组网需求
说明
S5720I-10X-PWH-SI-AC 和 S5720I-6X-PWH-SI-AC 不支持此配置。
如 图 3-23 所示，为了增加设备的容量采用设备堆叠技术，将 Switch3 和 Switch4通过专用的堆叠电缆链接起来，对外呈现为一台逻辑交换机。为了实现设备间的备份、提高可靠性，采用跨堆叠设备Eth-Trunk接口技术，将不同设备上的物理接口加入同一个Eth-Trunk接口。在网络无任何故障情况下，在PE设备上查看成员口信息时，发现VLAN2的数据流量会通过成员口GE1/0/1和GE1/0/2转发，VLAN3的数据流量通过成员口GE1/0/1和GE1/0/2转发。增加了堆叠设备之间的带宽承载能力，也降低了流量转发效率。为了有效保证VLAN2的数据流量通过成员口GE1/0/1转发，VLAN3的数据流量通过成员口GE1/0/2转发，可在堆叠设备上使能Eth-Trunk接口流量本地优先转发功能。
配置思路
采用如下的思路配置 Eth-Trunk 接口流量本地优先转发功能：
- 创建 Eth-Trunk 接口。
- 加入 Eth-Trunk 的成员接口。
- 使能 Eth-Trunk 接口流量本地优先转发功能。
- 配置各接口加入相应 VLAN ，实现二层互通。
操作步骤
步骤 1 创建 Eth-Trunk 接口，并配置允许通过的 VLAN
配置 Stack 。
<HUAWEI> system-view
HUAWEI sysname Stack
Stack interface eth-trunk 10
Stack-Eth-Trunk10 port link-type trunk
Stack-Eth-Trunk10 port trunk allow-pass vlan all
Stack-Eth-Trunk10 undo port trunk allow-pass vlan 1
Stack-Eth-Trunk10 quit
配置 PE 。
<HUAWEI> system-view
HUAWEI sysname PE
PE interface eth-trunk 10
PE-Eth-Trunk10 port link-type trunk
PE-Eth-Trunk10 port trunk allow-pass vlan all
PE-Eth-Trunk10 undo port trunk allow-pass vlan 1
PE-Eth-Trunk10 quit
步骤 2 加入 Eth-Trunk 的成员接口
配置 Stack 。
Stack interface gigabitethernet 1/0/4
Stack-GigabitEthernet1/0/4 eth-trunk 10
Stack-GigabitEthernet1/0/4 quit
Stack interface gigabitethernet 2/0/4
Stack-GigabitEthernet2/0/4 eth-trunk 10
Stack-GigabitEthernet2/0/4 quit
配置 PE 。
PE interface gigabitethernet 1/0/1
PE-GigabitEthernet1/0/1 eth-trunk 10
PE-GigabitEthernet1/0/1 quit
PE interface gigabitethernet 1/0/2
PE-GigabitEthernet1/0/2 eth-trunk 10
PE-GigabitEthernet1/0/2 quit
步骤 3 在堆叠设备上使能 Eth-Trunk 接口流量本地优先转发功能
对于 S2730S-S 、 S5735-L-I 、 S5735-L1 、 S300 、 S5735-L 、 CloudEngine S5735S-L1 、
S5735S-L 、 S5735-S 、 S5735S-S 、 S5735S-L-M 、 S500 ：
Stack local-preference enable
对于除 S2730S-S 、 S5735-L-I 、 S5735-L1 、 S300 、 S5735-L 、 CloudEngine S5735S
L1 、 S5735S-L 、 S5735-S 、 S5735S-S 、 S5735S-L-M 、 S500 之外的设备：
Stack interface eth-trunk 10
Stack-Eth-Trunk10 local-preference enable
Stack-Eth-Trunk10 quit
步骤 4 配置二层转发功能
配置 Stack 。
Stack vlan batch 2 3
Stack interface gigabitethernet 1/0/3
Stack-GigabitEthernet1/0/3 port link-type trunk
Stack-GigabitEthernet1/0/3 port trunk allow-pass vlan 2
Stack-GigabitEthernet1/0/3 undo port trunk allow-pass vlan 1
Stack-GigabitEthernet1/0/3 quit
Stack interface gigabitethernet 2/0/3
Stack-GigabitEthernet2/0/3 port link-type trunk
Stack-GigabitEthernet2/0/3 port trunk allow-pass vlan 3
Stack-GigabitEthernet2/0/3 undo port trunk allow-pass vlan 1
Stack-GigabitEthernet2/0/3 quit
配置 Switch1 。
<HUAWEI> system-view
HUAWEI sysname Switch1
Switch1 vlan 2
Switch1-vlan2 quit
Switch1 interface gigabitethernet 0/0/1
Switch1-GigabitEthernet0/0/1 port link-type trunk
