No connectivity over ZT after upgrade to 1.8.6

[hg11]

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:10.147.20.15  Bcast:10.147.20.255  Mask:255.255.255.0
          inet6 addr: fe80::xxxx:xxxx:xxxx:xxxx/64 Scope:Link
          UP BROADCAST NOTRAILERS RUNNING NOARP ALLMULTI MULTICAST  MTU:2800  Metric:1
          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”?

[zt-grant]

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 10.6.6.90/23 brd 10.6.7.255 scope global ztmjfonbjb
       valid_lft forever preferred_lft forever

What linux distro & kernel version are you using?

[hg11]

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 2.6.34.6-54.fc13.x86_64