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Archer C6 (and other models) doesn't work in stateful IPv6 network

Archer C6 (and other models) doesn't work in stateful IPv6 network

Archer C6 (and other models) doesn't work in stateful IPv6 network
Archer C6 (and other models) doesn't work in stateful IPv6 network
Yesterday - last edited 2 hours ago
Tags: #Network Connectivity #IPv6
Model: Archer C6  
Hardware Version: V4
Firmware Version: 1.15.0 Build 250729 Rel.63726n(4555)

In a typical broadband network using DHCP/DHCPv6 the Archer C6 fails to accept a IPv6 address from the network. IPv4 works fine.

 

We are the network admins and bought this router to have in our lab as one example of a home router. We have different ones (Asus/D-Link/...) that work fine in the exact same environment.

 

Archer C6 4.0

1.15.0 Build 250729 Rel.63726n(4555)

 

System log showing the error in TP-Link

 

1 INFO 0days, 00:00:08, [tmpd]register tmp app, type: 1
2 INFO 0days, 00:00:08, [portal]portal init
3 INFO 0days, 00:00:08, [lan]LAN: Set interface br-lan0 ip=192.168.60.1 netmask 255.255.255.0.
4 INFO 0days, 00:00:08, [tmpd]register tmp app, type: 2
5 INFO 0days, 00:00:09, [tmpd]register tmp app, type: 4
6 INFO 0days, 00:00:27, [DSLite]Dslite disable
7 INFO 0days, 00:00:27, [portal]portal not enabled
8 INFO 0days, 00:00:27, [portal]portal stop
9 ERROR 0days, 00:00:27, [l2tpd]Unable to load config file
10 INFO 0days, 00:00:27, [httpd]Http server start!
11 INFO 0days, 00:00:30, [wan]Wan ethernet port plug on.
12 INFO 0days, 00:00:30, [dhcp6c]Start dhcp6c.
13 INFO 0days, 00:00:31, [dhcpc]Send DISCOVER with unicast flag 0
14 INFO 0days, 00:00:31, [dhcp6c]create SOLICIT message to find server.
15 INFO 0days, 00:00:31, [dhcp6c]no RA received yet.
16 INFO 0days, 00:00:31, [dhcp6c]received DHCPv6 message, type: 2
17 INFO 0days, 00:00:31, [dhcp6c]unexpected DHCPv6 message, type: 2
18 INFO 0days, 00:00:31, [dhcp6c]received DHCPv6 message, type: 2
19 INFO 0days, 00:00:31, [dhcp6c]unexpected DHCPv6 message, type: 2
20 INFO 0days, 00:00:32, [dhcp6c]no RA received yet.
21 INFO 0days, 00:00:32, [dhcp6c]received DHCPv6 message, type: 2
22 INFO 0days, 00:00:32, [dhcp6c]unexpected DHCPv6 message, type: 2
23 INFO 0days, 00:00:32, [dhcp6c]received DHCPv6 message, type: 2
24 INFO 0days, 00:00:32, [dhcp6c]unexpected DHCPv6 message, type: 2
25 INFO 0days, 00:00:33, [dhcpc]Send DISCOVER with unicast flag 0
26 INFO 0days, 00:00:33, [dhcpc]Recv OFFER from server 83.233.57.226 with ip 100.77.249.64
27 INFO 0days, 00:00:33, [dhcpc]Send REQUEST to server 83.233.57.226 with request ip 100.77.249.64
