unable to exchange Iperf tcp traffic between BT and VM in GPO rack

[lnevers@bbn.com]

Created a sliver EG-MON-4-exp2 that includes 1 VM and one Bare Metal node. Able to exchange traffic between the two hosts, but am not able to exchange iperf TCP traffic it fails with a "No route to host" even though a route exists:

root@debian:~# /sbin/ifconfig eth1
eth1      Link encap:Ethernet  HWaddr fe:16:3e:00:31:74  
          inet addr:172.16.1.2  Bcast:172.16.1.255  Mask:255.255.255.0
          inet6 addr: fe80::fc16:3eff:fe00:3174/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:132 errors:0 dropped:0 overruns:0 frame:0
          TX packets:2730 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:38496 (37.5 KiB)  TX bytes:4008088 (3.8 MiB)

root@debian:~# ping 172.16.1.1 -c 4
PING 172.16.1.1 (172.16.1.1) 56(84) bytes of data.
64 bytes from 172.16.1.1: icmp_req=2 ttl=64 time=0.497 ms
64 bytes from 172.16.1.1: icmp_req=3 ttl=64 time=0.365 ms
64 bytes from 172.16.1.1: icmp_req=4 ttl=64 time=0.328 ms
--- 172.16.1.1 ping statistics ---
4 packets transmitted, 3 received, 25% packet loss, time 2999ms
rtt min/avg/max/mdev = 0.328/0.396/0.497/0.076 ms

root@debian:~# iperf -c 172.16.1.1       
connect failed: No route to host
root@debian:~#

Also tried iperf UDP, and it reports the "No route to host" failure, but it runs to completion:

root@debian:~# iperf -c 172.16.1.1 -t 10 -u    
------------------------------------------------------------
Client connecting to 172.16.1.1, UDP port 5001
Sending 1470 byte datagrams
UDP buffer size:   122 KByte (default)
------------------------------------------------------------
[  3] local 172.16.1.2 port 42064 connected with 172.16.1.1 port 5001
read failed: No route to host
[  3] WARNING: did not receive ack of last datagram after 1 tries.
[ ID] Interval       Transfer     Bandwidth
[  3]  0.0-10.0 sec  1.23 MBytes  1.03 Mbits/sec
[  3] Sent 893 datagrams

[lnevers@bbn.com]

After re-creating the sliver, this just works... Strange! Will recreate the sliver sever times to determine how often the "No Route to Host" problem occurs.