Switch1-GigabitEthernet0/0/1 port trunk allow-pass vlan 2
Switch1-GigabitEthernet0/0/1 undo port trunk allow-pass vlan 1
Switch1-GigabitEthernet0/0/1 quit
Switch1 interface gigabitethernet 0/0/2
Switch1-GigabitEthernet0/0/2 port link-type trunk
Switch1-GigabitEthernet0/0/2 port trunk allow-pass vlan 2
Switch1-GigabitEthernet0/0/2 undo port trunk allow-pass vlan 1
Switch1-GigabitEthernet0/0/2 quit
配置 Switch2 。
<HUAWEI> system-view
HUAWEI sysname Switch2
Switch2 vlan 3
Switch2-vlan3 quit
Switch2 interface gigabitethernet 0/0/1
Switch2-GigabitEthernet0/0/1 port link-type trunk
Switch2-GigabitEthernet0/0/1 port trunk allow-pass vlan 3
Switch2-GigabitEthernet0/0/1 undo port trunk allow-pass vlan 1
Switch2-GigabitEthernet0/0/1 quit
Switch2 interface gigabitethernet 0/0/2
Switch2-GigabitEthernet0/0/2 port link-type trunk
Switch2-GigabitEthernet0/0/2 port trunk allow-pass vlan 3
Switch2-GigabitEthernet0/0/2 undo port trunk allow-pass vlan 1
Switch2-GigabitEthernet0/0/2 quit
步骤 5检查配置结果
上述配置成功后，在任意视图下执行命令 display trunkmembership eth-trunk ，可
以看到 Eth-Trunk 接口的成员口信息。例如：
以 Stack 的显示为例。
<Stack> display trunkmembership eth-trunk 10
Trunk ID: 10
Used status: VALID
TYPE: ethernet
Working Mode : Normal
Number Of Ports in Trunk = 2
Number Of Up Ports in Trunk = 2
Operate status: up
Interface GigabitEthernet1/0/4, valid, operate up, weight=1
Interface GigabitEthernet2/0/4, valid, operate up, weight=1
---- 结束
配置文件
● Stack 的配置文件
sysname Stack
vlan batch 2 3
interface Eth-Trunk10
port link-type trunk
undo port trunk allow-pass vlan 1
port trunk allow-pass vlan 2 to 4094
interface GigabitEthernet1/0/3
port link-type trunk
undo port trunk allow-pass vlan 1
port trunk allow-pass vlan 2
interface GigabitEthernet2/0/3
port link-type trunk
undo port trunk allow-pass vlan 1
port trunk allow-pass vlan 3
interface GigabitEthernet1/0/4
eth-trunk 10
interface GigabitEthernet2/0/4
eth-trunk 10
return
● PE 的配置文件
sysname PE
interface Eth-Trunk10
port link-type trunk
undo port trunk allow-pass vlan 1
port trunk allow-pass vlan 2 to 4094
interface GigabitEthernet1/0/1
eth-trunk 10
interface GigabitEthernet1/0/2
eth-trunk 10
return
● Switch1 的配置文件
sysname Switch1
vlan batch 2
interface GigabitEthernet0/0/1
port link-type trunk
undo port trunk allow-pass vlan 1
port trunk allow-pass vlan 2
interface GigabitEthernet0/0/2
port link-type trunk
undo port trunk allow-pass vlan 1
port trunk allow-pass vlan 2
return
● Switch2 的配置文件
sysname Switch2
vlan batch 3
interface GigabitEthernet0/0/1
port link-type trunk
undo port trunk allow-pass vlan 1
port trunk allow-pass vlan 3
interface GigabitEthernet0/0/2
port link-type trunk
undo port trunk allow-pass vlan 1
port trunk allow-pass vlan 3
return