Re: what to check? no IPV6 pings between nodes on the same switch

Hi,

Thanks for the help :) The nodes can indeed ping each others using the link-local address. What does it means? I tested to set `accept_rtadv` using the ifconfig command without much success.

Here are the ifconfigs, the prefix is the same for all To be sure, I replaced the content by <PREFIX> using sed.

node 1:

```
$ ifconfig ql0
ql0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
options=507bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,TSO4,TSO6,LRO,VLAN_HWFILTER,VLAN_HWTSO>
ether b4:7a:f1:7a:9c:10
inet6 <PREFIX>::11 prefixlen 64
inet6 fe80::b67a:f1ff:fe7a:9c10%ql0 prefixlen 64 scopeid 0x1
media: Ethernet autoselect (25GBase-SR <full-duplex>)
status: active nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
```

node 2:

```
$ ifconfig ql0
ql0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
options=507bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,TSO4,TSO6,LRO,VLAN_HWFILTER,VLAN_HWTSO>
ether b4:7a:f1:7a:99:52
inet6 <PREFIX>::12 prefixlen 64
inet6 fe80::b67a:f1ff:fe7a:9952%ql0 prefixlen 64 scopeid 0x1
media: Ethernet autoselect (25GBase-SR <full-duplex>)
status: active nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
```

node 3
```
ifconfig ql0

ql0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
options=507bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,TSO4,TSO6,LRO,VLAN_HWFILTER,VLAN_HWTSO>
ether b4:7a:f1:18:ff:d8
inet6 <PREFIX>::13 prefixlen 64
inet6 fe80::b67a:f1ff:fe18:ffd8%ql0 prefixlen 64 scopeid 0x1
media: Ethernet autoselect (25GBase-SR <full-duplex>)
status: active nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
```

------- Original Message -------
On Monday, August 15th, 2022 at 10:29, Ronald Klop <ronald-lists@klop.ws> wrote:

> Hi,
>
> My rc.conf config has:
> ifconfig_genet0_ipv6="inet6 accept_rtadv"
>
> Can you post the output of "ifconfig" and "ipfw show"?
> Can you ping the link-local address of the other hosts?
>
> Regards.
> Ronald.
>
> Van: Benoit Chesneau <benoitc@enki-multimedia.eu>
> Datum: maandag, 15 augustus 2022 08:59
> Aan: "freebsd-net@FreeBSD.org" <freebsd-net@freebsd.org>
> Onderwerp: what to check? no IPV6 pings between nodes on the same switch
>
>> I have setup 3 nodes on a fresh Freebsd 13.1-RELEASE-p1. They have the same gateway and IPS are in same /64. All 3 nodes are on the same switch (mikrotik) and same vlan untagged.
>>
>> I can ping them from an external machine through the router/gateway but the nodes can't ping each others. When I run `ndp-a` it only return the gateway and the node ipv6 (+ their libks) but not the ips of the other nodes.
>>
>> Previously these nodes wee under linux and were able to ping each others.
>>
>> What could be the issue? What do I need to check?
>>
>> Configuration is pretty straightforward:
>> ```
>>
>> hostname="node1.domain.tld"
>>
>> keymap="fr.macbook.kbd"
>>
>> ifconfig_ql0=""
>>
>> ifconfig_ql0_ipv6="inet6 <PREFIX>::11/64"
>>
>> ipv6_defaultrouter="<PREFIX>::1"
>>
>> sshd_enable="YES"
>>
>> ntpd_enable="YES"
>>
>> # Set dumpdev to "AUTO" to enable crash dumps, "NO" to disable
>>
>> dumpdev="AUTO"
>>
>> zfs_enable="YES"
>>
>> ```
>> Others machines are `<PREFIX>::12`, `<PREFIX>::13`Sent from Proton Mail for iOS
>>
>> Benoît