Tim, Just discovered the ping decnet command in IOS Can ping you 12.1023 and 12.2 from the router which is good; can ping 22.10 from the router which is also good; but for some reason i cannot connect from VAX (22.10) on FastEthernet0/1 to 12.2. This must be a local issue. Is there anything else I need to setup above what I have for FE0/1 and decnet on my router? decnet routing 22.100 decnet node-type area interface FastEthernet0/1 ip address 10.22.1.254 255.255.255.0 speed auto full-duplex lat enabled decnet cost 4 and my tunnel to you which I don t think is the problem interface Tunnel57 description HECnet tunnel for Tim Sneddon (Area 12) [Version:274] no ip address decnet cost 20 tunnel source FastEthernet0/1 tunnel destination 120.146.225.243 tunnel path-mtu-discovery Mark On 2 Jan 2015, at 15:32, Mark Darvill <mark.darvill at mac.com> wrote: Hi Tim, DECnet on this test system is just Decnet IV running on VMS 7.3. I can t do a loop node to 12.1023 but not sure that would work anyway if it is a cisco. Also can t seem to get to 12.2. Have just rebooted 22.10 as SIMH may have crashed. Mark On 2 Jan 2015, at 15:15, Tim Sneddon <tim at sneddon.id.au> wrote: On Fri, Jan 2, 2015 at 6:16 PM, Mark Darvill <mark.darvill at mac.com> wrote: HI, I have been playing with my cisco router and a SIMH Vax over the break. from my router I can see the following neighbours cmrtr01#show decnet nei Net Node Interface MAC address Flags 0 12.1023 Tunnel57 0000.0000.0000 A 0 42.1022 Tunnel51 0000.0000.0000 A 0 61.1023 Tunnel53 0000.0000.0000 A 0 22.10 FastEthernet0/1 aa00.0400.0a58 V and the following routes cmrtr01#show decnet route Area Cost Hops Next Hop to Node Expires Prio *1 50 2 Tunnel51 -> 42.1022 *2 52 4 Tunnel51 -> 42.1022 *3 51 3 Tunnel51 -> 42.1022 *7 50 2 Tunnel51 -> 42.1022 *8 50 2 Tunnel51 -> 42.1022 *9 40 2 Tunnel57 -> 12.1023 *11 50 2 Tunnel51 -> 42.1022 *12 20 1 Tunnel57 -> 12.1023 44 64 A+ *18 51 3 Tunnel51 -> 42.1022 *19 50 2 Tunnel51 -> 42.1022 *22 0 0 (Local) -> 22.100 *23 40 2 Tunnel53 -> 61.1023 *28 50 2 Tunnel51 -> 42.1022 *33 51 3 Tunnel51 -> 42.1022 *39 51 3 Tunnel51 -> 42.1022 *42 20 1 Tunnel51 -> 42.1022 45 64 A+ *47 50 2 Tunnel51 -> 42.1022 *59 50 2 Tunnel51 -> 42.1022 *61 20 1 Tunnel53 -> 61.1023 38 64 A+ Node Cost Hops Next Hop to Node Expires Prio *(Area) 0 0 (Local) -> 22.100 *22.10 4 1 FastEthernet0/1 -> 22.10 33 64 V *22.100 0 0 (Local) -> 22.100 My SIMH Vax can see my router and has an adjacency. My node is 22.10 and router 22.100 Can anyone see area 22 as I don t seem to be able to communicate elsewhere. Hi Mark, My network is 12, your Tunnel57 hooks into my router. From my router I am able to ping 22.100, but I cannot reach 22.10. Are you able to hit my router (12.1023) or my VAX (12.2)? Which version of DECnet are you running on 22.10? I am happy to help you figure out what might be going on. Regards, Tim.