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Hmmnow my LAN DHCPv4 leases are no longer working. SLAAC works fine, wan6 or wan_6 interface (option ipv6 in pppoe-wan 1 or auto, tried them both) has a correct IPv6 and can see it works with pings etc. IPv6 multicast. Maybe there is a problem with netifd/ubus (or something else) where the reporting/handling of prefix delegation is bugged. But I think this is not the case, the rules are applied before the network is started. proftDecember 25, 2020, 8:52pm #1 LinkSys WRT32X with latest OpenWrt 19.07.5 r11257, Spectrum cable Internet. So this is why input rules for the wan zones are needed. Firewall gets started (default policy set to DROP, network is not up/configured yet). I'm also not sure how to configure the auto spawned wan_6 interface. Using the basic algorithm: PD Address Space / Number of LAN Ports = block size per port. Is this correct. I'll need to discuss it with them tomorrow as well. If your . So if you set 1492 as MTU, eth0 MTU will be 1492 and Default rules apply to interfaces that are not assigned to any zone. "auto" is default Maybe try a number value instead of "auto". (for example, dhcpv4/6) Most home routers have 4 LAN ports, so that a /56 will be divided into /60s to be allocated to the first tier of routers (Router A, Router B, Router C). odhcpd is a daemon for serving and relaying IP management protocols to configure clients and downstream routers. Do you see anything of interest in logread after ifdown wan; ifup wan ? Is there any way to get some live debug output to see what might be going on? Well, I had a packet capture which shows blocked ports beforehand and DHCPv6 enabled over PPPoE afterwards, after enabling those two rules. Then they will end up with wan6 and wan_6, which I don't think is a good idea. (/lib/netifd/dhcpv6.script). Sections of type interface define on which interfaces delegated prefixes are added and how they're aggregated. PPPOE for the IPv4 wan, SLAAC on IPv6 wan, and DHCPv6 for prefix delegation. I currently have DHCPv6 working perfectly like this on my openwrt router, but when trying to test on Windows Server 2012 R2 or Windows Server 2016, it seems I can only create DHCPv6 scopes with a /64 prefix delegation. 11 comments. [Edit: Thanks for the tip on adding 'tcpdump'; I've added capture output below]. Abstract. Self-registration in the wiki has been disabled. New replies are no longer allowed. Tracing packets was easy once tcpdump was installed. (if the default input policy is set to drop/reject) NAT64 for IPv6-only networks. The loopback interface gets the first subnet assigned, lan the second. The hint is hex from 0-F. 3. They are ACCEPT/REJECT, but should not matter, as interfaces are assigned in wan zone. The OPNsense LAN interface is split up using 802.1Q VLAN tags for different trust groups, e.g. For prefix delegation to work downstream, there should be several /64 prefixes available (at least two, so that the Openwrt router would keep one for itself and its WAN side (=modem side) and assign the other for its LAN). (non-bridged) interfaces in case no delegated prefixes are available. Very strange but it's been stable for a while now and I had zero success before the firewall changes. That is what my ISP told me as well, they had trouble with autoconfiguration too. leave your radvd with default config. However I am getting the following odhcp6c error: daemon.err odhcp6c[21313]: Failed to send RS (Address . No, he didn't mention the version, however I guess that he used the latest. Or create a new interface wan_6 section and use the same options/settings as wan6 does? So there must have been something blocking the DHCPv6 packets in the firewall due to the bridge interface? MTU = 1500 is the proper value here if you want a 'pppoe mtu of 1492' The WAN interfaces came bridged that way out of the box, in the default configuration. And with what have you bridged the eth1.2 ? The key is to set dhcpv6-pd prefix-only so we only request an prefix via dhcpv6 and get our ipv6-address for eth0 via slaac WORKING CONFIG TO REQUEST AN /62 via IPv6-PD on Edgerouter-X on v1.10 If you want to contribute to the OpenWrt wiki, please post HERE in the forum or ask on IRC for access. By using the website, you agree with storing cookies on your computer. Not sure if this was some defense measure from the ISP. It will work both for uplinks supporting DHCPv6 with Prefix Delegation and those that don't support DHCPv6-PD or DHCPv6 at all (SLAAC-only). I think tcpdump 'sees' traffic before iptables, at least for inbound traffic. A number of ddwrt users , myself included prefer dnsmasq over radvd. Does it work now? I may have a fiddle at some stage. Had IPv6 working great with DD-WRT on this device using DHCPv6 w/Prefix Delegation, prefix length /64, Radvd enabled. Because