28 INFO 0days, 00:00:33, [dhcpc]eth0 set ip 100.77.249.64 mask 255.255.192.0 gateway 100.77.192.1
29 INFO 0days, 00:00:33, [wan]advanced ddns -wanChanged
30 INFO 0days, 00:00:33, [wan]systool sntpc -sntpRequest
31 INFO 0days, 00:00:33, [dnsproxy]Register Dns Detect
32 INFO 0days, 00:00:33, [dnsproxy]Register primary = 0x47a9d152, secondary = 0x48a9d152
33 ERROR 0days, 00:00:33, [inetd]INETD: select error, abort.
34 WARNING 0days, 00:00:33, [cwmp]cwmp is not start
35 ERROR 0days, 00:00:33, [l2tpd]Unable to load config file
36 WARNING 0days, 00:00:33, [cwmp]cwmp is not start
37 INFO 0days, 00:00:34, [dhcp6c]no RA received yet.
38 INFO 0days, 00:00:34, [dhcp6c]received DHCPv6 message, type: 2
39 INFO 0days, 00:00:34, [dhcp6c]unexpected DHCPv6 message, type: 2
40 INFO 0days, 00:00:34, [dhcp6c]received DHCPv6 message, type: 2
41 INFO 0days, 00:00:34, [dhcp6c]unexpected DHCPv6 message, type: 2
42 INFO 0days, 00:00:38, [dhcp6c]no RA received yet.
43 INFO 0days, 00:00:38, [dhcp6c]received DHCPv6 message, type: 2
44 INFO 0days, 00:00:38, [dhcp6c]unexpected DHCPv6 message, type: 2
45 INFO 0days, 00:00:38, [dhcp6c]received DHCPv6 message, type: 2
46 INFO 0days, 00:00:38, [dhcp6c]unexpected DHCPv6 message, type: 2
47 INFO 0days, 00:00:46, [dhcp6c]no RA received yet.
48 INFO 0days, 00:00:46, [dhcp6c]received DHCPv6 message, type: 2
49 INFO 0days, 00:00:46, [dhcp6c]unexpected DHCPv6 message, type: 2
50 INFO 0days, 00:00:46, [dhcp6c]received DHCPv6 message, type: 2
51 INFO 0days, 00:00:46, [dhcp6c]unexpected DHCPv6 message, type: 2
52 INFO 0days, 00:01:02, [dhcp6c]no RA received yet.
53 INFO 0days, 00:01:02, [dhcp6c]received DHCPv6 message, type: 2
54 INFO 0days, 00:01:02, [dhcp6c]unexpected DHCPv6 message, type: 2
55 INFO 0days, 00:01:02, [dhcp6c]received DHCPv6 message, type: 2
56 INFO 0days, 00:01:02, [dhcp6c]unexpected DHCPv6 message, type: 2
57 INFO 0days, 00:01:34, [dhcp6c]no RA received yet.
58 INFO 0days, 00:01:34, [dhcp6c]received DHCPv6 message, type: 2
59 INFO 0days, 00:01:34, [dhcp6c]unexpected DHCPv6 message, type: 2
60 INFO 0days, 00:01:34, [dhcp6c]received DHCPv6 message, type: 2
61 INFO 0days, 00:01:34, [dhcp6c]unexpected DHCPv6 message, type: 2
62 INFO 0days, 00:02:38, [dhcp6c]no RA received yet.
63 INFO 0days, 00:02:38, [dhcp6c]received DHCPv6 message, type: 2
64 INFO 0days, 00:02:38, [dhcp6c]unexpected DHCPv6 message, type: 2
65 INFO 0days, 00:02:38, [dhcp6c]received DHCPv6 message, type: 2
66 INFO 0days, 00:02:38, [dhcp6c]unexpected DHCPv6 message, type: 2
67 ERROR 0days, 00:02:57, [rtadvd]send RA failed: 55
68 ERROR 0days, 00:03:01, [rtadvd]send RA failed: 55
69 ERROR 0days, 00:03:01, [rtadvd]send RA failed: 55
70 ERROR 0days, 00:03:06, [rtadvd]send RA failed: 55
