Re: what to check? no IPV6 pings between nodes on the same switch
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- In reply to: Benoit Chesneau : "Re: what to check? no IPV6 pings between nodes on the same switch"
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Date: Mon, 15 Aug 2022 10:07:54 UTC
So I noticed that tcpdump was enabling the "promiscuous" mode to the interface. So I tried to do it manually: `ifconfig ql0 promisc` and ping worked even after disabling this mode `ifconfig ql0 -promisc`. What does happen when the promiscuous mode is enabled? I'm not sure to understand what is the issue :/ Benoît ------- Original Message ------- On Monday, August 15th, 2022 at 11:53, Benoit Chesneau <benoitc@enki-multimedia.eu> wrote: > Unfortunately I get the same results with rtsold enabled and the interface up. It doesn't seems related to teh switch since link-local ping work :/ > > Benoît > ------- Original Message ------- > On Monday, August 15th, 2022 at 11:41, Ronald Klop <ronald-lists@klop.ws> wrote: > >> Set rtsold_enable="YES" in rc.conf and restart. >> Does that help? >> >> " >> DESCRIPTION >> rtsold is the daemon program to send ICMPv6 Router Solicitation messages >> on the specified interfaces. If a node (re)attaches to a link, rtsold >> sends some Router Solicitations on the link destined to the link-local >> scope all-routers multicast address to discover new routers and to get >> non link-local addresses. >> >> rtsold should be used on IPv6 hosts (non-router nodes) only. >> " >> >> Btw: accept_rtadv makes "rtsol" to run once on startup if you set it in rc.conf and use it to boot the machine. (BTW: for me this does not work well enough, so I run rtsold explicitly.) Setting accept_rtadv by ifconfig will not run rtsol. >> >> Regards, >> Ronald. >> >> Van: Benoit Chesneau <benoitc@enki-multimedia.eu> >> Datum: maandag, 15 augustus 2022 11:25 >> Aan: Benoit Chesneau <benoitc@enki-multimedia.eu> >> CC: Ronald Klop <ronald-lists@klop.ws>, "freebsd-net@FreeBSD.org" <freebsd-net@freebsd.org> >> Onderwerp: Re: what to check? no IPV6 pings between nodes on the same switch >> >>> 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