Hi,
we have IPv6 duplicate addresses in IPv6 DHCP Server after IPv6 tracking enabled. This is for generating IPv6 addresses for IP-SGT bindings. The configuration is done in 3750-X (Release 15.2.4) through ipv6 snooping policy.
ipv6 snooping policy IPv6_POLICY_DEFAULT
tracking enable
vlan configuration 100
ipv6 snooping attach-policy IPv6_POLICY_DEFAULT
We have seen that IPv6 tracking is done with source :: and destination solicited multicast node address of the probed host. This is exactly the same the the host does in duplicate address detection after getting a renewing DHCP lease. If the switch tracks with probes and the host does DAD in the same time the host declines the address as duplicate, "BAD ADDRESS" is seen in DHCP server.
Is there any chance to delay the probes in IPV6 address tracking like in IPv4 ?
ip device tracking probe delay 10
All answers are appreciated.
Kerstin
