lldp
https://serverfault.com/questions/465472/what-is-lldpad-rhel
lldpd 和 lldpad 啥关系
nixos 上
# 使用方法 : sudo lldpcli show neighbor
services.lldpd.enable = true;
x86 fedora 上:
sudo yum install lldpd
sudo lldpcli show neighbor
sudo systemctl restart lldpd
但是可以找到 lldpad ，不知道两者的关系是什么: https://manpages.ubuntu.com/manpages/bionic/man8/lldpad.8.html
测试结果
在 13900k 上测试:
🤒 sudo lldpcli show neighbor
-------------------------------------------------------------------------------
LLDP neighbors:
-------------------------------------------------------------------------------
Interface: enp5s0, via: LLDP, RID: 1, Time: 0 day, 00:04:41
Chassis:
ChassisID: mac 00:e0:4c:68:0c:0c
SysName: nixos
SysDescr: NixOS 24.05 (Uakari) Linux 6.9.7 #1-NixOS SMP PREEMPT_DYNAMIC Thu Jun 27 11:52:32 UTC 2024 x86_64
MgmtIP: 192.168.11.3
MgmtIface: 4
MgmtIP: fd7a:115c:a1e0:ab12:4843:cd96:625d:6902
MgmtIface: 7
Capability: Bridge, on
Capability: Router, on
Capability: Wlan, on
Capability: Station, off
Port:
PortID: mac a0:36:bc:ad:c2:ce
PortDescr: enp6s0
TTL: 120
-------------------------------------------------------------------------------
Interface: enp6s0, via: LLDP, RID: 1, Time: 0 day, 00:04:41
Chassis:
ChassisID: mac 00:e0:4c:68:0c:0c
SysName: nixos
SysDescr: NixOS 24.05 (Uakari) Linux 6.9.7 #1-NixOS SMP PREEMPT_DYNAMIC Thu Jun 27 11:52:32 UTC 2024 x86_64
MgmtIP: 192.168.11.3
MgmtIface: 4
MgmtIP: fd7a:115c:a1e0:ab12:4843:cd96:625d:6902
MgmtIface: 7
Capability: Bridge, on
Capability: Router, on
Capability: Wlan, on
Capability: Station, off
Port:
PortID: mac 00:e0:4c:68:0c:0c
PortDescr: enp5s0
TTL: 120
-------------------------------------------------------------------------------
Interface: vif55.2, via: LLDP, RID: 2, Time: 0 day, 00:04:40
Chassis:
ChassisID: mac 52:54:00:12:34:56
SysName: localhost
SysDescr: CentOS Linux 7 (Core) Linux 5.10.0.x86_64 #1 SMP Sun Jun 16 06:23:27 UTC 2024 x86_64
MgmtIP: 10.0.55.0
MgmtIface: 3
MgmtIP: fec0::5054:ff:fe12:3456
MgmtIface: 2
Capability: Bridge, on
Capability: Router, on
Capability: Wlan, off
Capability: Station, off
Port:
PortID: mac 52:54:00:00:02:37
PortDescr: eth1
TTL: 120
-------------------------------------------------------------------------------
Interface: vif55.3, via: LLDP, RID: 2, Time: 0 day, 00:04:40
Chassis:
ChassisID: mac 52:54:00:12:34:56
SysName: localhost
SysDescr: CentOS Linux 7 (Core) Linux 5.10.0.x86_64 #1 SMP Sun Jun 16 06:23:27 UTC 2024 x86_64
MgmtIP: 10.0.55.0
MgmtIface: 3
MgmtIP: fec0::5054:ff:fe12:3456
MgmtIface: 2
Capability: Bridge, on
Capability: Router, on
Capability: Wlan, off
Capability: Station, off
Port:
PortID: mac 52:54:00:00:03:37
PortDescr: eth2
TTL: 120
-------------------------------------------------------------------------------
在 m1 mac 上执行:
🧀 sudo lldpcli show neighbor
