[lug] can ping the host, but can't ssh for a few seconds

[Stephen Queen]

I'm a bit confused. To me it looks like you are pinging saratoga, but
trying to log into warsaw. Am I missing something?

Steve

On 7/9/12, Michael Hirsch <mdhirsch at gmail.com> wrote:
> I've got a weird problem I'm having trouble understanding.  There is a
> host, saratoga, that I'd like to ssh to in a script.  The script kept
> failing with "No route to host" but it would succeed when I try it by hand.
>
> At first I thought it was a script vs. command line issue, but that isn't
> it.
>
> It turns out that the first time I try to ssh to saratoga, I get the
> error.  Then a few seconds later I can connect.  What could be causing
> this?
>
> As you can see from the paste below, I can ping saratoga, my route seems
> reasonable, but when I try to ssh to it I get "ssh: connect to host warsaw
> port 22: No route to host".  A few seconds later, my ssh connects.  If I
> don't ssh for a few minutes, the pattern repeats.
>
> Any suggestions?
>
> Thanks,
>
> Michael
>
> [software at saratoga ~]$ ping -c 1 saratoga; /sbin/route; ssh software at warsaw
> PING saratoga.stirlingsystems.net (192.168.1.40) 56(84) bytes of data.
> 64 bytes from saratoga.stirlingsystems.net (192.168.1.40): icmp_seq=0
> ttl=64 time=0.033 ms
>
> --- saratoga.stirlingsystems.net ping statistics ---
> 1 packets transmitted, 1 received, 0% packet loss, time 0ms
> rtt min/avg/max/mdev = 0.033/0.033/0.033/0.000 ms, pipe 2
> Kernel IP routing table
> Destination     Gateway         Genmask         Flags Metric Ref    Use
> Iface
> 172.16.30.0     *               255.255.255.0   U     0      0        0
> vmnet8
> 192.168.137.0   *               255.255.255.0   U     0      0        0
> vmnet1
> 192.168.8.0     192.168.1.51    255.255.255.0   UG    0      0        0
> eth0
> 192.168.0.0     *               255.255.252.0   U     0      0        0
> eth0
> 169.254.0.0     *               255.255.0.0     U     0      0        0
> eth0
> default         192.168.1.1     0.0.0.0         UG    0      0        0
> eth0
> ssh: connect to host warsaw port 22: No route to host
> [software at saratoga ~]$
> [software at saratoga ~]$
> [software at saratoga ~]$ ssh software at warsaw
> software at warsaw's password:
>
> [software at saratoga ~]$
>