Graphpath generates an ASCII network diagram from the route table of a Unix/Linux router. It's a BSDRP's tool.
None: it's just a shell script using standards tools (route, arp, ifconfig on *BSD and ip on Linux).
Here are some graphpath output:
[root@me]~# graphpath 10.0.11.11 10.0.12.12
+----------------------------+ +----------------------------+
| SOURCE HOST | | DESTINATION HOST |
| IP: 10.0.11.11 | | IP: 10.0.12.12 |
+----------------------------+ +----------------------------+
| |
+----------------------------+ +----------------------------+
| ROUTER TOWARDS SOURCE | | ROUTER TOWARDS DESTINATION |
| IP: 10.0.1.11 | | IP: 10.0.1.12 |
| ARP: 02:01:32:38:b0:03 | | ARP: 02:01:32:38:b0:04 |
+----------------------------+ +----------------------------+
| |
--+---+-----------------------------+---
|
+----------------------------+
| IF: bridge1 |
| MAC: 02:ab:de:8c:30:01 |
| IP: 10.0.1.1 |
| net: 10.0.11.0 |
| mask: 255.255.255.0 |
| |
| THIS ROUTER |
+----------------------------+
[root@me]~# graphpath 2001:db8:11::11 2001:db8:1::12
+---------------------------------------------------+ +---------------------------------------------------+
| SOURCE HOST | | DESTINATION HOST |
| IP: 2001:db8:11::11 | | IP: 2001:db8:1::12 |
| | | NDP: 02:01:c9:01:b0:04 |
+---------------------------------------------------+ +---------------------------------------------------+
| |
+---------------------------------------------------+ |
| ROUTER TOWARDS SOURCE | |
| IP: 2001:db8:1::11 | |
| NDP: 02:01:c9:01:b0:03 | |
+---------------------------------------------------+ |
| |
--+---+----------------------------------------------+---
|
+---------------------------------------------------+
| IF: bridge1 |
| MAC: 02:de:f2:41:54:01 |
| IP: 2001:db8:1::1 |
| net: 2001:db8:11:: |
| mask: ffff:ffff:ffff:ffff:: |
| |
| THIS ROUTER |
+---------------------------------------------------+
[root@me]~# graphpath 10.0.11.11 10.0.21.21
+----------------------------+
| SOURCE HOST |
| IP: 10.0.11.11 |
+----------------------------+
|
+----------------------------+
| ROUTER TOWARDS SOURCE |
| IP: 10.0.1.11 |
| ARP: 02:01:32:38:b0:03 |
+----------------------------+
|
+----------------------------+
| IF: bridge1 |
| MAC: 02:ab:de:8c:30:01 |
| IP: 10.0.1.1 |
| net: 10.0.11.0 |
| mask: 255.255.255.0 |
| |
| THIS ROUTER |
| |
| net: 10.0.21.0 |
| mask: 255.255.255.0 |
| IP: 10.0.2.1 |
| MAC: 02:ab:de:8c:30:02 |
| IF: bridge2 |
+----------------------------+
|
+----------------------------+
| ROUTER TOWARDS DESTINATION |
| IP: 10.0.2.21 |
| ARP: 02:02:32:38:b0:05 |
+----------------------------+
|
+----------------------------+
| DESTINATION HOST |
| IP: 10.0.21.21 |
+----------------------------+
[root@me]~# graphpath 10.0.11.11 10.0.1.12
+----------------------------+ +----------------------------+
| SOURCE HOST | | DESTINATION HOST |
| IP: 10.0.11.11 | | IP: 10.0.1.12 |
| | | ARP: 02:01:32:38:b0:04 |
+----------------------------+ +----------------------------+
| |
+----------------------------+ |
| ROUTER TOWARDS SOURCE | |
| IP: 10.0.1.11 | |
| ARP: 02:01:32:38:b0:03 | |
+----------------------------+ |
| |
--+---+-----------------------------+---
|
+----------------------------+
| IF: bridge1 |
| MAC: 02:ab:de:8c:30:01 |
| IP: 10.0.1.1 |
| net: 10.0.11.0 |
| mask: 255.255.255.0 |
| |
| THIS ROUTER |
+----------------------------+
[root@me]~# graphpath 10.0.1.12 10.0.11.11
+----------------------------+ +----------------------------+
| SOURCE HOST | | DESTINATION HOST |
| IP: 10.0.1.12 | | IP: 10.0.11.11 |
| ARP: 02:01:32:38:b0:04 | | |
+----------------------------+ +----------------------------+
| |
| +----------------------------+
| | ROUTER TOWARDS DESTINATION |
| | IP: 10.0.1.11 |
| | ARP: 02:01:32:38:b0:03 |
| +----------------------------+
| |
--+---+-----------------------------+---
|
+----------------------------+
| IF: bridge1 |
| MAC: 02:ab:de:8c:30:01 |
| IP: 10.0.1.1 |
| net: 10.0.1.0 |
| mask: 255.255.255.0 |
| |
| THIS ROUTER |
+----------------------------+