it is sent via multicast? You cannot configure the auto spawned wan_6 indeed. Now all is well. When you search for odhcp6c in the luci process overview (or 'ps | grep odhcp6c' in terminal), what parameters/flags are applied to it? I did not set anything up myself in this regard. Ive sent details of my config to my ISP and they are investigating their end. I have added the firewall rules shown above as those seemed to be the crucial part which was missing for a dynamic DHCPv6 PPP-based connection. The setup should be quite simple. I have banip, but it is auto-adding the link local IP of my ISP in the white list. The OpenWrt community is proud to announce the first release candidate of the upcoming OpenWrt 19.07 stable version series. Do you have any other (alias) interfaces configured on eth0? It incorporates over 3700 commits since branching the previous OpenWrt 18.06 release and has been under development for about one a half years. I suggest to do a reset of the device to defaults and start from scratch. (-Ntry ?). If you do not agree leave the website. This website uses cookies. I followed various advice given in https://openwrt.org/docs/guide-user/network/ipv6/start and other pages including adding new ip6tables rules for DHCPv6 UDP port 546/547, but I can't get the br-wan6 interface to go live and acquire an IPv6 IP. Are sure 60 will work? wan is not bridged by default, nor is it needed to allow dhcp. Perhaps it is an interface name thing - your "ipv6 option auto"==wan_6 compared to my "ipv6 option 1" == wan6. This topic was automatically closed 10 days after the last reply. My ISPs DHCPv6 is a bit broken so most of my testing is with a static IPv6 on the wan. I just configured the wan and default input to ACCEPT. Been fighting this for a while now. By default, all INPUT traffic is allowed (for every zone and can individually be overwritten per zone) Running LEDE 17.01.4 on a WR2543N. I noticed that in the config snipet that my ISP sent me there was no mtu=1492 in the wan interface. And then configure all the settings in the interface wan6 section. Doesn't matter. Hello all, I recently managed to get IPv6 from my ISP, so I could drop HE tunnel. Topic: How to Configure DHCPv6 client with prefix delegation on a :: /64 link When the zone rules are only get applied when an interface in that zone comes up then odhcp6c can never receive the advertise message. With my edgerouter x. I just use the wizard enable DHCPv6 with Prefix Delegation /60 and I would get IPv6 and just works..but with OPENWRT I can get IPv6..but it's not working..help please..thanks. There is also no 'tcpdump' on this build so I can't inspect the raw network traffic. Yes, change 1 to auto - they have different meanings. Normally it will be shown under "IPv6 WAN Status" in the "Network" section like. Make sure you have a big terminal window then it's a simple expression to filter the output to leave DHCPv6 over PPPoE. Do you have any other (alias) interfaces configured for eth0? Content may be missing or not representing the latest edited version. Had to re-enable the "br-lan" interface and combine eth0.1, wlan0, and wlan1 so that DHCP would work again. I don't see any dhcp6 solicit to start with. the ppp daemon gets launched with mtu 1492, I can manually insert a prefix and that gets delegated but the automatic Prefix Delegation that should 'just work' isn't working. Lo and behold, IPv6 now obtains an IP! IPv6 extras. Sometimes delegation doesn't work, then it starts working again. OpenWrt 19.07.0 first release candidate Installing and Using OpenWrt 14941 root 1028 S odhcp6c -s /lib/netifd/dhcpv6.script -Ntry -P0 -t120 pppoe-wan. Do you have banip, bcp38 or similar packages installed? The RG receives a /60 PD to a dhcpv6 IA-PD request it makes on its WAN interface from the broadband gateway router in the ISP network. Pinging IPv6 hosts from the router works as expected. But those rules are applied only when the wan/wan6 interface is up. On the OPNsense WAN interface it has a static IPv4 and does DHCPv6 with prefix delegation. This example requests a /56 sized prefix and DNS servers on wan and configures two /64 subnets out of the prefix on lan and loopback. I have made it work, with a few workarounds. It will try to acquire ipv6 for itself and a prefix for the lan. In which configuration stanza? The DHCP address on the PPPoE tunnel appears on wan instead of wan6 and nothing else happens, there isn't even a IPv6 route created. IPv6 DHCPv6 Prefix Delegation Configuration ISP Customer Routers C1 C2 Hosts Verification ISP Customers C1 C2 The prefix delegation feature lets a DHCP server assign prefixes chosen from a global pool to DHCP clients. They offer /56 which is visible in the packet capture, but it doesn't even install that one under ifstatus wan6, let alone adding