Hi Mike, On 2013/07/16 17:23 , Mike. wrote:
Static Enabled Probe Knows Probe Uses Last Static Address Given IPv6 V V V 2001:470:xxx:xxx::xxx DNS V V X 2001:470:20::2
Question #1: Why is there an "X" for DNS in the "Probe Uses" column? Is there something wrong with that DNS server?
The probe constructs an /etc/resolv.conf from either DHCP or the statically configured DNS resolvers. In practice it means that DHCP will win. When the probe connects to a controller it reports which DNS resolvers it is using. So the 'X' means that the probe is not using the DNS resolver you configured but instead uses the ones from DHCP.
"...As of now, we have no way of preventing the probe from accepting RAs. So if there is an IPv6 (rogue) RA on you network, it can/will override part of the static configuration. We're unsure if this will change in the future. ..."
I do have RA support on the subnet, though I would not classify it as "rogue". :) The RA provides the IPv6 prefix, prefix length, and the IPv6 address of the recursive DNS server. This RA support has been used by another box on the subnet, and it seems to work fine.
Question #2: Does the Atlas v3 probe use RA if they are present?
Yes. If the probe receives a RA that directs the probe to configure an address then it will just do that even if it already has a statically configure IPv6 address. Philip