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22.7 Legacy Series / ipv6: Interface Identifier equal on LAN and WAN
« on: August 19, 2022, 10:54:59 am »
Hi all,
A while ago I changed my config and use a Draytek Vigor 167 directly connected to my opnsense. My provider ist Deutsche Telekom and I have a SuperVectoring connection. I configured a pppoe interface on vlan7 on WAN. Moreover, I created another interface on WAN called Modem to access the Vigor if needed. I get a ipv6 prefix from my supplier and the sense builds the corresponding ipv6 interface identifier (IID) out of the MAC addresses for the full ipv6 address. I have my LAN assigned to igb0 (Mac address Xc:XX:XX:XX:21:ce) and my WAN assigned to igb1 (Mac address Xc:XX:XX:XX:21:cf). So far all is fine and running.
However when looking into the dashboard and the interface overview, it is since then obvious that my LAN and WAN interface have an identical IID. Both IIDs are derived from the LAN MAC address. As a consequence, LAN and WAN have:
Looking forward to your reply.
Br br
A while ago I changed my config and use a Draytek Vigor 167 directly connected to my opnsense. My provider ist Deutsche Telekom and I have a SuperVectoring connection. I configured a pppoe interface on vlan7 on WAN. Moreover, I created another interface on WAN called Modem to access the Vigor if needed. I get a ipv6 prefix from my supplier and the sense builds the corresponding ipv6 interface identifier (IID) out of the MAC addresses for the full ipv6 address. I have my LAN assigned to igb0 (Mac address Xc:XX:XX:XX:21:ce) and my WAN assigned to igb1 (Mac address Xc:XX:XX:XX:21:cf). So far all is fine and running.
However when looking into the dashboard and the interface overview, it is since then obvious that my LAN and WAN interface have an identical IID. Both IIDs are derived from the LAN MAC address. As a consequence, LAN and WAN have:
- the same link local address: fe80:XeXX:efff:XXXX:21ce
- the same IID for the public ipv6 address: 2003:<prefix_WAN>:XeXX:efff:XXXX:21ce resp 2003:<prefix_LAN>:XeXX:efff:XXXX:21ce
Looking forward to your reply.
Br br