Date: Wed, 30 May 2018 22:27:06 +0200 From: "Herbert J. Skuhra" <herbert@gojira.at> To: freebsd-net@freebsd.org Subject: Re: 'no route to host" for cloned lo1 iface 12.0-CURRENT r334376+56a973815425(master) amd64 Message-ID: <876034evol.wl-herbert@gojira.at> In-Reply-To: <201805301546.w4UFk659072611@pdx.rh.CN85.dnsmgr.net> References: <20180530150304.GB70394@mail.bsd4all.net> <201805301546.w4UFk659072611@pdx.rh.CN85.dnsmgr.net>
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On Wed, 30 May 2018 17:46:06 +0200, "Rodney W. Grimes" wrote:
>
> > On Wed, May 30, 2018 at 07:44:52AM -0700, Rodney W. Grimes wrote:
> > > > On Wed, May 30, 2018 at 03:59:12PM +0200, Andreas Nilsson wrote:
> > > > > On Wed, May 30, 2018 at 3:40 PM, Dave Cottlehuber <dch@skunkwerks.at> wrote:
> > > > >
> > > > > > I have 10.241.0.0-15/16 bound to lo1 for jails, and I just realised it
> > > > > > doesn't work anymore. Boxes at $DAYJOB use the same config and work just
> > > > > > fine on 11.1R/amd64, otherwise I'd be fired.... this used to work ~ 1 month
> > > > > > ago, both on my desktop, and my laptop, and now doesn't.
> > > > > >
> > > > > > Have I mis-configured something blindingly obvious here before I embark
> > > > > > on a lengthy bisect?
> > > > > >
> > > > > > # grep -v \# /etc/rc.conf , elided
> > > > > > hostname=akai
> > > > > > kld_list="${kld_list} if_iwm if_axge if_ure if_ue"
> > > > > > ifconfig_ue0=DHCP
> > > > > > ifconfig_ue0_ipv6="inet6 accept_rtadv"
> > > > > > wlans_iwm0="wlan0"
> > > > > > ifconfig_wlan0="WPA DHCP"
> > > > > > ifconfig_wlan0_ipv6="inet6 accept_rtadv"
> > > > > > create_args_wlan0="country AT regdomain ETSI"
> > > > > > cloned_interfaces="${cloned_interfaces} lo1"
> > > > > > ifconfig_lo1_aliases="inet 10.241.0.0-15/16"
> > > > > > ip6addrctl_policy="ipv4_prefer"
> > > > > >
> > > > > > # netstat -4rn
> > > > > > Internet:
> > > > > > Destination Gateway Flags Netif Expire
> > > > > > default 172.16.2.1 UGS ue0
> > > > > > 10.241.0.0 link#4 UH lo1
> > > > > > 10.241.0.1 link#4 UH lo1
> > > > > > 10.241.0.2 link#4 UH lo1
> > > > > > 10.241.0.3 link#4 UH lo1
> > > > > > 10.241.0.4 link#4 UH lo1
> > > > > > 10.241.0.5 link#4 UH lo1
> > > > > > 10.241.0.6 link#4 UH lo1
> > > > > > 10.241.0.7 link#4 UH lo1
> > > > > > 10.241.0.8 link#4 UH lo1
> > > > > > 10.241.0.9 link#4 UH lo1
> > > > > > 10.241.0.10 link#4 UH lo1
> > > > > > 10.241.0.11 link#4 UH lo1
> > > > > > 10.241.0.12 link#4 UH lo1
> > > > > > 10.241.0.13 link#4 UH lo1
> > > > > > 10.241.0.14 link#4 UH lo1
> > > > > > 10.241.0.15 link#4 UH lo1
> > > > > > 127.0.0.1 link#1 UH lo0
> > > > > > 172.16.2.0/24 link#2 U ue0
> > > > > > 172.16.2.92 link#3 UHS lo0
> > > > > > 172.16.2.93 link#2 UHS lo0
> > > > > >
> > > > > > # ifconfig
> > > > > > lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
> > > > > > options=680003<RXCSUM,TXCSUM,LINKSTATE,RXCSUM_IPV6,TXCSUM_IPV6>
> > > > > > inet6 ::1 prefixlen 128
> > > > > > inet6 fe80::1%lo0 prefixlen 64 scopeid 0x1
> > > > > > inet 127.0.0.1 netmask 0xff000000
> > > > > > nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
> > > > > > groups: lo
> > > > > > ue0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
> > > > > > options=8000b<RXCSUM,TXCSUM,VLAN_MTU,LINKSTATE>
> > > > > > ether 74:da:38:d8:fe:a7
> > > > > > inet6 fe80::76da:38ff:fed8:fea7%ue0 prefixlen 64 scopeid 0x2
> > > > > > inet 172.16.2.93 netmask 0xffffff00 broadcast 172.16.2.255
> > > > > > nd6 options=23<PERFORMNUD,ACCEPT_RTADV,AUTO_LINKLOCAL>
> > > > > > media: Ethernet autoselect (1000baseT <full-duplex>)
> > > > > > status: active
> > > > > > wlan0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric
> > > > > > 0 mtu 1500
> > > > > > ether 00:28:f8:d0:91:52
> > > > > > inet6 fe80::228:f8ff:fed0:9152%wlan0 prefixlen 64 scopeid 0x3
> > > > > > inet 172.16.2.92 netmask 0xffffff00 broadcast 172.16.2.255
> > > > > > nd6 options=23<PERFORMNUD,ACCEPT_RTADV,AUTO_LINKLOCAL>