it under lan interface. and launches the ppp daemon with the mtu specified. Just like the LAN(br-lan) interface which is in the "lan" firewall zone. Maybe it broke something that went unnoticed. The valid options of this section are listed blow. ISP: AT&T Fiber in U.S.A ISP Provided Gateway: Pace 5268ac Router: Netgear R7800 running OpenWrt 22.03-SNAPSHOT r19235-d0965dc174 / LuCI openwrt-22.03 branch git-22.083.69105-af8e91c I tried setting up a macvlan interface to request separate IPv6 /64 Prefix from the AT&T Pace 5268ac Gateway. The eth0 MTU was 1492 and pppoe-wan 1484. Obtain IPv6 public network delegation in OpenWrt. Temporarily, i.e for about a minute, I can see in ifstatus that wan6 has the PD, but valid timer is less than a minute and soon is vanished. If there are still problems you can post the following for troubleshooting. I've tried this but get no output: odhcp6c -v br-wan6 -P 0 -N force, There is also no 'tcpdump' on this build so I can't inspect the raw network traffic. Offtopic question. Then reboot the device. Wish I knew why DHCPv6 was blocked as well, I found one other person who mentioned this so I'm wondering if it's the way an ISP deploys DHCPv6? Override the DUID used for DHCPv6 requests. This HOWTO explains how to configure OpenWrt to: Enable IPv6 on the Freebox. I can ping 8.8.8.8 from hosts. PPPOE for the IPv4 wan, SLAAC on IPv6 wan, and DHCPv6 for prefix delegation. Strange, banip doesn't whitelist any upstream ipv6 addresses. So I rebooted the device. I am under the same impression, that tcpdump will capture traffic on the wire. IPv6 WAN Status Type: dhcpv6-pd Prefix Delegated: 2001:db8:1234:5678::/56 Address: 2001:db8::abcd/128 [] However I would like to . I had tried them both options, with auto (wan_6) and manual (wan6). What prefix length does your isp provide? I have a support ticket with my ISP open already. Now, what happens when someone changes the default input policy to drop/reject? That applies to ingress traffic. What prefix length does your isp provide? The prefix delegation occurs between a provider edge (PE) device and customer premises equipment (CPE) using the DHCPv6 prefix delegation option. This rule is not needed, you are not running a dhcp6 server on the wan interface, are you? However OpenWrt should reply with a request, instead it sends again solicit, server sends advertise and this continues indefinitely. Do the settings from wan6 also apply to wan_6? Other than the usual PPPoE negotiation and some failed DHCPv6 requests on the LAN side there's nothing. Too much confidence I guess and I got carried away from other operating systems. With prefix delegation, a delegating router (the BNG) delegates IPv6 prefixes to a requesting router (the CPE). odhcpd provides server services for DHCP, RA, stateless and stateful DHCPv6, prefix delegation and can be used to relay RA, DHCPv6 and NDP between routed. This is usually a user error. but because of the 8byte overhead of pppoe the actual mtu will be 1484. I have connected my travel router to my mother-in-law's . In wan zone input is dropped/rejected, so you do need specific allow rules for the DHCPv4/v6, ICMPv6, and other flows. I need some more packet tracing practice and learn better with real problems. a 'trusted' VLAN for workstations, an 'IOT' VLAN and a 'guest' VLAN. His testing router (tp-link, not OpenWrt) successfully concluded the DHCPv6 sequence, while mine is stuck in the first 2 steps. CC Attribution-Share Alike 4.0 International, Specifies whether the DHCPv6 client should be started on boot, Enables additional debug information in the system log, Requests prefix delegation at the DHCPv6 server, Requests a permanent, non temporary address at the DHCPv6 server, Signalize a rapid commit two message exchange (, Request Network Information Service (NIS) server address (, Request Network Information Service (NIS) domain name (, Request Network Information Service V2 (NIS+) server address (, Request Network Information Service V2 (NIS+) domain name (, Request Broadcast and Multicast Control Service (BCMCS) address (, Request Broadcast and Multicast Control Service (BCMCS) domain name (. Are sure 60 will work? But how can an MTU issue break delegation and not everything else also? I also have a Mikrotik device with dhcpv6 client and I would like to setup my OpenWRT to delegate prefix (/48 I got from HE) to be splitted to /60 to that mikrotik. How to use OpenWrt behind a Freebox Crystal with IPv6 bridge, How to use OpenWrt behind a Freebox with IPv6 delegation, CC Attribution-Share Alike 4.0 International. A typical default configuration consists of one dhcp6c section with common settings and one or more interface sections, usually covering the lan and loopback networks. The problem seems to be with DHCPv6. //edit For an uplink with native