[HECnet] GRE mesh | Tunnel to Area 23?

My GRE tunnel to Mark Thomas' Area 23 is down for a few days now. All other tunnels are up. Here's the interface; any advice appreciated. Thank you. Tunnel23 is up, line protocol is up ? Hardware is Tunnel ? Description: HECnet tunnel for Mark G Thomas (Area 23) [Version:307] ? MTU 1514 bytes, BW 9 Kbit/sec, DLY 500000 usec, ???? reliability 255/255, txload 1/255, rxload 1/255 ? Encapsulation TUNNEL, loopback not set ? Keepalive not set ? Tunnel source 10.42.2.204 (FastEthernet0/1), destination 71.246.8.102 ? Tunnel protocol/transport GRE/IP ??? Key disabled, sequencing disabled ??? Checksumming of packets disabled ? Tunnel TTL 255 ? Fast tunneling enabled ? Path MTU Discovery, ager 10 mins, min MTU 92, MTU 0, expires never ? Tunnel transmit bandwidth 8000 (kbps) ? Tunnel receive bandwidth 8000 (kbps) ? Last input 1w5d, output 00:00:04, output hang never ? Last clearing of "show interface" counters never ? Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0 ? Queueing strategy: fifo ? Output queue: 0/0 (size/max) ? 5 minute input rate 0 bits/sec, 0 packets/sec ? 5 minute output rate 0 bits/sec, 0 packets/sec ???? 74013 packets input, 5838030 bytes, 0 no buffer ???? Received 0 broadcasts, 0 runts, 0 giants, 0 throttles ???? 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort ???? 213256 packets output, 13234292 bytes, 0 underruns ???? 0 output errors, 0 collisions, 0 interface resets ???? 0 unknown protocol drops ???? 0 output buffer failures, 0 output buffers swapped out CISCO7204VXR_IMPRTR>show decnet route ? Area?????? Cost? Hops?????????? Next Hop to Node Expires? Prio *1??????????? 13???? 2???? FastEthernet0/0 -> IMPVAX *2??????????? 22???? 4???? FastEthernet0/0 -> IMPVAX *4??????????? 21???? 3???? FastEthernet0/0 -> IMPVAX *5??????????? 21???? 3???? FastEthernet0/0 -> IMPVAX *7??????????? 21???? 3???? FastEthernet0/0 -> IMPVAX *8??????????? 21???? 3???? FastEthernet0/0 -> IMPVAX *12?????????? 20???? 1??????????? Tunnel12 -> A12RTR 35???? 64? A+ *19?????????? 21???? 3???? FastEthernet0/0 -> IMPVAX *22?????????? 20???? 1??????????? Tunnel22 -> A22RTR 44???? 64? A+ *23?????????? 30???? 2??????????? Tunnel22 -> A22RTR *24?????????? 16???? 3???? FastEthernet0/0 -> IMPVAX *27?????????? 10???? 2???? FastEthernet0/0 -> IMPVAX *28?????????? 21???? 3???? FastEthernet0/0 -> IMPVAX *29?????????? 13???? 2???? FastEthernet0/0 -> IMPVAX *30?????????? 10???? 2???? FastEthernet0/0 -> IMPVAX *31??????????? 0???? 0???????????? (Local) -> IMPRTR *33?????????? 21???? 3???? FastEthernet0/0 -> IMPVAX *34?????????? 24???? 4???? FastEthernet0/0 -> IMPVAX *39??????????? 8???? 2???? FastEthernet0/0 -> IMPVAX *41??????????? 8???? 2???? FastEthernet0/0 -> IMPVAX *42?????????? 20???? 1??????????? Tunnel42 -> HUB 32???? 64? A+ *55?????????? 21???? 3???? FastEthernet0/0 -> IMPVAX *59?????????? 17???? 3???? FastEthernet0/0 -> IMPVAX *60?????????? 21???? 3???? FastEthernet0/0 -> IMPVAX *61?????????? 20???? 1??????????? Tunnel61 -> A61RTR 36???? 64? A+ -- Sent via Thunderbird/MX-Linux on an overheated Compaq Presario CQ61