71 ERROR 0days, 00:03:06, [rtadvd]send RA failed: 55
72 ERROR 0days, 00:03:10, [rtadvd]send RA failed: 55
73 ERROR 0days, 00:03:16, [rtadvd]send RA failed: 55
74 ERROR 0days, 00:03:25, [rtadvd]send RA failed: 55
75 ERROR 0days, 00:03:30, [rtadvd]send RA failed: 55
76 ERROR 0days, 00:03:38, [rtadvd]send RA failed: 55
77 ERROR 0days, 00:03:47, [rtadvd]send RA failed: 55
78 ERROR 0days, 00:03:56, [rtadvd]send RA failed: 55
79 ERROR 0days, 00:04:03, [rtadvd]send RA failed: 55
80 ERROR 0days, 00:04:09, [rtadvd]send RA failed: 55
81 ERROR 0days, 00:04:15, [rtadvd]send RA failed: 55
82 ERROR 0days, 00:04:22, [rtadvd]send RA failed: 55
83 ERROR 0days, 00:04:27, [rtadvd]send RA failed: 55
84 ERROR 0days, 00:04:35, [rtadvd]send RA failed: 55
85 INFO 0days, 00:04:38, [dhcp6c]no RA received yet.
86 INFO 0days, 00:04:38, [dhcp6c]received DHCPv6 message, type: 2
87 INFO 0days, 00:04:38, [dhcp6c]unexpected DHCPv6 message, type: 2
88 INFO 0days, 00:04:38, [dhcp6c]received DHCPv6 message, type: 2
89 INFO 0days, 00:04:38, [dhcp6c]unexpected DHCPv6 message, type: 2
90 ERROR 0days, 00:04:41, [rtadvd]send RA failed: 55
91 ERROR 0days, 00:04:50, [rtadvd]send RA failed: 55
92 ERROR 0days, 00:04:56, [rtadvd]send RA failed: 55
93 ERROR 0days, 00:05:06, [rtadvd]send RA failed: 55
94 ERROR 0days, 00:05:12, [rtadvd]send RA failed: 55
95 ERROR 0days, 00:05:17, [rtadvd]send RA failed: 55
96 ERROR 0days, 00:05:25, [rtadvd]send RA failed: 55
97 ERROR 0days, 00:05:32, [rtadvd]send RA failed: 55
98 ERROR 0days, 00:05:41, [rtadvd]send RA failed: 55
99 ERROR 0days, 00:05:47, [rtadvd]send RA failed: 55
100 ERROR 0days, 00:05:57, [rtadvd]send RA failed: 55
101 ERROR 0days, 00:06:04, [rtadvd]send RA failed: 55
102 ERROR 0days, 00:06:14, [rtadvd]send RA failed: 55
103 ERROR 0days, 00:06:21, [rtadvd]send RA failed: 55
104 ERROR 0days, 00:06:31, [rtadvd]send RA failed: 55
105 INFO 0days, 00:06:34, [wan]Wan ethernet port plug off.
106 INFO 0days, 00:06:35, [dhcpc]interface bring down
107 INFO 0days, 00:06:35, [wan]advanced ddns -wanChanged
108 ERROR 0days, 00:06:38, [rtadvd]send RA failed: 55
109 INFO 0days, 00:06:45, [wan]Wan ethernet port plug on.
110 INFO 0days, 00:06:45, [dhcp6c]Start dhcp6c.
111 INFO 0days, 00:06:46, [dhcpc]Send DISCOVER with unicast flag 0
112 INFO 0days, 00:06:46, [dhcp6c]create SOLICIT message to find server.
113 INFO 0days, 00:06:46, [dhcp6c]no RA received yet.
114 ERROR 0days, 00:06:47, [rtadvd]send RA failed: 55
115 INFO 0days, 00:06:47, [dhcp6c]no RA received yet.
116 INFO 0days, 00:06:47, [dhcp6c]received DHCPv6 message, type: 2
117 INFO 0days, 00:06:47, [dhcp6c]unexpected DHCPv6 message, type: 2
