VMware Player 17中Ubuntu 22.04.2虚拟机DHCP无法获取IP的调试求助

大家好，我遇到个棘手的问题：在Windows 11上用VMware Player 17运行Ubuntu 22.04.2虚拟机，静态IP配置一切正常，但DHCP模式下完全拿不到地址——虚拟机发了请求，却没有任何响应回来。

我已经做了这些排查操作，想请大家帮忙看看该怎么继续调试：

1. 手动触发DHCP请求 #

执行sudo dhclient -v手动请求DHCP，结果只反复发送DHCPDISCOVER包，始终没收到回应，只能手动终止：

mat@devbox:~$ sudo dhclient -v

Internet Systems Consortium DHCP Client 4.4.1

Copyright 2004-2018 Internet Systems Consortium.

All rights reserved.

Listening on LPF/ens33/00:0c:29:9a:27:bb

Sending on   LPF/ens33/00:0c:29:9a:27:bb

Sending on   Socket/fallback

DHCPDISCOVER on ens33 to 255.255.255.255 port 67 interval 3 (xid=0xe24e363f)

DHCPDISCOVER on ens33 to 255.255.255.255 port 67 interval 3 (xid=0xe24e363f)

^C

2. 虚拟机内抓包验证 #

用tcpdump抓取DHCP相关流量，能看到虚拟机发出了DHCP Discover请求，但完全没有收到返回的包：

mat@devbox:~$ sudo tcpdump -i ens33 port 67 or port 68 -e -n -vv

tcpdump: listening on ens33, link-type EN10MB (Ethernet), snapshot length 262144 bytes

11:38:23.059861 00:0c:29:9a:27:bb > ff:ff:ff:ff:ff:ff, ethertype IPv4 (0x0800), length 342: (tos 0x10, ttl 128, id 0, offset 0, flags [none], proto UDP (17), length 328)

0.0.0.0.68 > 255.255.255.255.67: [udp sum ok] BOOTP/DHCP, Request from 00:0c:29:9a:27:bb, length 300, xid 0x77a96118, Flags [none] (0x0000)

Client-Ethernet-Address 00:0c:29:9a:27:bb

Vendor-rfc1048 Extensions

Magic Cookie 0x63825363

DHCP-Message (53), length 1: Discover

Hostname (12), length 6: "devbox"

Parameter-Request (55), length 13:

Subnet-Mask (1), BR (28), Time-Zone (2), Default-Gateway (3)

Domain-Name (15), Domain-Name-Server (6), Unknown (119), Hostname (12)

Netbios-Name-Server (44), Netbios-Scope (47), MTU (26), Classless-Static-Route (121)

NTP (42)

3. 主机端抓包对比 #

在Windows主机上用Wireshark抓包，发现虚拟机的DHCP请求根本没被主机接收到；但我开启另一台物理主机时，Wireshark能正常看到它完整的DHCP交互流程：

No. Time Source Destination Protocol Length Info
139 9.071516 0.0.0.0 255.255.255.255 DHCP 342 DHCP Discover - Transaction ID 0x77a96118
140 9.071526 0.0.0.0 255.255.255.255 DHCP 342 DHCP Discover - Transaction ID 0x77a96118
...
12202 369.907494 0.0.0.0 255.255.255.255 DHCP 344 DHCP Discover - Transaction ID 0x3a951626
12233 370.931839 192.168.1.1 255.255.255.255 DHCP 342 DHCP Offer - Transaction ID 0x3a951626
12236 371.034456 0.0.0.0 255.255.255.255 DHCP 370 DHCP Request - Transaction ID 0x3a951626
12237 371.034456 192.168.1.1 255.255.255.255 DHCP 342 DHCP ACK - Transaction ID 0x3a951626

4. DHCP服务器日志验证 #

我的OPNsense DHCP服务器日志显示，它已经向虚拟机的MAC地址发送了DHCPOFFER：

2023-04-16T11:38:24 dhcpd[68501] DHCPOFFER on 192.168.1.25 to 00:0c:29:9a:27:bb (devbox) via vtnet3_vlan101
2023-04-16T11:38:23 dhcpd[68501] DHCPDISCOVER from 00:0c:29:9a:27:bb via vtnet3_vlan101

现在我有点摸不着头脑，明明服务器已经发了响应，但数据包好像在某个环节丢失了，请问我该怎么进一步调试这个问题呢？

备注：内容来源于stack exchange，提问作者Mat