DocomoHome5G & SoftbankAir 単純比較

# 製品情報
詳細は下記公式HPを参照されたし。

https://www.nttdocomo.co.jp/home_5g/router/

https://www.softbank.jp/ybb/special/air/

# 先に結論
Softbank回線のほうがいいんじゃね・・・？

# 試験した日
めちゃくちゃ暑かった。溶ける... (↓↓↓switchbotで室温湿度測定↓↓↓)
![image.png](https://qiita-image-store.s3.ap-northeast-1.amazonaws.com/0/104374/f04fd7d4-ba15-365e-8d73-93a0ecbc782d.png)


# Ping 実施してみた
Docomo側, SB側ともに 下記条件にて Ping を実施した

|||
|-|-|
|宛先|8.8.8.8(google.dns)|
| 回数 | 10 x 10 回 | 
| MTU | 1422 |
| [dfBit](https://atmarkit.itmedia.co.jp/ait/articles/0512/17/news017.html#:~:text=フラグメンテーション) | On |
|送信元デバイス|Cisco 891FJ (有線LAN(Gi8)接続)|

https://atmarkit.itmedia.co.jp/aig/06network/mtu.html

https://atmarkit.itmedia.co.jp/icd/root/55/5798855.html

## MTU = 1422 とした理由
SB側でdf-bit有効化した状態でPing疎通可能な値が1422だったため。なぜかはしらん。

## ping home_5g to 8.8.8.8
```text:docomo
891_docomo#ping 8.8.8.8 repeat 10 size 1422 df-bit
Type escape sequence to abort.
Sending 10, 1422-byte ICMP Echos to 8.8.8.8, timeout is 2 seconds:
Packet sent with the DF bit set
!!!!!!!!!!
Success rate is 100 percent (10/10), round-trip min/avg/max = 40/52/64 ms
891_docomo#ping 8.8.8.8 repeat 10 size 1422 df-bit
Type escape sequence to abort.
Sending 10, 1422-byte ICMP Echos to 8.8.8.8, timeout is 2 seconds:
Packet sent with the DF bit set
!!!!!!!!!!
Success rate is 100 percent (10/10), round-trip min/avg/max = 48/56/68 ms
891_docomo#ping 8.8.8.8 repeat 10 size 1422 df-bit
Type escape sequence to abort.
Sending 10, 1422-byte ICMP Echos to 8.8.8.8, timeout is 2 seconds:
Packet sent with the DF bit set
!!!!!!!!!!
Success rate is 100 percent (10/10), round-trip min/avg/max = 36/88/440 ms
891_docomo#ping 8.8.8.8 repeat 10 size 1422 df-bit
Type escape sequence to abort.
Sending 10, 1422-byte ICMP Echos to 8.8.8.8, timeout is 2 seconds:
Packet sent with the DF bit set
!!!!!!!!!!
Success rate is 100 percent (10/10), round-trip min/avg/max = 40/46/68 ms
891_docomo#ping 8.8.8.8 repeat 10 size 1422 df-bit
Type escape sequence to abort.
Sending 10, 1422-byte ICMP Echos to 8.8.8.8, timeout is 2 seconds:
Packet sent with the DF bit set
!!!!!!!!!!
Success rate is 100 percent (10/10), round-trip min/avg/max = 40/50/64 ms
891_docomo#ping 8.8.8.8 repeat 10 size 1422 df-bit
Type escape sequence to abort.
Sending 10, 1422-byte ICMP Echos to 8.8.8.8, timeout is 2 seconds:
Packet sent with the DF bit set
!!!!!!!!!.
Success rate is 90 percent (9/10), round-trip min/avg/max = 40/52/64 ms
891_docomo#ping 8.8.8.8 repeat 10 size 1422 df-bit
Type escape sequence to abort.
Sending 10, 1422-byte ICMP Echos to 8.8.8.8, timeout is 2 seconds:
Packet sent with the DF bit set
!!!!!!!!!!
Success rate is 100 percent (10/10), round-trip min/avg/max = 40/40/48 ms
891_docomo#ping 8.8.8.8 repeat 10 size 1422 df-bit
Type escape sequence to abort.
Sending 10, 1422-byte ICMP Echos to 8.8.8.8, timeout is 2 seconds:
Packet sent with the DF bit set
!!!!!!!!!!
Success rate is 100 percent (10/10), round-trip min/avg/max = 48/60/76 ms
891_docomo#ping 8.8.8.8 repeat 10 size 1422 df-bit
Type escape sequence to abort.
Sending 10, 1422-byte ICMP Echos to 8.8.8.8, timeout is 2 seconds:
Packet sent with the DF bit set
!!!!!!!!!!
Success rate is 100 percent (10/10), round-trip min/avg/max = 40/51/68 ms
891_docomo#ping 8.8.8.8 repeat 10 size 1422 df-bit
Type escape sequence to abort.
Sending 10, 1422-byte ICMP Echos to 8.8.8.8, timeout is 2 seconds:
Packet sent with the DF bit set
!!!!!!!!!!
Success rate is 100 percent (10/10), round-trip min/avg/max = 36/40/52 ms
891_docomo#
```