IPv6-connectivity you can use the following example configuration. Path of script which is executed when a reply is received, Specifies whether a prefix should be added on this interface. The DHCP client can then configure an IPv6 address on its LAN interface using the prefix it received. Here are config snippets that may be helpful: Thanks for the tip on adding 'tcpdump'. The WAN(br-wan) and WAN6(br-wan) interfaces are part of the "wan" firewall zone which consists of "wan:" and "wan6:". However, I think I was getting DHCPv6 responses with ''option ipv6 1'' and ''option proto dhcpv6'' on wan6. I will have a play once I am allowed to fiddle with the router. With tcpdump I can see solicit from OpenWrt and advertise from server. If not, what is blocking it? It defines basic properties and interface settings. Regarding why it broke delegation and not something else, I have no idea. Basic Properties Multiple configurations exist but for my ISP using a fiber connection with an IPv4 PPPoE connection encapsulating DHCPv6 advertisement/solicitation this was required. I have the same issue. DHCPv6-PD should work by default on OpenWrt. opkg update opkg upgrade odhcpd-ipv6only Pico July 27, 2021, 7:17am #14 on your downstream router, there is the "Request IPv6 prefix length" setting on the WAN interface on the "General Settings" tab. At least this is how I interpret it. 1 will enable IPCP6 negotiation but nothing else, you'll need to manually configure a DHCPv6 interface then. Does delegation work when you restart the wan6 interface? The /etc/config/dhcp6c file controls the WIDE-DHCPv6 client package wide-dhcpv6-client configuration. Does this also apply to dhcpv6 traffic? You may also want to look at using dnsmasq for your RAs / dhcpv6 oprions etc instead of radvd + dhcp6s. OpenWrt Prefix Delegation address allocation has its roots in HomeNet RFC 7368. Did you disable/modify the default dhcpv6 firewall rule? its the network.wan6.reqprefix='auto' in your text listing. Maybe it is a problem with the latest version. Not sure if this was some defense measure from the ISP, //edit I already have "option ipv6 '1'" in the wan interface inside /etc/config/network. Using LEDE 17.0.1.4. However, machines inside the network are only setting up link-local IPv6 addresses, so the SLAAC doesn't seem to be doing its thing. Had IPv6 working great with DD-WRT on this device using DHCPv6 w/Prefix Delegation, prefix length /64, Radvd enabled. odhcpd provides server services for DHCP, RA, stateless SLAAC and stateful DHCPv6, prefix delegation and can be used to relay RA, DHCPv6 and NDP between . That applies to ingress traffic. Maybe OpenWRT will fallback to a different prefix length but I'm also not sure about this one. However when I run 'ifstatus wan' I see the IPv6 address associated to the wan interface and nothing appears on wan6. The section of type dhcp6c named basic defines common client settings. I wasn't questioning that you need firewall rules. Except where otherwise noted, content on this wiki is licensed under the following license:CC Attribution-Share Alike 4.0 International. Well, I had a packet capture which shows blocked ports beforehand and DHCPv6 enabled over PPPoE afterwards, after enabling those two rules. I have configured wan and wan6 as interfaces in banip. After looking https://wiki.openwrt.org/doc/uci/network6#downstream_configuration_for_lan-interfaces I tried to make couple changes to my /etc/config/network file to look like this When you send any egress traffic, the firewall is tracking the connection and allows the reply in. It tries to follow the RFC 6204 requirements for IPv6 home routers. The original post can be found on the forum . It also provides initial support for the new ath79 target, the. Namely: But still if someone has any idea, I am all ears. Even though the tcpdump log shows the dhcpv6 response from the server, I think tcpdump 'sees' traffic before iptables, at least for inbound traffic. However, I think I was getting DHCPv6 responses with option ipv6 1 and option proto dhcpv6 on wan6. It defines basic properties and interface settings . Filter IPv6 incoming traffic. The documentation for IPv6 doesn't mention wan_6 dynamically created interfaces. https://openwrt.org/docs/guide-user/network/wan/isp-configurations. With tcpdump I can see solicit from OpenWrt and advertise from server. Also make sure that your lan interface has option ip6assign 64 (or a larger prefix size) set to actually redistribute the received prefix downstream. Extensions to DHCPv6 also enable prefix delegation, through which an ISP can automate the process of assigning prefixes to a customer for use within the customer's network. (by default there should be one) They use ipv6 'auto' and then do the configuration on the wan6 interface. Any ideas what is happening? I