IPv6 Problem - some containers can reach some can't

aeminkocal

Member
Mar 26, 2020
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My ISP has provided me a /48 IPv6 subnet.
I needed to configure the main server as 2a02:e0:4f00:8a::1 gateway and 2a02:e0:4f00:8a::2/64 wan ip address.
Then I added route to the interface with this command "ip -6 route add 2A02:E0:3130::/48 dev vmbr2"
I am able to connect the network on some containers/vms, and on some of them I can't.

Routing table of one of the containers I CAN connect the network:
localhost/128 [::] U 256 2 0 lo
2a02:e0:3130:2afa::/64 [::] U 256 2 0 eth0
2a02:e0:4f00:8a::2/128 [::] U 1024 1 0 eth0
fe80::/64 [::] U 256 1 0 eth0
[::]/0 2a02:e0:4f00:8a::2 UG 1024 18 0 eth0
localhost/128 [::] Un 0 31 0 lo
2a02:e0:3130:2afa::1/128 [::] Un 0 13 0 eth0
fe80::4ce2:a5ff:fe85:82de/128 [::] Un 0 50 0 eth0
ff00::/8 [::] U 256 50 0 eth0
[::]/0 [::] !n -1 1 0 lo

I can also ping 2a02:e0:4f00:8a::2 (WAN) from this container.

Routing table of one of the containers I CAN'T connect the network:
localhost/128 [::] U 256 2 0 lo
2a02:e0:3130:f3::/64 [::] U 256 2 0 eth0
2a02:e0:4f00:8a::2/128 [::] U 1024 2 0 eth0
fe80::/64 [::] U 256 1 0 eth0
[::]/0 2a02:e0:4f00:8a::2 UG 1024 3 0 eth0
localhost/128 [::] Un 0 6 0 lo
2A02:E0:3130:f3::3/128 [::] Un 0 4 0 eth0
fe80::b005:2bff:fe19:1c2/128 [::] Un 0 14 0 eth0
ff00::/8 [::] U 256 48 0 eth0
[::]/0 [::] !n -1 1 0 lo

I can't ping 2a02:e0:4f00:8a::2 (WAN) from this container.

This is my proxmox network config:
1646364877681.png


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AS I WAS WRITING THIS POST I LOST CONNECTION ON THE CONTAINER IN WHICH I WAS ABLE TO CONNECT THE NETWORK. BUT STILL I CAN CONNECT THE NETWORK ON ONE OF MY WINDOWS MACHINES. IT IS SO UNSTABLE. HERE IS THE TRACEROUTE TO GOOGLE FROM THAT MACHINE.

C:\Users\Admin>tracert -6 google.com

Tracing route to google.com [2a00:1450:400e:803::200e]
over a maximum of 30 hops:

1 <1 ms <1 ms <1 ms 2a02:e0:4f00:8a::2
2 8 ms 2 ms 2 ms 2a02:e0:4f00:8a::1
3 11 ms 8 ms 8 ms ::ffff:10.40.171.214
4 * * * Request timed out.
5 10 ms 8 ms 8 ms fc00:0:0:2003::1
6 26 ms 26 ms 27 ms 2001:4860:1:1::bbc
.....