ipv6 only host and no IPV4 in jail?

From: Benoit Chesneau <benoitc_at_enki-multimedia.eu>
Date: Mon, 02 Oct 2023 09:21:52 UTC 
Hi all,

I have a weird issue there,

I have an ipv6 only host aon which I am starting a jail.Jalil have a vnet interface through a bridge created on the host:

For some reason the jail can't get access and is not accessible to internet when I setup an IPV4 on it (and right gateway). Is this something expected? SHould the Host be also IPV4 aware?

Host config:

Host:
```
vlan200bridge: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 9000
ether 58:9c:fc:10:fc:41
id 00:00:00:00:00:00 priority 32768 hellotime 2 fwddelay 15
maxage 20 holdcnt 6 proto rstp maxaddr 2000 timeout 1200
root id 00:00:00:00:00:00 priority 32768 ifcost 0 port 0
member: e0a_bastille4 flags=143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
ifmaxaddr 0 port 8 priority 128 path cost 2000
member: tap0 flags=143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
ifmaxaddr 0 port 9 priority 128 path cost 2000000
member: tap1 flags=143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
ifmaxaddr 0 port 10 priority 128 path cost 2000000
member: vlan200 flags=143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
ifmaxaddr 0 port 6 priority 128 path cost 800 groups: bridge

e0a_bastille4: flags=8963<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0 mtu 9000
description: vnet host interface for Bastille jail fpcouchdb
options=8<VLAN_MTU>
ether 02:20:9c:4c:84:f0
hwaddr 02:c4:b5:3a:91:0a
groups: epair
media: Ethernet 10Gbase-T (10Gbase-T <full-duplex>)
status: active nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
```

Guest

```
# ifconfig vnet0
vnet0: flags=8863<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
options=8<VLAN_MTU>
ether 0e:20:9c:4c:84:f0
hwaddr 02:c4:b5:3a:91:0b
inet6 XXXX:XXXX:XXXX:200::30 prefixlen 64
inet6 fe80::c20:9cff:fe4c:84f0%vnet0 prefixlen 64 scopeid 0x2
inet 10.200.1.8 netmask 0xffffff00 broadcast 10.200.1.255
groups: epair
media: Ethernet 10Gbase-T (10Gbase-T <full-duplex>)
status: active nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
# netstat -rn4
Routing tables

Internet:
Destination Gateway Flags Netif Expire
default 10.200.1.1 UGS vnet0
10.200.1.0/24 link#2 U vnet0
10.200.1.8 link#2 UHS lo0127.0.0.1 link#1 UH lo0

```

Benoît Chesneau, Enki Multimedia
—
t. +33608655490

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