---
title: Lab Meeting Minutes 2020/12/22
tags: lab_meeting
---
>Outline
>[TOC]
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# PERAL Lab Meeting
- 時間：109年12月22日14：00
- 地點：暨南大學科三館321教室
- 出席者：吳坤熹老師、謝萬霖、陳嘉瑋、劉怡君、田蕙瑜、劉又聖
- 會議主題： [DHCP](http://ms15.voip.edu.tw/~jiawei/home/meeting/DHCP/DHCP.pptx)
- 主講者: 陳嘉瑋
- 主記: 田蕙瑜

## 會議內容
- 提供的服務:
用於內部網路或網路服務供應商自動分配IP位址給使用者

- DHCP Progress:
1. Discover
2. Offer
3. Request
4. Acknowledge

#### 建議&問題

1. Advice:
Sais **IP address**, instead of "IP". Internet Protocol[name= Solomon]

2. Which protocol(?) does DHCP send packet? In IP layer, UDP or TCP?[name=Solomon]
Ans:
Jeffery mentioned the client and server has port. That is DHCP are send msg in transger layer.
Besides, only UDP has broadcast. Consequently, DHCP send msg by UDP.[name=Solomon]

3. Netmask(?) [name=Solomon]
*Does anyone can give detail about this question?*

4. p.6 In picture, is the first msg named DISCOVERY or DISCOVER? [name= Solomon]
In RFC213 page 15th, the 1st msg is named "DHCPDISCOVER" [name=Edger]

5. DHCP過程四步驟是否皆為broadcast?[name= Edger]

6. In PPT(unknoen page) described DHCP NAK:伺服器回覆客戶，客戶要求的網址不能被分配, 請問網址是指URL or IP addr?[name= Johnson]
Ans: URL[name= Jeffery]

7. In the same subnet, does the msg DHCPDECLINE be send or not? How about in the diffrent subnet?

8. Advice:
DO NOT give a presentation only using others' data.[name= Solomon]

9. In the 2nd lab, why Server 2 can be in charge while Main Server stop service? [name= Phoebe]

10.
- If there are 100 computers need IP addrs, how can we arrange IP addrs to Main Server and Swerver2?
Ans:
<table>
<tr>
<td> </td>
<td>student</td>
<td>teacher</td>
</tr>

<tr>
<td>Main Server</td>
<td>192.168.0.1~192.168.0.254</td>
<td>192.168.1.1~192.168.1.254</td>
</tr>

<tr>
<td>Server2</td>
<td>192.168.2.1~192.168.2.254</td>
<td>192.168.3.1~192.168.3.254</td>
</tr>
</table>

| | Server1 | Server2 |
| -------- | -------- | -------- |
| Text | Text | Text |

- How about router netmask /23, why?

11. p.7 DHCPNAK or DPCPNACK? [name= Johnson]
Ans:
DHCPNAK in RFC2131(Dynamic Host Configuration Protocol)
BUt, DNCPNACK in IP Doc.[name= Solomon]

12. Advice:
若修正成本相同，何不大膽多修點[name= Solomon]

13. Adivce:
同一份文件名詞請統一[name= Solomon]

14. 在下ip helper-address的指令時，有可以設定DHCP server priority 的參數嗎? [name=Phoebe]
Ans: 所謂的備援機制，多台DHCP server的地位相等。

15. How to check Lease Obtained & Lease Expires? [name= Solomon]
Ans:
In Windows CMD, type "ipconfig /all" [name= Solomon]

16. What if I only have a poll of IP address which is /24, and the scenario is still a 200-user network. How can I config the DHCP servers to backup each other? [name= Edgar]

---
### Jeffery's Topo Structure

#### Adviced Solution
1. NAT
2. Use Proxy to request

##### Term:
- NAPT

#### Quesiton
- How about IPv6?
- 使用何種效能量測工具?
---
網路卡會有MAC ADDRESS
## 臨時動議&待追蹤事項
1. 定期更新meeting regulation
2. 下周怡君先報告效能 @61G
- 問怡君，can container 是不適可以修改mac addr.

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散會結束時間: 17:02