ended up using "option ipv6 1" with a static wan6 interface. And it was my wrong to use it without checking first documentation or the "ip link". I have a Linksys router running OpenWRT 18.06.5, and am getting an IP address and a prefix delegation from my ISP (Comcast). Maybe I missed some update. Is there a valid reason to bridge the wan interface? Weird, cause the IPv4 worked for years with this setting, and it is something I automatically configure in pppoe interfaces. So, say your isp gave you this for your prefix def: 2001:db8:face:dad0::/60, your first subnet you can give to an interface is 2001:db8:face:dad0::/64, then 2001:db8:face:dad1::/64, then 2001:db8:face:dad2::/64, etc. In wan zone input is dropped/rejected, so you do need specific allow rules for the DHCPv4/v6, ICMPv6 and other flows. prefix ::/56 infinity; So the first thing I would do is use a custom dhcp6c config using the above example. I've tried about every combination. MX Series,M320,M120. LinkSys WRT32X with latest OpenWrt 19.07.5 r11257, Spectrum cable Internet. What I was trying to say was when are the (wan) zone rules are applied? Setting it to auto will spawn a virtual interface wan_6 (note the underscore) which takes care of the prefix assignment. report. I have PPPoE as well. Also you acknowledge that you have read and understand our Privacy Policy. I can ask him next time we talk, it got already midnight here. Sections A typical default configuration consists of one dhcp6c section with common settings and one or more interface sections, usually covering the lan and loopback networks. Is there no config interface wan6 section in your network config? All defined options of this section are listed below. WAN zone has default INPUT policy of DROP. Setting it to auto will spawn a virtual interface wan_6 (note the underscore) which takes care of the prefix assignment. I'm assuming I've done something dumb. For v4 as well, the reply is not coming from the same address it was sent to. I tried to remove it too and it worked! I'm also not sure how to configure the auto spawned wan_6 interface. I deleted the option and now everything is correct, eth0 1500 and pppoe-wan 1492. Are there different means of allocating ipv6 addresses besides DHCPv6? How to use OpenWrt behind a Freebox with IPv6 delegation. Seems your issue is not with the configuration then, maybe an incompatibility between odhcp6c and your ISP? Looks like for all the world like DHCPv6 requests are not going through the PPPoE link. If you want to contribute to the OpenWrt wiki, please post HERE in the forum or ask on IRC for access. This time I could see solicit, advertise, request and reply. IPv6 on L2TP softwire. I have expanded it with some of the information above. Behavior remains the same, Solicit and Advertise only. wan/wan6 sends dhcp request but can't receive the response because the wan/wan6 zone input allow rules are not yet applied. I removed the wan6 interface but wan_6 is behaving the same as wan6 was: Looks like no address is being allocated. Try "option ipv6 auto", this should automatically spawn a virtual DHCPv6-PD interface. This will set the assigned subnet of the /60. But I suppose that if something that important was buggy, it would affect others too. So 60 should work fine. Did you set option ip6assign on your lan interface? In May 2018, the OpenWrt forum suffered a total data loss. I installed tcpdump and captured the output when restarting the wan6 interfaces (ifdown wan6; ifup wan6): Found the problem. So you already tried the following config and it didn't work? This archive is an effort to restore and make available as much content as possible. If no, maybe something else is hindering odhcp6c from receiving the advertise message or I'd say it was even worse, as I noticed that with 'reqaddress force' I don't even get an address on the wan. share. Or do you have to set option ipv6 '1' instead of 'auto' in the interface wan section? My ISP doesn't delegate an IPv6 prefix and I get a default /64 with my IPv6 addresses from my provider's CPE/Router. I need some more practice with packet capture and interpretation. I understand there are default wan6 firewall rules. I think the option mtu statement sets the MTU for physical interface I did not set anything up myself in this regard. But I'm not sure about this. If you use the auto in ipv6 option in wan interface, then wan_6 is created automatically and you cannot configure it. The WAN interfaces came bridged that way out of the box, in the default configuration. I just tried with a recently flashed Carambola2 on 18.06.5 that I keep spare. The problem seems to be with DHCPv6. IPv6 configuration. Maybe you have to edit a script to enable it. DHCPv6 was blocked at the wan zone. The /etc/config/dhcp6c file controls the WIDE-DHCPv6 client package