I enabled IPv6 on my AP9630 and noticed that the IAID is set to 2. This is strange. The IAID is a 4 octet field that's used to identify individual interfaces. The value is supposed to be unique for all of the interfaces of a particular device. If the device has only one interface, such as a mobile phone or this NMC, the IAID is not used and it's value should be zero. Does anyone know why it's set to 2 or if there is a way to clear it?
Here is a screen capture of the lease:
The values are the lease, the IAID, the DUID and the MAC.
Any thoughts from APC on this? Is the IAID set in a config file?
If we look at the SNMP interface table .220.127.116.11.18.104.22.168.1.1, it looks like 1 is loopback and 2 is ethernet. The stack is capable of additional interfaces.
It might help tech support to talk about why the non-zero IAID is a problem.
I also took a look at RFC3315. I see it requires IAIDs to be unique but I'm not sure were the single interface requirements are.
IAID has nothing to do with SNMP. It's for DHCPv6. It's not a "problem", but just unusual. If it's set to 2, there must be a setting somewhere. Normally for a device like this with only one interface, it should be zero. Again, not a show stopper, just strange. Why would someone set it to 2 rather than leave it null?
I see where you're coming from: Since it's a DHCP6-only identifier and only one interface uses DHCP, why would the IAID be two?
I think it went the other way around: they needed a unique interface identifier for DHCP6 and already had one. Ethernet is the second interface, and loopback the first.
DHCPv6 uses two unique identifiers. One is the DUID, which identifies the host. (There are 4 different types of DUID. The simplest is based on the MAC.) The other is the IAID, which identifies the interface on the host. The IAID is usually a 4 octet (32 bit) random number. If the device only supports one interface, the IAID is usually not used and left as zero.
I updated the firmware on the NMC today, hoping there might be some noticeable improvements or new features in the software, such as fixing this, but it's still the same.
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