Date: Mon, 15 Aug 2022 09:25:39 +0000 From: Benoit Chesneau <benoitc@enki-multimedia.eu> To: Benoit Chesneau <benoitc@enki-multimedia.eu> Cc: Ronald Klop <ronald-lists@klop.ws>, "freebsd-net@FreeBSD.org" <freebsd-net@freebsd.org> Subject: Re: what to check? no IPV6 pings between nodes on the same switch Message-ID: <GQsCACVdQaleA6RlMjW5LebnRhR9jPTsyWhhZPvVA0SOLj9keYDaUQ_dcGLZB3etCMhk7hRjg13epmaQtF0rrWpPeSZ3QkPrWoL43UZKOYg=@enki-multimedia.eu> In-Reply-To: <hMqENjOsAd2Dv-OG6Ge2FxSuQuyPc73a8Y4Kp2FzSdldA7QzFJGlV2AKaQjuHd3Q-k7I8uRLZ8eR44LJ9FVRdKXQ5-I623xO8BrA5PPnU38=@enki-multimedia.eu> References: <qcer8535Q1qdsyEXRpYZO7cRAnjTNz5qlcjbiwNFg7b_13lzwo15Y0-72_pOdSZnVe2AwHHNBLJbPycVb2SCS-evQV-Of1bgpBRyr1C9RU8=@enki-multimedia.eu> <718207270.67.1660552177215@localhost> <hMqENjOsAd2Dv-OG6Ge2FxSuQuyPc73a8Y4Kp2FzSdldA7QzFJGlV2AKaQjuHd3Q-k7I8uRLZ8eR44LJ9FVRdKXQ5-I623xO8BrA5PPnU38=@enki-multimedia.eu>
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[-- Attachment #1 --]
OK here is the weird but interesting thing. When I start to capture icmp6 packets using tcpdump `tcpdump -i ql0 icmp6` then ping6 starts to work. Even after stopping the capture. Any idea what could it be ?
Benoît
------- Original Message -------
On Monday, August 15th, 2022 at 10:50, Benoit Chesneau <benoitc@enki-multimedia.eu> wrote:
> 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
[-- Attachment #2 --]
<div style="font-family: arial; font-size: 14px;">OK here is the weird but interesting thing. When I start to capture icmp6 packets using tcpdump `tcpdump -i ql0 icmp6` then ping6 starts to work. Even after stopping the capture. Any idea what could it be ?</div><div style="font-family: arial; font-size: 14px;"><br></div>
<div class="protonmail_signature_block" style="font-family: arial; font-size: 14px;">
<div class="protonmail_signature_block-user">
<div style="font-style:normal;font-weight:normal;letter-spacing:normal;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none;color:rgb(0,0,0);font-family:Helvetica;font-size:12px;">Benoît </div></div></div><div class="protonmail_quote">
------- Original Message -------<br>
On Monday, August 15th, 2022 at 10:50, Benoit Chesneau <benoitc@enki-multimedia.eu> wrote:<br><br>
<blockquote class="protonmail_quote" type="cite">
<div style="font-family: arial; font-size: 14px; color: rgb(0, 0, 0);">Hi,</div><div style="font-family: arial; font-size: 14px; color: rgb(0, 0, 0);"><br></div><div style="font-family: arial; font-size: 14px; color: rgb(0, 0, 0);">Thanks for the help :) The nodes can indeed ping each others using the link-local address. What does it means? I tested to set `<span>accept_rtadv` using the ifconfig command without much success.</span></div><div style="font-family: arial; font-size: 14px; color: rgb(0, 0, 0);"><br></div><div style="font-family: arial; font-size: 14px; color: rgb(0, 0, 0);"><br></div><div style="font-family: arial; font-size: 14px; color: rgb(0, 0, 0);">Here are the ifconfigs, the prefix is the same for all To be sure, I replaced the content by <PREFIX> using sed.</div><div style="font-family: arial; font-size: 14px; color: rgb(0, 0, 0);"><br></div><div style="font-family: arial; font-size: 14px; color: rgb(0, 0, 0);">node 1:</div><div style="font-family: arial; font-size: 14px; color: rgb(0, 0, 0);"><br></div><div style="font-family: arial; font-size: 14px; color: rgb(0, 0, 0);">```</div><div style="font-family: arial; font-size: 14px; color: rgb(0, 0, 0);"><span> $ ifconfig ql0</span><div><span>ql0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500</span></div><div><span> options=507bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,TSO4,TSO6,LRO,VLAN_HWFILTER,VLAN_HWTSO></span></div><div><span> ether b4:7a:f1:7a:9c:10</span></div><div><span> inet6 <PREFIX>::11 prefixlen 64</span></div><div><span> inet6 fe80::b67a:f1ff:fe7a:9c10%ql0 prefixlen 64 scopeid 0x1</span></div><div><span> media: Ethernet autoselect (25GBase-SR <full-duplex>)</span></div><div><span> status: active</span></div><span> nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL></span><br></div><div style="font-family: arial; font-size: 14px; color: rgb(0, 0, 0);">```</div><div style="font-family: arial; font-size: 14px; color: rgb(0, 0, 0);"><br></div><div style="font-family: arial; font-size: 14px; color: rgb(0, 0, 0);">node 2:</div><div style="font-family: arial; font-size: 14px; color: rgb(0, 0, 0);"><br></div><div style="font-family: arial; font-size: 14px; color: rgb(0, 0, 0);"><span style="caret-color:rgb(0, 0, 0);background-color:rgb(255, 255, 255)">```</span><br></div><div style="font-family: arial; font-size: 14px; color: rgb(0, 0, 0);"><span> $ ifconfig ql0</span><div><span>ql0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500</span></div><div><span> options=507bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,TSO4,TSO6,LRO,VLAN_HWFILTER,VLAN_HWTSO></span></div><div><span> ether b4:7a:f1:7a:99:52</span></div><div><span> inet6 <PREFIX>::12 prefixlen 64</span></div><div><span> inet6 fe80::b67a:f1ff:fe7a:9952%ql0 prefixlen 64 scopeid 0x1</span></div><div><span> media: Ethernet autoselect (25GBase-SR <full-duplex>)</span></div><div><span> status: active</span></div><span> nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL></span><br></div><div style="font-family: arial; font-size: 14px; color: rgb(0, 0, 0);">```</div><div style="font-family: arial; font-size: 14px; color: rgb(0, 0, 0);"><br></div><div style="font-family: arial; font-size: 14px; color: rgb(0, 0, 0);"><span>node 3</span><br></div><div style="font-family: arial; font-size: 14px; color: rgb(0, 0, 0);">```</div><div style="font-family: arial; font-size: 14px; color: rgb(0, 0, 0);"><span>ifconfig ql0</span><br></div><div style="font-family: arial; font-size: 14px; color: rgb(0, 0, 0);"><span></span><div><span>ql0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500</span></div><div><span> options=507bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,TSO4,TSO6,LRO,VLAN_HWFILTER,VLAN_HWTSO></span></div><div><span> ether b4:7a:f1:18:ff:d8</span></div><div><span> inet6 <PREFIX>::13 prefixlen 64</span></div><div><span> inet6 fe80::b67a:f1ff:fe18:ffd8%ql0 prefixlen 64 scopeid 0x1</span></div><div><span> media: Ethernet autoselect (25GBase-SR <full-duplex>)</span></div><div><span> status: active</span></div><span> nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL></span><br></div><div style="font-family: arial; font-size: 14px; color: rgb(0, 0, 0);">```</div><div style="font-family: arial; font-size: 14px; color: rgb(0, 0, 0);"><span><br></span></div><div style="font-family: arial; font-size: 14px; color: rgb(0, 0, 0);"><span><br></span></div><div class="protonmail_quote">
------- Original Message -------<br>
On Monday, August 15th, 2022 at 10:29, Ronald Klop <ronald-lists@klop.ws> wrote:<br><br>
<blockquote type="cite" class="protonmail_quote">
Hi,<br>
<br>
My rc.conf config has:<br>
ifconfig_genet0_ipv6="inet6 accept_rtadv"<br>
<br>
Can you post the output of "ifconfig" and "ipfw show"?<br>
Can you ping the link-local address of the other hosts?<br>
<br>
Regards.<br>
Ronald.<br>
<br>
<p><strong>Van:</strong> Benoit Chesneau <benoitc@enki-multimedia.eu><br>
<strong>Datum:</strong> maandag, 15 augustus 2022 08:59<br>
<strong>Aan:</strong> "freebsd-net@FreeBSD.org" <freebsd-net@freebsd.org><br>
<strong>Onderwerp:</strong> what to check? no IPV6 pings between nodes on the same switch</p>
<blockquote style="padding-right: 0px; padding-left: 5px; margin-left: 5px; border-left: #000000 2px solid; margin-right: 0px">
<div class="MessageRFC822Viewer" id="P">
<div class="MultipartAlternativeViewer">
<div class="TextHTMLViewer" id="P.P.P">
<div> </div>
<span>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.</span><br>
<br>
<span>I can ping them from an external machine through the router/gateway but </span><span>the nodes can't ping each others.</span><span> When I run `ndp-a` it only return the gateway and the node ipv6 (+ their libks) but not the ips of the other nodes.</span><br>
<br>
<span>Previously these nodes wee under linux and were able to ping each others.</span><br>
<br>
<span>What could be the issue? What do I need to check?</span><br>
<br>
<span>Configuration is pretty straightforward:</span>
<div>
<div>```</div>
<div>
<p>hostname="node1.domain.tld"</p>
<p><span style="color: var(--text-color); background: var(--bg-color);">keymap="fr.macbook.kbd"</span></p>
<p>ifconfig_ql0=""</p>
<p>ifconfig_ql0_ipv6="inet6 <PREFIX>::11/64"</p>
<p>ipv6_defaultrouter="<PREFIX>::1"</p>
<p>sshd_enable="YES"</p>
<p>ntpd_enable="YES"</p>
<p># Set dumpdev to "AUTO" to enable crash dumps, "NO" to disable</p>
<p>dumpdev="AUTO"</p>
<p>zfs_enable="YES"</p>
<font color="#141414" face="Segoe UI, Helvetica Neue, Helvetica, Roboto, Oxygen, Ubuntu, Cantarell, Fira Sans, Droid Sans, sans-serif"><span>```</span></font></div>
<div>
<div><span><span>Others machines are `<PREFIX>::12`, `<PREFIX>::13`</span>Sent from Proton Mail for iOS</span></div>
</div>
</div>
<div> </div>
<div><span>Benoît </span></div>
</div>
</div>
</div>
</blockquote>
</blockquote><br>
</div>
</blockquote><br>
</div>
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