IPv6 connectivity is dropping (but not IPv4)

  • Thread starter Thread starter TallGuyNYC
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TallGuyNYC

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I work with many open SSH sessions (at least six using tmux). After a few hours, the sessions to IPv6 addresses are dropping. The ones to IPv4 are not.


I am able to confirm that I have lost all IPv6 connectivity using the site Test your IPv6.


Using ipConfig, I see that the Lease is valid (the below was run at Wednesday, February 3, 2021 9:54:05 AM)


C:\ > ipconfig /all

Wireless LAN adapter Wi-Fi:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Intel(R) Dual Band Wireless-AC 8265
Physical Address. . . . . . . . . : 00-28-F8-58-18-E4
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IPv6 Address. . . . . . . . . . . : 2603:7000:<MASKED>(Preferred)
Temporary IPv6 Address. . . . . . : 2603:7000:<MASKED>(Preferred)
Link-local IPv6 Address . . . . . : fe80::6dbc:640f:a35:6ed9%12(Preferred)
IPv4 Address. . . . . . . . . . . : 192.168.0.180(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : Wednesday, February 3, 2021 7:57:54 AM
Lease Expires . . . . . . . . . . : Wednesday, February 3, 2021 11:07:04 AM
Default Gateway . . . . . . . . . : 192.168.0.1
DHCP Server . . . . . . . . . . . : 192.168.0.1
DHCPv6 IAID . . . . . . . . . . . : 167782648
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-26-E2-B8-54-54-EE-75-EE-F7-F2
DNS Servers . . . . . . . . . . . : 2001:4860:4860::8888
2001:4860:4860::8844
192.168.0.1
192.168.0.1
NetBIOS over Tcpip. . . . . . . . : Enabled


Note: I slightly changed the above by replacing much of the IPv6 address with the text <MASKED>

If I disconnect/reconnect (via windows "Internet Access") it regains IPv6 connectivity , but this is annoying and insufficient because I've lost my SSH sessions.

I can usually regain IPv6 connectivity with the below (I can't certify that this works 100% of the time), but this is also annoying and insufficient because I've lost my SSH sessions.


c:\utils\bin>ipconfig /renew6 W*


Windows IP Configuration


Wireless LAN adapter Wi-Fi:


Connection-specific DNS Suffix . :

IPv6 Address. . . . . . . . . . . : 2603:7000:<MASKED>

Temporary IPv6 Address. . . . . . : 2603:7000:<MASKED>

Link-local IPv6 Address . . . . . : fe80::6dbc:640f:a35:6ed9%12

IPv4 Address. . . . . . . . . . . : 192.168.0.180

Subnet Mask . . . . . . . . . . . : 255.255.255.0

Default Gateway . . . . . . . . . : fe80::e6c3:2aff:fec6:d38%12

192.168.0.1


c:\utils\bin>ipconfig /all


Windows IP Configuration



Host Name . . . . . . . . . . . . : Gerry-X1-Yoga

Primary Dns Suffix . . . . . . . :

Node Type . . . . . . . . . . . . : Hybrid

IP Routing Enabled. . . . . . . . : No

WINS Proxy Enabled. . . . . . . . : No


Wireless LAN adapter Wi-Fi:



Connection-specific DNS Suffix . :

Description . . . . . . . . . . . : Intel(R) Dual Band Wireless-AC 8265

Physical Address. . . . . . . . . : 00-28-F8-58-18-E4

DHCP Enabled. . . . . . . . . . . : Yes

Autoconfiguration Enabled . . . . : Yes

IPv6 Address. . . . . . . . . . . : 2603:7000:<MASKED>(Preferred)

Temporary IPv6 Address. . . . . . : 2603:7000:<MASKED>(Preferred)

Link-local IPv6 Address . . . . . : fe80::6dbc:640f:a35:6ed9%12(Preferred)

IPv4 Address. . . . . . . . . . . : 192.168.0.180(Preferred)

Subnet Mask . . . . . . . . . . . : 255.255.255.0

Lease Obtained. . . . . . . . . . : Wednesday, February 3, 2021 7:57:54 AM

Lease Expires . . . . . . . . . . : Wednesday, February 3, 2021 12:00:24 PM

Default Gateway . . . . . . . . . : fe80::e6c3:2aff:fec6:d38%12

192.168.0.1

DHCP Server . . . . . . . . . . . : 192.168.0.1

DHCPv6 IAID . . . . . . . . . . . : 167782648

DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-26-E2-B8-54-54-EE-75-EE-F7-F2

DNS Servers . . . . . . . . . . . : 2001:4860:4860::8888

2001:4860:4860::8844

192.168.0.1

192.168.0.1

NetBIOS over Tcpip. . . . . . . . : Enabled


Note that both cases, neither IPv4 NAT address or IPv6 address changes.


I also have a note to the WiFi Router vendor (TP-Link / Archer AX21 v1.20), but because it can be fixed by locally running 'ipconfig /renew6', it seems to be a problem on the Windows side and renewing the IPv6 address.

Any ideas on how to solve this?

Thanks!

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