mirror of
https://github.com/gnu4cn/ccna60d.git
synced 2024-05-21 04:55:00 +08:00
Updated 'src/network_troubleshooting.md'.
This commit is contained in:
parent
1f22084103
commit
8729a3b95e
@ -74,3 +74,32 @@ Ten-GigabitEthernet1/0/52 transceiver current alarm information:
|
||||
RX power low
|
||||
RX signal loss
|
||||
```
|
||||
|
||||
|
||||
## H3C IPv6 DHCP snooping 设置
|
||||
|
||||
此问题源起 [Windows DNS 解析异常的一种情况](https://snippets.xfoss.com/36_Win_SysAdmin.html#windows-dns-%E8%A7%A3%E6%9E%90%E5%BC%82%E5%B8%B8%E7%9A%84%E4%B8%80%E7%A7%8D%E6%83%85%E5%86%B5),排查发现在防火墙(FortiGate 60E)上已经禁用 IPv6,故分析主机获取到的局域网IPv6地址,是从交换机上得到。但继续排查发现核心交换机同样没有启用 IPv6 栈,那么就可能是网络上有具备 IPv6 DHCP 功能的设备,给主机了局域网的 IPv6 地址,以及 IPv6 DNS 服务器。
|
||||
|
||||
尝试在核心交换机上开启 IPv6 DHCP snooping 功能:
|
||||
|
||||
|
||||
```console
|
||||
ipv6 dhcp snooping enable
|
||||
```
|
||||
|
||||
|
||||
并在接入接口上,开启 IPv6 DHCP snooping 功能,已消除上述设备 IPv6 DHCP 功能的影响:
|
||||
|
||||
|
||||
```console
|
||||
interface GigabitEthernet1/0/1
|
||||
port link-mode bridge
|
||||
port access vlan 10
|
||||
ipv6 dhcp snooping deny
|
||||
```
|
||||
|
||||
|
||||
随后发现,终端主机已经没有获取到 IPv6 DNS server 了。Windows DNS 解析异常问题解除。
|
||||
|
||||
|
||||
*注*:H3C 交换机建立端口组的命令为:`interface range name acc`,其中 `acc` 为端口组的名字,命令后跟要加入该端口组的接口。
|
||||
|
Loading…
Reference in New Issue
Block a user