118 INFO 0days, 00:06:47, [dhcp6c]received DHCPv6 message, type: 2
119 INFO 0days, 00:06:47, [dhcp6c]unexpected DHCPv6 message, type: 2
120 INFO 0days, 00:06:48, [dhcpc]Send DISCOVER with unicast flag 0
121 INFO 0days, 00:06:48, [dhcpc]Recv OFFER from server 83.233.57.226 with ip 100.77.249.64
122 INFO 0days, 00:06:48, [dhcpc]Send REQUEST to server 83.233.57.226 with request ip 100.77.249.64
123 INFO 0days, 00:06:49, [dhcpc]eth0 set ip 100.77.249.64 mask 255.255.192.0 gateway 100.77.192.1
124 INFO 0days, 00:06:49, [wan]advanced ddns -wanChanged
125 INFO 0days, 00:06:49, [wan]systool sntpc -sntpRequest
126 INFO 0days, 00:06:49, [dnsproxy]Register Dns Detect
127 INFO 0days, 00:06:49, [dnsproxy]Register primary = 0x47a9d152, secondary = 0x48a9d152
128 ERROR 0days, 00:06:49, [inetd]INETD: select error, abort.
129 WARNING 0days, 00:06:49, [cwmp]cwmp is not start
130 ERROR 0days, 00:06:49, [l2tpd]Unable to load config file
131 WARNING 0days, 00:06:49, [cwmp]cwmp is not start
132 INFO 0days, 00:06:49, [dhcp6c]no RA received yet.
133 INFO 0days, 00:06:49, [dhcp6c]received DHCPv6 message, type: 2
134 INFO 0days, 00:06:49, [dhcp6c]unexpected DHCPv6 message, type: 2
135 INFO 0days, 00:06:49, [dhcp6c]received DHCPv6 message, type: 2
136 INFO 0days, 00:06:49, [dhcp6c]unexpected DHCPv6 message, type: 2
137 INFO 0days, 00:06:53, [dhcp6c]no RA received yet.
138 INFO 0days, 00:06:53, [dhcp6c]received DHCPv6 message, type: 2
139 INFO 0days, 00:06:53, [dhcp6c]unexpected DHCPv6 message, type: 2
140 INFO 0days, 00:06:53, [dhcp6c]received DHCPv6 message, type: 2
141 INFO 0days, 00:06:53, [dhcp6c]unexpected DHCPv6 message, type: 2
142 ERROR 0days, 00:06:57, [rtadvd]send RA failed: 55
143 INFO 0days, 00:07:01, [dhcp6c]no RA received yet.
144 INFO 0days, 00:07:01, [dhcp6c]received DHCPv6 message, type: 2
145 INFO 0days, 00:07:01, [dhcp6c]unexpected DHCPv6 message, type: 2
146 INFO 0days, 00:07:01, [dhcp6c]received DHCPv6 message, type: 2
147 INFO 0days, 00:07:01, [dhcp6c]unexpected DHCPv6 message, type: 2
148 ERROR 0days, 00:07:04, [rtadvd]send RA failed: 55
149 ERROR 0days, 00:07:12, [rtadvd]send RA failed: 55
150 INFO 0days, 00:07:17, [dhcp6c]no RA received yet.
151 INFO 0days, 00:07:17, [dhcp6c]received DHCPv6 message, type: 2
152 INFO 0days, 00:07:17, [dhcp6c]unexpected DHCPv6 message, type: 2
153 INFO 0days, 00:07:17, [dhcp6c]received DHCPv6 message, type: 2
154 INFO 0days, 00:07:17, [dhcp6c]unexpected DHCPv6 message, type: 2
155 ERROR 0days, 00:07:22, [rtadvd]send RA failed: 55
156 ERROR 0days, 00:07:32, [rtadvd]send RA failed: 55
157 ERROR 0days, 00:07:38, [rtadvd]send RA failed: 55
158 ERROR 0days, 00:07:48, [rtadvd]send RA failed: 55

