[HECnet] Re: Cisco DECnet Routing

[Tim Sneddon]

On Fri, Feb 15, 2019 at 12:27 PM Tim Sneddon <tim at sneddon.id.au> wrote:

> Hi everyone,
>
> I've some across a bit of a problem and was hoping that someone else here
> has either experienced it or is able to have a clue as to what is going on.
>
> I run a Cisco 1841 (a12rtr) here which is my link to the HECnet.  This is
> established with three GRE tunnels to area 22, 61 and 42.  This router is
> inside a network that is edged with a Cisco ASA (gatekeeper).  The router
> a12rtr also has other GRE tunnels and 6in4 tunnels.
>
> All tunnels are established and traffic is flowing over the ipv4 and ipv6
> tunnels without issue.  There is also traffic flowing over the DECnet
> tunnels as well.  However...
>
> Despite having adjacencies for the three DECnet routers on the other end
> of the DECnet tunnels, my routing table is not filling up.
>

So, I solved this problem by clearing the relevant connections on the ASA.
I'm not sure what exactly got in a knot, but it seems fixed now.  I can
once again see DECnet routes!

a12rtr>show decnet route
  Area       Cost  Hops           Next Hop to Node       Expires  Prio
*1            50     2            Tunnel51 -> 42.1022
*2            54     3            Tunnel51 -> 42.1022
*3            54     3            Tunnel51 -> 42.1022
*7            50     2            Tunnel51 -> 42.1022
*8            50     2            Tunnel51 -> 42.1022
*12            0     0             (Local) -> A12RTR
*22           20     1            Tunnel58 -> 22.1023       38     64  A+
*23           30     2            Tunnel58 -> 22.1023
*24           54     3            Tunnel51 -> 42.1022
*28           50     2            Tunnel51 -> 42.1022
*29           55     4            Tunnel51 -> 42.1022
*33           54     3            Tunnel51 -> 42.1022
*42           20     1            Tunnel51 -> 42.1022       34     64  A+
*44           50     2            Tunnel51 -> 42.1022
*46           55     4            Tunnel51 -> 42.1022
*59           50     2            Tunnel51 -> 42.1022
*61           20     1            Tunnel53 -> 61.1023       37     64  A+
*62           54     3            Tunnel51 -> 42.1022
  Node       Cost  Hops           Next Hop to Node       Expires  Prio
*(Area)        0     0             (Local) -> A12RTR
*BENDER       10     1     FastEthernet0/1 -> BENDER        47
*TRON         10     1     FastEthernet0/1 -> TRON         115
*ELYSIM       10     1     FastEthernet0/1 -> ELYSIM      1544
*A12RTR        0     0             (Local) -> A12RTR


Regards, Tim.
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