How to understand the routing table of otbr?

[luyou-tuya]

The routing table of otbr is as follows, and the information output by the routing table cannot be well understood
otbr RLOC16 is 0xd800
If I want to send data to the sub-device whose RLOC is 0x1802, the data packet reaches otbr, otbr searches the routing table, finds that the next hop is router id 38, and then it will be sent to the route with route id 38 for forwarding, so understand ? Why doesn't it send directly to its parent node rloc 0x1800。

| ID | RLOC16 | Next Hop | Path Cost | LQ In | LQ Out | Age | Extended MAC     | Link |
+----+--------+----------+-----------+-------+--------+-----+------------------+------+
|  2 | 0x0800 |       28 |         1 |     3 |      3 |  27 | f67f590fadf06b9e |    1 |
|  6 | 0x1800 |       38 |         1 |     3 |      2 |  52 | 3622b3e959353775 |    1 |
|  9 | 0x2400 |       38 |         1 |     3 |      2 |  24 | fe4bf19586658d38 |    1 |
| 12 | 0x3000 |       28 |         1 |     3 |      3 |  22 | 6e169d7c2a72bf25 |    1 |
| 16 | 0x4000 |       38 |         1 |     3 |      3 |  20 | bed500d869ea9e5e |    1 |
| 18 | 0x4800 |       28 |         1 |     3 |      3 |  55 | e21217a2a4ebd131 |    1 |
| 21 | 0x5400 |       38 |         1 |     3 |      3 |  25 | 02529122593f24e3 |    1 |
| 23 | 0x5c00 |       28 |         1 |     3 |      3 |  26 | 72263fe00cf470b0 |    1 |
| 27 | 0x6c00 |       38 |         1 |     2 |      2 |  26 | 429cb9ef5cf19f0d |    1 |
| 28 | 0x7000 |       38 |         1 |     3 |      3 |  16 | 56db062927ff33b2 |    1 |
| 30 | 0x7800 |       28 |         1 |     3 |      3 |  11 | 82d41cb0d3fabfc2 |    1 |
| 38 | 0x9800 |       28 |         1 |     3 |      3 |  24 | 8696709b7db12cb9 |    1 |
| 46 | 0xb800 |       38 |         1 |     3 |      3 |  12 | 4eaad145844a8ff2 |    1 |
| 54 | 0xd800 |       63 |         0 |     0 |      0 |   0 | 060709fdda73ea45 |    0 |

[jwhui]

Next Hop represents the best path when routing through a neighboring router.

When forwarding a packet, the router will consider both a direct link and other through another router. In this case, the routing table shows a direct link to 0x1800 and will use that when forwarding the packet.

Having both options provides greater robustness to link failures.

[sohaibbinaltaf]

If you could please tell me which command can be used to get this routing table?

[abtink]

router table

You check the src/cli/README.md for all CLI commands
(also documentation for the CLI is being added in https://openthread.io/reference/cli/commands).