anyone know what 'ping: sendto: Can't assign requested" means

[doug]

On Mon, 19 Dec 2016, Anton Yuzhaninov wrote:

> On 12/06/16 13:33, DTD wrote:
>> 
>> So the question comes down to under what conditions does ping give the
>> 'sendto:
>> Can't assign requested address' error. I have not been able to get that to
>> happen outside of a jailed environment.
>
> Outside jails this error happens when you ping address from 127.0.0.0/8 (but 
> not 127.0.0.1)
>
> :~> ping 127.0.0.2
> PING 127.0.0.2 (127.0.0.2): 56 data bytes
> ping: sendto: Can't assign requested address

Sorry to be dense but I do not understand the comment. I have a LAN with a few 
hosts:

    192.168.2.1  (ISP gateway)
    tardis.boltsys.com (192.168.2.22)
    lilac.boltsys.com (192.168.2.44)
    zeus.boltsys.com (192.168.2.45)
    thor.boltsys.com (192.168.2.104)
    192.168.2.105
    hphub.boltsys.com (192.168.2.106)
    192.168.2.107
    gaia.boltsys.com (192.168.2.110)
    gsscc.boltsys.com (192.168.2.111)
    odin.boltsys.com (192.168.2.112)
    aether.boltsys.com (192.168.2.113)
    chaos.boltsys.com (192.168.2.117)
    pontos.boltsys.com (192.168.2.118)
    192.168.2.120
    192.168.2.125
    artemis.boltsys.com (192.168.2.102)

The jail host is chaos, jails are gaia, gsscc, and pontos. Without showing 
examples of all the pings, what I have is that any jail can ping the other jails 
and the host but can not ping any other host in 192.168.2.0/24, e.g., using 
gaia:

em0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500

options=4219b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4,WOL_MAGIC,VLAN_HWTSO>
         ether c8:9c:dc:eb:ab:fb
         inet 192.168.2.110 netmask 0xffffffff broadcast 192.168.2.110
         media: Ethernet autoselect (100baseTX <full-duplex>)
         status: active
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
         options=600003<RXCSUM,TXCSUM,RXCSUM_IPV6,TXCSUM_IPV6>
lo1: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
         options=600003<RXCSUM,TXCSUM,RXCSUM_IPV6,TXCSUM_IPV6>
         inet 127.0.1.1 netmask 0xffffffff

gaia:~> ping -c 1 gsscc
PING gsscc.boltsys.com (192.168.2.111): 56 data bytes
64 bytes from 192.168.2.111: icmp_seq=0 ttl=64 time=0.025 ms
--
gaia:~> ping -c 1 pontos
PING pontos.boltsys.com (192.168.2.118): 56 data bytes
64 bytes from 192.168.2.118: icmp_seq=0 ttl=64 time=0.021 ms
---
gaia:~> ping -c 1 artemis
PING artemis.boltsys.com (192.168.2.102): 56 data bytes
ping: sendto: Can't assign requested address

pinging localhost works
gaia:~> ping -c 1 localhost
PING localhost (127.0.1.1): 56 data bytes
64 bytes from 127.0.1.1: icmp_seq=0 ttl=64 time=0.027 ms

and (obviously)

gaia:~> ping -c 1 microosoft.com
PING microosoft.com (52.178.167.109): 56 data bytes
ping: sendto: Can't assign requested address

Does not.

So either that's the way it is suppost to work or there is a 9.3 bug. I assume I 
could use chaos as a gateway and use NAT via pf/ipfw but thats not worth the 
effort in the production systems, I can just ping from the host.

So my question stands. I can not find out what that error means and do not know 
how to reproduce it outside of a jail.