-------------------------------------------------------------------------------
LLDP neighbors:
-------------------------------------------------------------------------------
Interface: enu1c2, via: LLDP, RID: 1, Time: 0 day, 00:00:21
Chassis:
ChassisID: mac 00:e0:4c:68:0c:0c
SysName: nixos
SysDescr: NixOS 24.05 (Uakari) Linux 6.9.7 #1-NixOS SMP PREEMPT_DYNAMIC Thu Jun 27 11:52:32 UTC 2024 x86_64
MgmtIP: 192.168.11.3
MgmtIface: 4
MgmtIP: fd7a:115c:a1e0:ab12:4843:cd96:625d:6902
MgmtIface: 7
Capability: Bridge, on
Capability: Router, on
Capability: Wlan, on
Capability: Station, off
Port:
PortID: mac a0:36:bc:ad:c2:ce
PortDescr: enp6s0
TTL: 120
-------------------------------------------------------------------------------
Interface: enu1c2, via: LLDP, RID: 1, Time: 0 day, 00:00:21
Chassis:
ChassisID: mac 00:e0:4c:68:0c:0c
SysName: nixos
SysDescr: NixOS 24.05 (Uakari) Linux 6.9.7 #1-NixOS SMP PREEMPT_DYNAMIC Thu Jun 27 11:52:32 UTC 2024 x86_64
MgmtIP: 192.168.11.3
MgmtIface: 4
MgmtIP: fd7a:115c:a1e0:ab12:4843:cd96:625d:6902
MgmtIface: 7
Capability: Bridge, on
Capability: Router, on
Capability: Wlan, on
Capability: Station, off
Port:
PortID: mac 00:e0:4c:68:0c:0c
PortDescr: enp5s0
TTL: 120
13900k 中的虚拟机:
martins3@bogon:~$ sudo lldpcli show neighbor
-------------------------------------------------------------------------------
LLDP neighbors:
-------------------------------------------------------------------------------
Interface: ens5, via: LLDP, RID: 1, Time: 0 day, 00:04:30
Chassis:
ChassisID: mac 00:e0:4c:68:0c:0c
SysName: nixos
SysDescr: NixOS 24.05 (Uakari) Linux 6.9.7 #1-NixOS SMP PREEMPT_DYNAMIC Thu Jun 27 11:52:32 UTC 2024 x86_64
MgmtIP: 10.11.0.1
MgmtIface: 8
MgmtIP: fd7a:115c:a1e0:ab12:4843:cd96:625d:6902
MgmtIface: 7
Capability: Bridge, on
Capability: Router, on
Capability: Wlan, on
Capability: Station, off
Port:
PortID: mac d2:2d:d0:90:43:33
PortDescr: vif67.2
TTL: 120
-------------------------------------------------------------------------------
Interface: ens6, via: LLDP, RID: 1, Time: 0 day, 00:04:30
Chassis:
ChassisID: mac 00:e0:4c:68:0c:0c
SysName: nixos
SysDescr: NixOS 24.05 (Uakari) Linux 6.9.7 #1-NixOS SMP PREEMPT_DYNAMIC Thu Jun 27 11:52:32 UTC 2024 x86_64
MgmtIP: 10.11.0.1
MgmtIface: 8
MgmtIP: fd7a:115c:a1e0:ab12:4843:cd96:625d:6902
MgmtIface: 7
Capability: Bridge, on
Capability: Router, on
Capability: Wlan, on
Capability: Station, off
Port:
PortID: mac 26:bb:f9:8d:fb:60
PortDescr: vif67.3
TTL: 120
-------------------------------------------------------------------------------
注意，这里的 ens5 正好对应的是 host 中的 vif67.3
所以，lldp show neighbor 的工作看似就是那些线连到一起了。
问题
在 kernel 中找 lldp 的信息，可以发现很多在具体驱动中的 lldp 内容，但是 mlx 和 virtio_net 中完全没有。
这个是可以同时实现在内核态和用户态的都可以吗?
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