: (3549) 0:00:35.49
IP-MIB::ipAddressLastChanged.ipv6z."fe:80:00:00:00:00:00:00:86:b8:02:ff:fe:ce:86:80%301989895" = Timeticks: (8023) 0:01:20.23
IP-MIB::ipAddressLastChanged.ipv6z."fe:80:00:00:00:00:00:00:86:b8:02:ff:fe:ce:86:80%301989903" = Timeticks: (3549) 0:00:35.49
IP-MIB::ipAddressLastChanged.ipv6z."fe:80:00:00:00:00:00:00:86:b8:02:ff:fe:ce:86:82%301989897" = Timeticks: (8092) 0:01:20.92
IP-MIB::ipAddressRowStatus.ipv4."5.0.0.22" = INTEGER: active(1)
IP-MIB::ipAddressRowStatus.ipv4."7.0.0.1" = INTEGER: active(1)
IP-MIB::ipAddressRowStatus.ipv4."8.0.0.22" = INTEGER: active(1)
IP-MIB::ipAddressRowStatus.ipv4."10.66.1.30" = INTEGER: active(1)
IP-MIB::ipAddressRowStatus.ipv4."10.66.1.45" = INTEGER: active(1)
IP-MIB::ipAddressRowStatus.ipv6."fd:63:a1:c0:a5:a2:00:22:00:00:00:00:00:00:00:02" = INTEGER: active(1)
IP-MIB::ipAddressRowStatus.ipv6."fd:63:a1:c0:a5:a2:01:22:00:00:00:00:00:00:00:01" = INTEGER: active(1)
IP-MIB::ipAddressRowStatus.ipv6z."fe:80:00:00:00:00:00:00:86:b8:02:ff:fe:ce:86:80%301989895" = INTEGER: active(1)
IP-MIB::ipAddressRowStatus.ipv6z."fe:80:00:00:00:00:00:00:86:b8:02:ff:fe:ce:86:80%301989903" = INTEGER: active(1)
IP-MIB::ipAddressRowStatus.ipv6z."fe:80:00:00:00:00:00:00:86:b8:02:ff:fe:ce:86:82%301989897" = INTEGER: active(1)
IP-MIB::ipAddressStorageType.ipv4."5.0.0.22" = INTEGER: nonVolatile(3)
IP-MIB::ipAddressStorageType.ipv4."7.0.0.1" = INTEGER: nonVolatile(3)
IP-MIB::ipAddressStorageType.ipv4."8.0.0.22" = INTEGER: nonVolatile(3)
IP-MIB::ipAddressStorageType.ipv4."10.66.1.30" = INTEGER: nonVolatile(3)
IP-MIB::ipAddressStorageType.ipv4."10.66.1.45" = INTEGER: nonVolatile(3)
IP-MIB::ipAddressStorageType.ipv6."fd:63:a1:c0:a5:a2:00:22:00:00:00:00:00:00:00:02" = INTEGER: other(1)
IP-MIB::ipAddressStorageType.ipv6."fd:63:a1:c0:a5:a2:01:22:00:00:00:00:00:00:00:01" = INTEGER: other(1)
IP-MIB::ipAddressStorageType.ipv6z."fe:80:00:00:00:00:00:00:86:b8:02:ff:fe:ce:86:80%301989895" = INTEGER: other(1)
IP-MIB::ipAddressStorageType.ipv6z."fe:80:00:00:00:00:00:00:86:b8:02:ff:fe:ce:86:80%301989903" = INTEGER: other(1)
IP-MIB::ipAddressStorageType.ipv6z."fe:80:00:00:00:00:00:00:86:b8:02:ff:fe:ce:86:82%301989897" = INTEGER: other(1)
