No connectivity over ZT after upgrade to 1.8.6

I have been running 1.4.6 on Linux for a couple of years and decided to upgrade to 1.8.6. After the upgrade I can’t ping anything.
With wireshark I can see broadcast traffic on the ZT interface and I can see that other nodes are sending ARP requests, which the upgraded node is not responding to.

The interface created by ZT looks like:

ztxxxxxxxx Link encap:Ethernet  HWaddr 4X:XX:XX:XX:XX:XF
          inet addr:  Bcast:  Mask:
          inet6 addr: fe80::xxxx:xxxx:xxxx:xxxx/64 Scope:Link
          RX packets:624 errors:0 dropped:0 overruns:0 frame:0
          TX packets:16 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:500
          RX bytes:39601 (38.6 KiB)  TX bytes:4036 (3.9 KiB)

If I run “ifconfig ztxxxxxxxx arp” things start working immediately. So why is the new ZT version creating the interface with “NOARP”?

I have no clue how you’re getting the NOARP flag set. This is what it looks like for all the networks on my linux box:

73: ztmjfonbjb: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 2800 qdisc fq_codel state UNKNOWN group default qlen 1000
    link/ether 3e:c6:29:d0:08:90 brd ff:ff:ff:ff:ff:ff
    inet brd scope global ztmjfonbjb
       valid_lft forever preferred_lft forever

What linux distro & kernel version are you using?

That’s how it looked on this box also with zt 1.4.6.

This box is handling a bit special HW, so it’s not really possible to update the OS, so it’s running Fedora 13 with kernel

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