Windows losing IPv6 address after ~10 minutes











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When I initially connect to my home network my windows PC is assigned an IPv6 address - however after a few minutes it loses this address! I seem to have similar behaviour on multiple hosts using both wireless and wired connections.



My router is an Asus RT-AC87U.



How could it be losing the IPv6 address? How can I mintor / diagnose this issue?



Update:
Based on @grawity's suggestion below I ran wireshark on this. Sure enough I see a Router Solicitation message and a Router Advertisment message with a Router lifetime of 600 seconds. After 600 seconds my computer drops its Ipv6 address.



What is supposed to happen? Should my host send another Router Solicitation message? Or should the router periodically resend the Router Advertisment message?



Update 2:





  • RFC 4862 says that Router Adverticement messages should be sent periodically.










share|improve this question




















  • 1




    Using Wireshark (capture filter icmp6 or display filter icmpv6), can you check how often you see a Router Advertisement, and whenever you see one what "ICMP→Router lifetime" & "ICMP→Prefix→Valid lifetime" does it show?
    – grawity
    Nov 19 at 11:23












  • Have you tried Asuswrt-Merlin?
    – Michael Hampton
    Nov 19 at 14:58










  • Go to test-ipv6.com. If it says that your ipv6 ICMP is filtered, then see this article. If this helps let me know and I'll put up a detailed answer.
    – harrymc
    Nov 19 at 21:24










  • @grawity - looks like you were right, the router advertisements are timing out. I've updated the question.
    – Matthew
    Nov 21 at 8:06










  • @harrymc: That only tells one whether ICMP from WAN is filtered; it doesn't necessarily correspond to multicast ICMP within the LAN itself...
    – grawity
    Nov 21 at 11:14















up vote
1
down vote

favorite












When I initially connect to my home network my windows PC is assigned an IPv6 address - however after a few minutes it loses this address! I seem to have similar behaviour on multiple hosts using both wireless and wired connections.



My router is an Asus RT-AC87U.



How could it be losing the IPv6 address? How can I mintor / diagnose this issue?



Update:
Based on @grawity's suggestion below I ran wireshark on this. Sure enough I see a Router Solicitation message and a Router Advertisment message with a Router lifetime of 600 seconds. After 600 seconds my computer drops its Ipv6 address.



What is supposed to happen? Should my host send another Router Solicitation message? Or should the router periodically resend the Router Advertisment message?



Update 2:





  • RFC 4862 says that Router Adverticement messages should be sent periodically.










share|improve this question




















  • 1




    Using Wireshark (capture filter icmp6 or display filter icmpv6), can you check how often you see a Router Advertisement, and whenever you see one what "ICMP→Router lifetime" & "ICMP→Prefix→Valid lifetime" does it show?
    – grawity
    Nov 19 at 11:23












  • Have you tried Asuswrt-Merlin?
    – Michael Hampton
    Nov 19 at 14:58










  • Go to test-ipv6.com. If it says that your ipv6 ICMP is filtered, then see this article. If this helps let me know and I'll put up a detailed answer.
    – harrymc
    Nov 19 at 21:24










  • @grawity - looks like you were right, the router advertisements are timing out. I've updated the question.
    – Matthew
    Nov 21 at 8:06










  • @harrymc: That only tells one whether ICMP from WAN is filtered; it doesn't necessarily correspond to multicast ICMP within the LAN itself...
    – grawity
    Nov 21 at 11:14













up vote
1
down vote

favorite









up vote
1
down vote

favorite











When I initially connect to my home network my windows PC is assigned an IPv6 address - however after a few minutes it loses this address! I seem to have similar behaviour on multiple hosts using both wireless and wired connections.



My router is an Asus RT-AC87U.



How could it be losing the IPv6 address? How can I mintor / diagnose this issue?



Update:
Based on @grawity's suggestion below I ran wireshark on this. Sure enough I see a Router Solicitation message and a Router Advertisment message with a Router lifetime of 600 seconds. After 600 seconds my computer drops its Ipv6 address.



What is supposed to happen? Should my host send another Router Solicitation message? Or should the router periodically resend the Router Advertisment message?



Update 2:





  • RFC 4862 says that Router Adverticement messages should be sent periodically.










share|improve this question















When I initially connect to my home network my windows PC is assigned an IPv6 address - however after a few minutes it loses this address! I seem to have similar behaviour on multiple hosts using both wireless and wired connections.