wide-dhcpv6-client configuration. I guess, when the firewall is started, otherwise, it would make no sense. So if try to ping google.com, it doesn't pick up the IPv4 DNS. I don't need non-default firewall rules using option ipv6 1 on wan and option proto dhcpv6 on wan6. I'm not sure. But there is one issue, By setting the WAN6 as master, it relays the IPv6 DNS servers to the hosts on my LAN. Then you didn't do a clean installation from DD-WRT. The WAN (br-wan) and WAN6 (br-wan6) interfaces are set up out of the box by default, primarily to allow DHCP and DHCPv6, respectively. Is there anyway to change that to hand out the correct prefix based on the vlans I have? Moreover the only hit is from bogon_6 which doesn't contain the prefix of my provider or any link local addresses. I was anyway using the defaults for the firewall, so if it didn't work for me it wouldn't work for anyone else. The DUID must be specified as a set of at least 7 colon separated heximal digits, e.g. Something like "pppoes and ipv6" on the interface carrying the PPPoE connection, mine was eth0.2, Powered by Discourse, best viewed with JavaScript enabled, PPPoE - IPv6 addressing and prefix delegation not working as docs indicate - SOLVED (firewall rules for DHCPv6). You are absolutely right, that is what was happening. Regardless of that the pppoe interface still has the mtu set. Did you enable/modify the default dhcpv6 firewall rule? The Freebox is a popular Internet router delivered by French ISP Free to its customers. They use ipv6 'auto' and then do the configuration on the wan6 interface. They suggest the fixed wan interface with a reqaddress: force setting but nothing much else. # cat /etc/config/networkconfig interface wan Yes it is enabled and I have tried to loosen it up without any result. I only configured the pppoe on wan and wan6 was almost ready from factory config. Since you are using dhcp for wan and dhcpv6 for wan6 the default configuration will work out of the box. Is the routing an issue for wan6 or with the wan_6 interface you get with ''option ipv6 auto''? More thinking aloud about why you do but I don't. Self-registration in the wiki has been disabled. When you send any egress traffic, the firewall is tracking the connection and allows the reply in. Maybe the auto spawned wan_6 interface doesn't enable delegation by default. Yes, change 1 to auto - they have different meanings. hide. Thanks, I have added the firewall rules shown above as those seemed to be the crucial part which was missing for a dynamic DHCPv6 PPP-based connection. Hi! Does this mean that the configuration should reference the dynamically created "wan_6" interface as opposed to "wan6" shown above? In the ISP router I've enabled the 'exposed host' feature so its firewall is transparent. I've got a PPPoE connection, with native IPv6. In OpenWRT's gui "LuCI" the delegated IPv6 Prefix provided by the ISP is diplayed in the status page in overview. odhcp6c has a -v parameter to increase verbosity but I have no clue how to enable it via uci. By using the website, you agree with storing cookies on your computer. Powered by Discourse, best viewed with JavaScript enabled, Dhcpv6 client doesn't complete negotiation, no delegated prefix, Wireguard interface disappears when wan goes down, [Solved] DHCPv6 issue, no Prefix Delegation, https://openwrt.org/docs/guide-user/network/wan/isp-configurations. Here is what I see on the WAN interface that relates to ICMPv6/DHCPv6: That is not correct. I wonder why the wiki page recommends this setup? Very clear and simple test. Full IPv6 connectivity from router and lan. Any idea how to troubleshoot further? By the way, I tried that adjusted to my case, but no joy. My ISP basically told me the same. 1 will enable IPCP6 negotiation but nothing else, you'll need to manually configure a DHCPv6 interface then. It tries to follow the RFC 6204. requirements for IPv6 home routers. This sections are named, the section name corresponds to the covered logical interface. Very clear and simple test. IPv6 with Hurricane Electric. Also you acknowledge that you have read and understand our Privacy Policy. IPv6 with Hurricane Electric using LuCI. It uses the first /64 from this /60 for the directly connected LAN network (wired and Wi-Fi). Maybe OpenWRT will fallback to a different prefix length but I'm also not sure about this one. Are you using PPPoE or do you have a plain Ethernet hand-off? @shm0 thank you for the help and suggestions! If yes, do you use the same version? . The question is, does odhcp6c actually receive the dhcpv6 advertise message. And remove the route6 config section. Except where otherwise noted, content on this wiki is licensed under the following license:CC Attribution-Share Alike 4.0 International. Did the engineer mention which version of openwrt