IPv6 networking problem

S

Switch2BSD

I have 11.4 run with dual stack, IPv4 works well but static config IPv6 pingable at boot time, after that it’s off. Ipv6 works well if I install Debian.
Where should I start to investigate?
 
Short of a crystal ball, you'd typically need to see the relevant configuration (everything related to the interfaces from /etc/rc.conf) plus what you tried (commands), what you expected and what happened instead…
 
Sorry for output. I was banned from forums and had to use 3G on phone to access the forum. Perhaps when I go to cafe with the laptop I will put the output later.
I use static ipv6 config in rc.conf and ifconfig show properly what I want, netstat -r show gateway of ipv6, also I can ping the gateway.
 
I have IPv6 working here for at least a decade, without issues. Using a mix of static addresses and SLAAC hosts. So it's not a common problem.

Switch2BSD said:
In fact, it works until I ping 9-10 times.
Click to expand...
Firewall? Sounds like the interface works until the firewall rules get loaded. Or maybe it's some badly configured overload rule.
 
No Sir, just only static ip6 config (that will work for a century on debian, perhaps). Because it stops after booted, I have checked for firewall, but the system is newly installed with base setup.
Strangely, ipv4 works then stops after I add a virtual switch (as guided of vm-bhyve).
I think network card firmware/config causing problem.
P/S: I dont know why I cannot access forums from my ISP (dynamic IP)
 
Switch2BSD said:
Strangely, ipv4 works then stops after I add a virtual switch (as guided of vm-bhyve).
I think network card firmware/config causing problem.
Click to expand...
It works best if you bridge to a interface that has no local addresses assigned to it. I.e. reserve an interface specifically for bridging with VMs.
 
After hard reboot the machine, I could traceroute6 to google, but it stops at 7th hop. No firewall at all. I have changed ixl to ixgbe interface load, but the same result. While searching SuperMicro X10SDV-4C-TLN2F (Intel Xeon 15xx): it was a problem in 2015-2017.
 
Switch2BSD said:
While searching SuperMicro X10SDV-4C-TLN2F (Intel Xeon 15xx)
Click to expand...
Mine's a lot older, X8DT3-LN4F, running 13.0-STABLE at the moment but was upgraded over the years from 11-STABLE to 12-STABLE and recently 13-STABLE.

I would suggest upgrading to 12.2 though. FreeBSD 11 is going to go EoL some time soon (no definitive date yet but it's bound to happen once 13.0 is ready).
 
File /etc/rc.conf was:
Code: 
zfs_enable="YES"
ipv6_enable="YES"
# Network configuration (IPv4)
ifconfig_ix0="inet 149.xxx.zzz.147 netmask 255.255.255.0 broadcast 149.xxx.zzz.255"
defaultrouter="149.xxx.zzz.254"

# Network configuration (IPv6)
ifconfig_ix0_ipv6="inet6 2607:abc:xx:zzz::1 prefixlen 64 accept_rtadv no_radr"
ipv6_network_interfaces="ix0"
ipv6_default_interface="ix0"
ipv6_defaultrouter="2607:abc:xx:zff:ff:ff:ff:ff"
ipv6_route_abcgw="2607:abc:xx:zff:ff:ff:ff:ff -prefixlen 64 -interface ix0"
ipv6_static_routes="abcgw"

I have just changed abcgw into xyzgw, but it works!
As you mentioned, should I delete 2 last lines?
Code: 
# Network configuration (IPv6)
ifconfig_ix0_ipv6="inet6 2607:abc:xx:zzz::1 prefixlen 64 accept_rtadv no_radr"
ipv6_defaultrouter="2607:abc:xx:zff:ff:ff:ff:ff"
 
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