I'm unsure as to why this is happening... anyway, let me start from the beginning
The Setup
1 * Dedicated server with a /29 IPv4 and /48 IPv6 (from Nocix (DataShack))
1 * CentOS 7 KVM host
1 * CentOS 6 guest
The Problem
I have the /48 my provider assigned to me, and I have one guest on the KVM host. the guest works fine with IPv6 if it's on the same segment as the host, 2604:4300:f01::/48
However, I can't ping it if it's on a segment such as a /64, such as 2604:4300:f01:5e::/64
The VM is connected to the real world using bridged networking on the host.
I can successfully ping the gateway using the /64 as well as the host, just nothing outside.
What I've tried
Nothing yet. I know nothing about IPv6.
Output from comments
ip -6 route:
neo (host)
unreachable ::/96 dev lo metric 1024 error -101
unreachable ::ffff:0.0.0.0/96 dev lo metric 1024 error -101
unreachable 2002:a00::/24 dev lo metric 1024 error -101
unreachable 2002:7f00::/24 dev lo metric 1024 error -101
unreachable 2002:a9fe::/32 dev lo metric 1024 error -101
unreachable 2002:ac10::/28 dev lo metric 1024 error -101
unreachable 2002:c0a8::/32 dev lo metric 1024 error -101
unreachable 2002:e000::/19 dev lo metric 1024 error -101
2406:e000::300 via 2604:4300:f01::1 dev viifbr0 metric 0
cache
2604:4300:f01::/48 dev viifbr0 proto kernel metric 256
unreachable 3ffe:ffff::/32 dev lo metric 1024 error -101
fe80::/64 dev enp2s0 proto kernel metric 256
fe80::/64 dev viifbr0 proto kernel metric 256
fe80::/64 dev viifv1001 proto kernel metric 256
default via 2604:4300:f01::1 dev viifbr0 metric 1
default via 2604:4300:f01::1 dev enp2s0 proto static metric 100
trinity (guest)
unreachable ::/96 dev lo metric 1024 error -101 mtu 65536 advmss 65476 hoplimit 4294967295
unreachable ::ffff:0.0.0.0/96 dev lo metric 1024 error -101 mtu 65536 advmss 65476 hoplimit 4294967295
unreachable 2002:a00::/24 dev lo metric 1024 error -101 mtu 65536 advmss 65476 hoplimit 4294967295
unreachable 2002:7f00::/24 dev lo metric 1024 error -101 mtu 65536 advmss 65476 hoplimit 4294967295
unreachable 2002:a9fe::/32 dev lo metric 1024 error -101 mtu 65536 advmss 65476 hoplimit 4294967295
unreachable 2002:ac10::/28 dev lo metric 1024 error -101 mtu 65536 advmss 65476 hoplimit 4294967295
unreachable 2002:c0a8::/32 dev lo metric 1024 error -101 mtu 65536 advmss 65476 hoplimit 4294967295
unreachable 2002:e000::/19 dev lo metric 1024 error -101 mtu 65536 advmss 65476 hoplimit 4294967295
2604:4300:f01::/48 dev eth0 proto kernel metric 256 mtu 1500 advmss 1440 hoplimit 4294967295
unreachable 3ffe:ffff::/32 dev lo metric 1024 error -101 mtu 65536 advmss 65476 hoplimit 4294967295
fe80::/64 dev eth0 proto kernel metric 256 mtu 1500 advmss 1440 hoplimit 4294967295
default via 2604:4300:f01::1 dev eth0 metric 1 mtu 1500 advmss 1440 hoplimit 4294967295