My router is an Asus RT-AC87U.



How could it be losing the IPv6 address? How can I mintor / diagnose this issue?



Update:
Based on @grawity's suggestion below I ran wireshark on this. Sure enough I see a Router Solicitation message and a Router Advertisment message with a Router lifetime of 600 seconds. After 600 seconds my computer drops its Ipv6 address.



What is supposed to happen? Should my host send another Router Solicitation message? Or should the router periodically resend the Router Advertisment message?



Update 2:





  • RFC 4862 says that Router Adverticement messages should be sent periodically.







windows-10 ipv6 asuswrt-merlin






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Nov 21 at 8:55

























asked Nov 19 at 10:49









Matthew

1164




1164








  • 1




    Using Wireshark (capture filter icmp6 or display filter icmpv6), can you check how often you see a Router Advertisement, and whenever you see one what "ICMP→Router lifetime" & "ICMP→Prefix→Valid lifetime" does it show?
    – grawity
    Nov 19 at 11:23












  • Have you tried Asuswrt-Merlin?
    – Michael Hampton
    Nov 19 at 14:58










  • Go to test-ipv6.com. If it says that your ipv6 ICMP is filtered, then see this article. If this helps let me know and I'll put up a detailed answer.
    – harrymc
    Nov 19 at 21:24










  • @grawity - looks like you were right, the router advertisements are timing out. I've updated the question.
    – Matthew
    Nov 21 at 8:06










  • @harrymc: That only tells one whether ICMP from WAN is filtered; it doesn't necessarily correspond to multicast ICMP within the LAN itself...
    – grawity
    Nov 21 at 11:14














  • 1




    Using Wireshark (capture filter icmp6 or display filter icmpv6), can you check how often you see a Router Advertisement, and whenever you see one what "ICMP→Router lifetime" & "ICMP→Prefix→Valid lifetime" does it show?
    – grawity
    Nov 19 at 11:23












  • Have you tried Asuswrt-Merlin?
    – Michael Hampton
    Nov 19 at 14:58










  • Go to test-ipv6.com. If it says that your ipv6 ICMP is filtered, then see this article. If this helps let me know and I'll put up a detailed answer.
    – harrymc
    Nov 19 at 21:24










  • @grawity - looks like you were right, the router advertisements are timing out. I've updated the question.
    – Matthew
    Nov 21 at 8:06










  • @harrymc: That only tells one whether ICMP from WAN is filtered; it doesn't necessarily correspond to multicast ICMP within the LAN itself...
    – grawity
    Nov 21 at 11:14








1




1




Using Wireshark (capture filter icmp6 or display filter icmpv6), can you check how often you see a Router Advertisement, and whenever you see one what "ICMP→Router lifetime" & "ICMP→Prefix→Valid lifetime" does it show?
– grawity
Nov 19 at 11:23






Using Wireshark (capture filter icmp6 or display filter icmpv6), can you check how often you see a Router Advertisement, and whenever you see one what "ICMP→Router lifetime" & "ICMP→Prefix→Valid lifetime" does it show?
– grawity
Nov 19 at 11:23














Have you tried Asuswrt-Merlin?
– Michael Hampton
Nov 19 at 14:58




Have you tried Asuswrt-Merlin?
– Michael Hampton
Nov 19 at 14:58












Go to test-ipv6.com. If it says that your ipv6 ICMP is filtered, then see this article. If this helps let me know and I'll put up a detailed answer.
– harrymc
Nov 19 at 21:24




Go to test-ipv6.com. If it says that your ipv6 ICMP is filtered, then see this article. If this helps let me know and I'll put up a detailed answer.
– harrymc
Nov 19 at 21:24












@grawity - looks like you were right, the router advertisements are timing out. I've updated the question.
– Matthew
Nov 21 at 8:06




@grawity - looks like you were right, the router advertisements are timing out. I've updated the question.
– Matthew
Nov 21 at 8:06












@harrymc: That only tells one whether ICMP from WAN is filtered; it doesn't necessarily correspond to multicast ICMP within the LAN itself...
– grawity
Nov 21 at 11:14




@harrymc: That only tells one whether ICMP from WAN is filtered; it doesn't necessarily correspond to multicast ICMP within the LAN itself...
– grawity
Nov 21 at 11:14