> > > > > > media: IEEE 802.11 Wireless Ethernet OFDM/54Mbps mode 11g
> > > > > > status: associated
> > > > > > ssid skunkwerks channel 6 (2437 MHz 11g) bssid 80:2a:a8:5a:bd:3f
> > > > > > regdomain ETSI country AT authmode WPA2/802.11i privacy ON
> > > > > > deftxkey UNDEF AES-CCM 2:128-bit txpower 30 bmiss 10 scanvalid 60
> > > > > > protmode CTS wme roaming MANUAL
> > > > > > groups: wlan
> > > > > > lo1: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
> > > > > > options=680003<RXCSUM,TXCSUM,LINKSTATE,RXCSUM_IPV6,TXCSUM_IPV6>
> > > > > > inet 10.241.0.0 netmask 0xffff0000
> > > > > > inet 10.241.0.1 netmask 0xffffffff
> > > > > > inet 10.241.0.2 netmask 0xffffffff
> > > > > > inet 10.241.0.3 netmask 0xffffffff
> > > > > > inet 10.241.0.4 netmask 0xffffffff
> > > > > > inet 10.241.0.5 netmask 0xffffffff
> > > > > > inet 10.241.0.6 netmask 0xffffffff
> > > > > > inet 10.241.0.7 netmask 0xffffffff
> > > > > > inet 10.241.0.8 netmask 0xffffffff
> > > > > > inet 10.241.0.9 netmask 0xffffffff
> > > > > > inet 10.241.0.10 netmask 0xffffffff
> > > > > > inet 10.241.0.11 netmask 0xffffffff
> > > > > > inet 10.241.0.12 netmask 0xffffffff
> > > > > > inet 10.241.0.13 netmask 0xffffffff
> > > > > > inet 10.241.0.14 netmask 0xffffffff
> > > > > > inet 10.241.0.15 netmask 0xffffffff
> > > > > > nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
> > > > > > groups: lo
> > > > > > bridge0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu
> > > > > > 1500
> > > > > > description: vm-public
> > > > > > ether 02:63:d4:40:fe:00
> > > > > > nd6 options=1<PERFORMNUD>
> > > > > > groups: bridge
> > > > > > id 00:00:00:00:00:00 priority 0 hellotime 2 fwddelay 15
> > > > > > maxage 20 holdcnt 6 proto rstp maxaddr 2000 timeout 1200
> > > > > > root id 00:00:00:00:00:00 priority 0 ifcost 0 port 0
> > > > > > member: wlan0 flags=143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
> > > > > > ifmaxaddr 0 port 3 priority 128 path cost 370370
> > > > >
>
> > > > >
> > > > > could you specify what exactly isn't working? How does the bridge fit into
> > > > > this setup?
> > > > >
> > > > > Best regards
> > > > > Andreas
> > > >
> > > > Hi,
> > > >
> > > > I think the problem is "No route to host".
> > >
> > > What command is trying to execute when this error is returned
> > > would help a great deal in trying to understand why it failed.
> >
> > I've just added the lines
> >
> > cloned_interfaces="lo1"
> > ifconfig_lo1_aliases="inet 10.241.0.0-15/16"
> >
> > to my rc.conf and rebooted.
> >
> > % ping 10.241.0.0
> > PING 10.241.0.0 (10.241.0.0): 56 data bytes
> > ping: sendto: No route to host
> >
> > Changed lines to
> >
> > cloned_interfaces="lo1"
> > ifconfig_lo1="inet 10.241.0.0 netmask 0xffff0000"
> That is technically an invalid ifconfig.
> Your not suppose to use the "0"th host of a network.
>
> > ifconfig_lo1_aliases="inet 10.241.0.1-15 netmask 0xffffffff"
> >
> > and rebooted.
> >
> > % ping 10.241.0.0
> > PING 10.241.0.0 (10.241.0.0): 56 data bytes
> > 64 bytes from 10.241.0.0: icmp_seq=0 ttl=64 time=0.085 ms
>
> Sending a packet to the "0"th IP on a network has special
> meaning, I just can not recall or find right now what that
> special meaning is and where it is documented. Is it
> "this host" on that network?
>
> Either way it is invalid to configure a "host" at an address
> that the host part of a ip address is all 0's, as that is
> reserved to mean "the network".
>
> Not that 10.241.1.0 IS a valid address, because of the subnet mask
> being /16 the host part contains 1.0, a valid non zero host part.
Thanks. I wouldn't use such a network configuration myself. Just
wondering why one example works and the other doesn't although output
of e.g. ifconfig and netstat looks the same. And why Daves' configuration
worked before and nolonger does.
--
Herbert
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