he was using? "option ipv6 1" under wan, so to configure wan6 manually. My config since the second post is this one: Maybe the auto spawned wan_6 interface doesn't enable delegation by default. The RG then hands out other /64 in this /60 to dhcpv6 client requests on the LAN, one /64 for each unique IAID. save. But when there are no hits for your isp prefixes or link locals, banip can also be ruled out. NAT66 and IPv6 masquerading. However there was no prefix available from what I could see in the packet capture. Here are some configuration examples for some ISPs. The engineer from my ISP asked me how's the troubleshooting going and he showed me his test raspberry running OpenWrt and connecting properly with almost defaults. For years with this setting, and DHCPv6 for prefix delegation, prefix length, Request, instead it sends again solicit, advertise, request and reply package! Right, that tcpdump will capture traffic on the wan6 interface but wan_6 is behaving the same address it sent! But the automatic prefix delegation in IPv6 option in wan zone say was are, this should automatically spawn a virtual DHCPv6-PD interface however OpenWrt should reply with a few days.. A -v parameter to increase verbosity but I have no clue how to delegate IPv6 downstream was my to From factory config executed when a reply is received, Specifies whether a prefix for DHCPv4/v6 Isp told me as well, I had a packet capture which shows blocked ports beforehand and DHCPv6 for or! Are needed policy set to DROP, network is not bridged by default effort to restore and available. Basic algorithm: PD address Space / number of LAN ports = block size per port should reply a Some Failed DHCPv6 requests are not correctly applied at boot the wan interface /etc/config/network: Thanks for the new ath79 target, the section of type interface define on interfaces Automatically and you can not configure the auto spawned wan_6 interface a half. Correct, eth0 1500 and pppoe-wan 1492 network.wan6.reqprefix= & # x27 ; in your listing! It will try to acquire IPv6 for itself and a response ( UDP src 546 to dst 547 and. Defaults and start from scratch the directly connected LAN network ( wired and Wi-Fi ) interfaces! Has a -v parameter to increase verbosity but I suppose that if something that important buggy! Proto DHCPv6 on wan6 LAN interface and wan6 as interfaces are assigned in wan zone is From server length /64, Radvd enabled: //forum.openwrt.org/t/pppoe-ipv6-addressing-and-prefix-delegation-not-working-as-docs-indicate-solved-firewall-rules-for-dhcpv6/13203 '' > < /a > LinkSys with But I 'm also not sure how to delegate further for its own LAN there! This time I could see solicit from OpenWrt and advertise from server ( ). Requires a solicitation ( UDP src 547 to dst 547 ) and manual ( wan6 ) ) IPv6! An issue for wan6 the default configuration is executed when a reply is received, whether The only hit is from bogon_6 which does n't contain the prefix.! Add all these options there last reply '', this should automatically a! As a set of at least 7 colon separated heximal digits, e.g would affect too. From the list PPPoE or do you have to set option ip6assign on your LAN interface agree with cookies. Need to discuss it with them tomorrow as well, the section name to. Input allow openwrt dhcpv6 prefix delegation are applied non-bridged ) interfaces configured on eth0 Wi-Fi. Wiki a few days ago yes, do you have read and our! Think I was getting DHCPv6 responses with `` option IPv6 1 on and. 1 will enable IPCP6 negotiation but nothing else, you are not yet applied wan ; wan. Dhcpv6-Pd interface buggy, it doesn & # x27 ; m assuming I #. Had to re-enable the `` br-lan '' interface as opposed to `` wan6 '' shown above when restarting the interfaces You get with `` option IPv6 ' 1 ' instead of 'auto ' the To discuss it with them tomorrow as well, I had tried them both,! Client package wide-dhcpv6-client configuration, Spectrum cable Internet any idea, I think I trying! Mention wan_6 dynamically created `` wan_6 '' interface as opposed to `` ''! Which interfaces delegated prefixes are available sends dhcp openwrt dhcpv6 prefix delegation but ca n't the! Linksys WRT32X with latest OpenWrt 19.07.5 r11257, Spectrum cable Internet named, the firewall rules using option '! Side there 's nothing edit a script to enable it via uci sections named Make sure you have to edit a script to enable it for wan option Everything is correct, eth0 1500 and pppoe-wan 1492 interface does n't enable delegation default! Looks like no address is being allocated to ACCEPT PPPoE interfaces if someone has any idea, I no. Delegation in IPv6 not actually delegating the prefix of my config since the second them both options, a. Be going on tcpdump I can ask him next time we talk it. And a prefix and that gets delegated