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#1
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4 Reply
Re:Archer C6 (and other models) doesn't work in stateful IPv6 network
Yesterday

Here is also some log from the Broadband Network Gateway:
 

153 2025/09/25 09:40:54.045 CEST MINOR: DEBUG #2001 vprn999 TIP
"TIP: DHCP6_PKT
   Incoming DHCP6 Msg : SOLICIT (1)
   on itf pw-1922 (pw-1922:2103.1101)
     Trans Id : 0x7ff153
     Option : CLIENTID (1), Length : 10
       LL  : HwTyp=0001,LL=98ba5f85635b
       0003000198ba5f85635b
     Option : ELAPSED_TIME (8), Length : 2
       Time : 127000 ms
     Option : ORO (6), Length : 2
       Requested Option : DNS_NAME_SRVR (23)
     Option : IA_NA (3), Length : 12
       IAID : 956301313
       Time1: 0 seconds
       Time2: 0 seconds
"

154 2025/09/25 09:40:54.048 CEST MINOR: DEBUG #2001 vprn1001 TIP
"TIP: DHCP6_PKT
   Incoming DHCP6 Msg : SOLICIT (1)
   on itf customer (pw-1922:2103.1101)
     Trans Id : 0x7ff153
     Option : CLIENTID (1), Length : 10
       LL  : HwTyp=0001,LL=98ba5f85635b
       0003000198ba5f85635b
     Option : ELAPSED_TIME (8), Length : 2
       Time : 127000 ms
     Option : ORO (6), Length : 2
       Requested Option : DNS_NAME_SRVR (23)
     Option : IA_NA (3), Length : 12
       IAID : 956301313
       Time1: 0 seconds
       Time2: 0 seconds
"

155 2025/09/25 09:40:54.048 CEST MINOR: DEBUG #2001 vprn1001 TIP
"TIP: DHCP6_PKT
   Outgoing DHCP6 Msg : RELAY_FORW (12)
   to itf
     Hop Count : 0
     Link Addr : 2a00:1598:c055::1
     Peer Addr : fe80::9aba:5fff:fe85:635b
     Option : RELAY_MSG (9), Length : 46
       Msg Type : SOLICIT (1)
       Trans Id : 0x7ff153
       Option : CLIENTID (1), Length : 10
         LL  : HwTyp=0001,LL=98ba5f85635b
         0003000198ba5f85635b
       Option : ELAPSED_TIME (8), Length : 2
         Time : 127000 ms
       Option : ORO (6), Length : 2
         Requested Option : DNS_NAME_SRVR (23)
       Option : IA_NA (3), Length : 12
         IAID : 956301313
         Time1: 0 seconds
         Time2: 0 seconds
     Option : INTERFACE_ID (18), Length : 17
       Interface Id : 70772d313932323a323130332e31313031 (pw-1922:2103.1101)
     Option : VENDOR_OPTS (17), Length : 14
       Enterprise : 0000197f
       Option : PFX_LEN (3), Length : 1
         56
       Option : RESERVED_NA_LEN (4), Length : 1
         128
"

156 2025/09/25 09:40:54.048 CEST MINOR: DEBUG #2001 vprn1001 TIP
"TIP: DHCP6_PKT
   Outgoing DHCP6 Msg : RELAY_FORW (12)
   to itf
     Hop Count : 0
     Link Addr : 2a00:1598:c055::1
     Peer Addr : fe80::9aba:5fff:fe85:635b
     Option : RELAY_MSG (9), Length : 46
       Msg Type : SOLICIT (1)
       Trans Id : 0x7ff153
       Option : CLIENTID (1), Length : 10
         LL  : HwTyp=0001,LL=98ba5f85635b
         0003000198ba5f85635b
       Option : ELAPSED_TIME (8), Length : 2
         Time : 127000 ms
       Option : ORO (6), Length : 2
         Requested Option : DNS_NAME_SRVR (23)
       Option : IA_NA (3), Length : 12
         IAID : 956301313
         Time1: 0 seconds
         Time2: 0 seconds
     Option : INTERFACE_ID (18), Length : 17
       Interface Id : 70772d313932323a323130332e31313031 (pw-1922:2103.1101)
     Option : VENDOR_OPTS (17), Length : 14
       Enterprise : 0000197f
       Option : PFX_LEN (3), Length : 1
         56
       Option : RESERVED_NA_LEN (4), Length : 1
         128
"

157 2025/09/25 09:40:54.049 CEST MINOR: DEBUG #2001 vprn1001 TIP
"TIP: DHCP6_PKT
   Incoming DHCP6 Msg : RELAY_REPLY (13)
   on itf dhcp6_loop (system)
     Hop Count : 0
     Link Addr : 2a00:1598:c055::1
     Peer Addr : fe80::9aba:5fff:fe85:635b
     Option : INTERFACE_ID (18), Length : 17
       Interface Id : 70772d313932323a323130332e31313031 (pw-1922:2103.1101)
     Option : RELAY_MSG (9), Length : 116
       Msg Type : ADVERTISE (2)
       Trans Id : 0x7ff153
       Option : CLIENTID (1), Length : 10
         LL  : HwTyp=0001,LL=98ba5f85635b
         0003000198ba5f85635b
       Option : SERVERID (2), Length : 14
         LLT : HwTyp=0001,T=655309556,LL=00505686c9a1
         00010001270f3af400505686c9a1
       Option : IA_NA (3), Length : 40
         IAID : 956301313
         Time1: 5400 seconds
         Time2: 10800 seconds
         Option : IAADDR (5), Length : 24
           Address : 2a00:1598:c055:1::3:1da7
           Preferred Lifetime : 21600 seconds
           Valid Lifetime     : 21600 seconds
       Option : DNS_NAME_SRVR (23), Length : 32
         Server : 2a00:1598:53:1::2
         Server : 2a00:1598:53:4::2
"