## ping sb_air to 8.8.8.8
```text:softbank
891_softbank#ping 8.8.8.8 repeat 10 size 1422 df-bit
Type escape sequence to abort.
Sending 10, 1422-byte ICMP Echos to 8.8.8.8, timeout is 2 seconds:
Packet sent with the DF bit set
!!!!!!!!!!
Success rate is 100 percent (10/10), round-trip min/avg/max = 28/30/36 ms
891_softbank#ping 8.8.8.8 repeat 10 size 1422 df-bit
Type escape sequence to abort.
Sending 10, 1422-byte ICMP Echos to 8.8.8.8, timeout is 2 seconds:
Packet sent with the DF bit set
!!!!!!!!!!
Success rate is 100 percent (10/10), round-trip min/avg/max = 28/33/52 ms
891_softbank#ping 8.8.8.8 repeat 10 size 1422 df-bit
Type escape sequence to abort.
Sending 10, 1422-byte ICMP Echos to 8.8.8.8, timeout is 2 seconds:
Packet sent with the DF bit set
!!!!!!!!!!
Success rate is 100 percent (10/10), round-trip min/avg/max = 28/31/44 ms
891_softbank#ping 8.8.8.8 repeat 10 size 1422 df-bit
Type escape sequence to abort.
Sending 10, 1422-byte ICMP Echos to 8.8.8.8, timeout is 2 seconds:
Packet sent with the DF bit set
!!!!!!!!!!
Success rate is 100 percent (10/10), round-trip min/avg/max = 24/33/44 ms
891_softbank#ping 8.8.8.8 repeat 10 size 1422 df-bit
Type escape sequence to abort.
Sending 10, 1422-byte ICMP Echos to 8.8.8.8, timeout is 2 seconds:
Packet sent with the DF bit set
!!!!!!!!!!
Success rate is 100 percent (10/10), round-trip min/avg/max = 28/33/48 ms
891_softbank#ping 8.8.8.8 repeat 10 size 1422 df-bit
Type escape sequence to abort.
Sending 10, 1422-byte ICMP Echos to 8.8.8.8, timeout is 2 seconds:
Packet sent with the DF bit set
!!!!!!!!!!
Success rate is 100 percent (10/10), round-trip min/avg/max = 28/32/44 ms
891_softbank#ping 8.8.8.8 repeat 10 size 1422 df-bit
Type escape sequence to abort.
Sending 10, 1422-byte ICMP Echos to 8.8.8.8, timeout is 2 seconds:
Packet sent with the DF bit set
!!!!!!!!!!
Success rate is 100 percent (10/10), round-trip min/avg/max = 28/31/44 ms
891_softbank#ping 8.8.8.8 repeat 10 size 1422 df-bit
Type escape sequence to abort.
Sending 10, 1422-byte ICMP Echos to 8.8.8.8, timeout is 2 seconds:
Packet sent with the DF bit set
!!!!!!!!!!
Success rate is 100 percent (10/10), round-trip min/avg/max = 28/32/40 ms
891_softbank#ping 8.8.8.8 repeat 10 size 1422 df-bit
Type escape sequence to abort.
Sending 10, 1422-byte ICMP Echos to 8.8.8.8, timeout is 2 seconds:
Packet sent with the DF bit set
!!!!!!!!!!
Success rate is 100 percent (10/10), round-trip min/avg/max = 28/31/44 ms
891_softbank#ping 8.8.8.8 repeat 10 size 1422 df-bit
Type escape sequence to abort.
Sending 10, 1422-byte ICMP Echos to 8.8.8.8, timeout is 2 seconds:
Packet sent with the DF bit set
!!!!!!!!!!
Success rate is 100 percent (10/10), round-trip min/avg/max = 28/32/44 ms
891_softbank#
```

## summary(RTT)
単位: ms
(min/avg/max)

| # | docomo | softbank |
|-|-|-|
|  1 | 40/52/64  | 28/30/36 |
|  2 | 48/56/68  | 28/33/52 |
|  3 | 36/88/440 | 28/31/44 |
|  4 | 40/46/68  | 24/33/44 |
|  5 | 40/50/64  | 28/33/48 |
|  6 | 40/52/64  | 28/32/44 |
|  7 | 40/40/48  | 28/31/44 |
|  8 | 48/60/76  | 28/32/40 |
|  9 | 40/51/68  | 28/31/44 |
| 10 | 36/40/52  | 28/32/44 |

契約した初日だからだろうか。SBのほうがいい気がする...( ๑╹⌓╹ )