1 Answer
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up vote
1
down vote













Ok I think I figured this out:



My router has a flag that says Enable Router Advertisement. This was enabled - but by switching it to disabled (restarting) and then back to enabled (and restarting again) seems to have done something to the router and now wireshark shows it sending Router Advertisement messages every few seconds!






share|improve this answer

















  • 1




    Every few seconds is way too often. (Drains Wi-Fi devices' battery, among other things.) Normally it should be every few minutes, with the "Router Lifetime" field being 2x-3x the interval. If you saw that "Router Lifetime" is 600s, expect the advertisements to be automatically sent every 200-300s (plus whenever a PC requests/solicits one).
    – grawity
    Nov 21 at 11:17













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up vote
1
down vote













Ok I think I figured this out:



My router has a flag that says Enable Router Advertisement. This was enabled - but by switching it to disabled (restarting) and then back to enabled (and restarting again) seems to have done something to the router and now wireshark shows it sending Router Advertisement messages every few seconds!






share|improve this answer

















  • 1




    Every few seconds is way too often. (Drains Wi-Fi devices' battery, among other things.) Normally it should be every few minutes, with the "Router Lifetime" field being 2x-3x the interval. If you saw that "Router Lifetime" is 600s, expect the advertisements to be automatically sent every 200-300s (plus whenever a PC requests/solicits one).
    – grawity
    Nov 21 at 11:17

















up vote
1
down vote













Ok I think I figured this out:



My router has a flag that says Enable Router Advertisement. This was enabled - but by switching it to disabled (restarting) and then back to enabled (and restarting again) seems to have done something to the router and now wireshark shows it sending Router Advertisement messages every few seconds!






share|improve this answer

















  • 1




    Every few seconds is way too often. (Drains Wi-Fi devices' battery, among other things.) Normally it should be every few minutes, with the "Router Lifetime" field being 2x-3x the interval. If you saw that "Router Lifetime" is 600s, expect the advertisements to be automatically sent every 200-300s (plus whenever a PC requests/solicits one).
    – grawity
    Nov 21 at 11:17















up vote
1
down vote










up vote
1
down vote









Ok I think I figured this out:



My router has a flag that says Enable Router Advertisement. This was enabled - but by switching it to disabled (restarting) and then back to enabled (and restarting again) seems to have done something to the router and now wireshark shows it sending Router Advertisement messages every few seconds!






share|improve this answer












Ok I think I figured this out:



My router has a flag that says Enable Router Advertisement. This was enabled - but by switching it to disabled (restarting) and then back to enabled (and restarting again) seems to have done something to the router and now wireshark shows it sending Router Advertisement messages every few seconds!







share|improve this answer












share|improve this answer



share|improve this answer










answered Nov 21 at 8:55









Matthew

1164




1164








  • 1




    Every few seconds is way too often. (Drains Wi-Fi devices' battery, among other things.) Normally it should be every few minutes, with the "Router Lifetime" field being 2x-3x the interval. If you saw that "Router Lifetime" is 600s, expect the advertisements to be automatically sent every 200-300s (plus whenever a PC requests/solicits one).
    – grawity
    Nov 21 at 11:17
















  • 1




    Every few seconds is way too often. (Drains Wi-Fi devices' battery, among other things.) Normally it should be every few minutes, with the "Router Lifetime" field being 2x-3x the interval. If you saw that "Router Lifetime" is 600s, expect the advertisements to be automatically sent every 200-300s (plus whenever a PC requests/solicits one).
    – grawity
    Nov 21 at 11:17










1




1




Every few seconds is way too often. (Drains Wi-Fi devices' battery, among other things.) Normally it should be every few minutes, with the "Router Lifetime" field being 2x-3x the interval. If you saw that "Router Lifetime" is 600s, expect the advertisements to be automatically sent every 200-300s (plus whenever a PC requests/solicits one).
– grawity
Nov 21 at 11:17






Every few seconds is way too often. (Drains Wi-Fi devices' battery, among other things.) Normally it should be every few minutes, with the "Router Lifetime" field being 2x-3x the interval. If you saw that "Router Lifetime" is 600s, expect the advertisements to be automatically sent every 200-300s (plus whenever a PC requests/solicits one).
– grawity
Nov 21 at 11:17




















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