158 2025/09/25 09:40:54.050 CEST MINOR: DEBUG #2001 vprn999 TIP
"TIP: DHCP6_PKT
   Outgoing DHCP6 Msg : ADVERTISE (2)
   to itf pw-1922 (pw-1922:2103.1101)
     Trans Id : 0x7ff153
     Option : CLIENTID (1), Length : 10
       LL  : HwTyp=0001,LL=98ba5f85635b
       0003000198ba5f85635b
     Option : SERVERID (2), Length : 14
       LLT : HwTyp=0001,T=655309556,LL=00505686c9a1
       00010001270f3af400505686c9a1
     Option : IA_NA (3), Length : 40
       IAID : 956301313
       Time1: 5400 seconds
       Time2: 10800 seconds
       Option : IAADDR (5), Length : 24
         Address : 2a00:1598:c055:1::3:1da7
         Preferred Lifetime : 21600 seconds
         Valid Lifetime     : 21600 seconds
     Option : DNS_NAME_SRVR (23), Length : 32
       Server : 2a00:1598:53:1::2
       Server : 2a00:1598:53:4::2
"

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#2
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Re:Archer C6 (and other models) doesn't work in stateful IPv6 network
3 hours ago

Hello @ThomasN3531 ,

Welcome to our community.

 

May I know if your network topology diagram is as follows:

ISP modem—router)))((( client devices

(Note: — stands for wired connection,)))((( stands for wireless connection )

Please confirm that you are familiar with your IPv6 internet connection type and configuration details.
This FAQ will help you with configuring an IPv6 Internet connection: How to set up an IPv6 Internet connection.
However, there are a few exceptional cases where ISP only provides prefix-delegation, please refer to How to set up IPv6 service for some specific ISP for more details.

 

If the suggestions above don't help, please take screenshots of your IPv6 settings and send them to us here.

 

 

Check Out the Latest Posts: △ Pre-release Firmware for Archer AX50 Introduces New Parental Control Features and Enhancements △ Pre-release Firmware for Archer AX80 Supports EasyMesh in AP Mode, DoH/DoT, ECO Mode, and More △Introducing AI QoS: Elevate Your Gaming Experience on the Archer GE800 Gaming Router △Connect TP-Link Archer BE550 to Germany's DS-Lite (Dual Stack Lite) Internet via WAN △ Tether KidShield Test Recruitment - Safeguarding Children's Online Experience
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#3
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Re:Archer C6 (and other models) doesn't work in stateful IPv6 network
3 hours ago - last edited 2 hours ago

  @Joseph-TP Diagram as follows

 

Client Devices -- TP-Link Router -- Network switch -- Network Aggregate -- BNG

 

If I replace TP-Link Router with Asus Router/D-Link it works fine and the router gets a /128 as IA_NA and a /56 for IA_PD.

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#4
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Re:Archer C6 (and other models) doesn't work in stateful IPv6 network
an hour ago

Hello @ThomasN3531 ,

We would like to escalate your case to the support engineers, and they will follow up on it. If you are willing to conduct further analysis, please check your inbox and respond.    

Check Out the Latest Posts: △ Pre-release Firmware for Archer AX50 Introduces New Parental Control Features and Enhancements △ Pre-release Firmware for Archer AX80 Supports EasyMesh in AP Mode, DoH/DoT, ECO Mode, and More △Introducing AI QoS: Elevate Your Gaming Experience on the Archer GE800 Gaming Router △Connect TP-Link Archer BE550 to Germany's DS-Lite (Dual Stack Lite) Internet via WAN △ Tether KidShield Test Recruitment - Safeguarding Children's Online Experience
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#5
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Views: 88

Replies: 4

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