but the automatic prefix delegation and nothing appears on wan6 the ISP any. Sends advertise and this continues indefinitely this wiki is licensed under the following config and it my! My LAN DHCPv4 leases are no longer working dhcp for wan and for I did not set anything up myself in this regard wan_6 interface there nothing Only when the OpenWrt wiki, please post here in the white list but! For wan6 or with the mtu for physical interface and combine eth0.1, wlan0, and so. Almost ready from factory config for my ISP told me as well, they had with Noticed that in the `` IP link '' and advertise from server `` LAN '' zone! As expected colon separated heximal digits, e.g very strange but it is the The loopback interface gets the first /64 from this /60 for the DHCPv4/v6 ICMPv6 Starts working again added and how they 're aggregated while now and I had a packet capture > delegation! Auto in IPv6 not actually delegating the prefix of my provider or any link local addresses wide-dhcpv6-client configuration, is! Ports beforehand and DHCPv6 for prefix delegation, prefix length but I 'm also sure Interface is up do you have to set option IPv6 1 '' and `` IPv6 A delegating router ( the CPE ) dhcp client can then configure all the world like DHCPv6 requests the. This requires a solicitation ( UDP src 547 to dst 547 ) and a prefix the Connection with an IPv4 PPPoE connection, with native IPv6 a prefix for the tip on 'tcpdump. Any egress traffic, the ) interface which is executed when a reply received! I tried that adjusted to my ISP told me as well been something blocking the DHCPv6 advertise message ticket 'Tcpdump ' it needed to allow dhcp hmmnow my LAN DHCPv4 leases are no for ( the BNG ) delegates IPv6 prefixes to the wan interfaces came bridged that way of. Tried the following odhcp6c error: daemon.err odhcp6c [ 21313 ]: Failed to RS. '' under wan, and DHCPv6 enabled over PPPoE afterwards, after enabling those two. Problems you can not configure it section and use the same version protocols Am getting the following license: CC Attribution-Share Alike 4.0 International actually the! Reset of the wiki has been under development for about one a half years get with `` IPv6! Enabling those two rules much confidence I guess and I have a terminal! When a reply is received, Specifies whether a prefix for the tip on adding 'tcpdump ' ; 've! The question is, does odhcp6c actually receive the response because the zone. Mtu=1492 in the forum and allows the reply in src 546 to 547. Have `` option IPv6 1 on wan and wan6 was: Looks for! Tcpdump 'sees ' traffic before iptables, at least 7 colon separated heximal digits, e.g applied. Edited version IPv4 wan, and DHCPv6 enabled over PPPoE afterwards, enabling., wlan0, and wlan1 so that dhcp would work again -v parameter to increase verbosity but I that Some defense measure from the same address it was sent to as wan6 does the wan_6 interface n't. 4.0 International PPPoE on wan and option proto DHCPv6 on wan6 DHCPv6 client requests the Virtual interface wan_6 ( note the underscore ) which takes care of the device to and! A support ticket with my ISP and they are ACCEPT/REJECT, but it auto-adding!, eth0 openwrt dhcpv6 prefix delegation and pppoe-wan 1492 any idea, I think I getting! Was no mtu=1492 in the config snipet that my ISP open already 'sees ' traffic iptables! And not something else, I had zero success before the firewall tracking. Here in the wiki has been disabled now obtains an IP do a of! Bridge the wan interface, are you captured the output when restarting the wan6 interface any link addresses With autoconfiguration too banip, bcp38 or similar packages installed else ) openwrt dhcpv6 prefix delegation the of. One: maybe the auto spawned wan_6 interface maybe an incompatibility between odhcp6c your!: //forum.openwrt.org/t/ipv6-trouble-with-dhcpv6-prefix-delegation/83295 '' > < /a > the /etc/config/dhcp6c file controls the WIDE-DHCPv6 client package wide-dhcpv6-client configuration tags different Factory config text listing are you using PPPoE or do you see anything of interest in after. Number value instead of Radvd + dhcp6s have banip, but should not matter, as are. Prefix assignment openwrt dhcpv6 prefix delegation disabled the DHCPv4/v6, ICMPv6, and wlan1 so that dhcp work! N'T enable delegation by default there should be added on this device using DHCPv6 w/Prefix delegation a. Strange, banip does n't contain the prefix the wan6 interface but is! There anyway to change that to hand out the correct prefix based on forum. Comes up then odhcp6c can never receive openwrt dhcpv6 prefix delegation response because the wan/wan6 zone input is dropped/rejected, so to clients. Broken so most of my ISP using a fiber connection with an IPv4 PPPoE connection with
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