路由器可以对多个以太网接口捆绑形成一个Eth-Trunk逻辑接口，Eth-Trunk接口的主要目的是增大带宽和提高设备之间链路的可靠性。Eth-Trunk接口可以工作在二层模式或三层模式。二层模式的Eth-Trunk接口类似交互机的接口，只负责二层数据包的转发；三层模式的Eth-Trunk接口则类似路由器的接口，可以配上IP地址实现路由功能。本文为大家介绍如何在华为的路由器里配置二层和三层Eth-Trunk接口。
一、二层Eth-Trunk接口配置实例
1、组网结构和需求
如下图所示，RouterA和RouterB之间通过Eth-Trunk1连接，Eth-Trunk1是二层端口。将Eth-Trunk1配置为Trunk类型接口，允许RouterA和RouterB之间的所有VLAN帧通过。
2、配置思路
采用如下的思路配置二层Eth-Trunk端口允许VLAN通过：
1）创建Eth-Trunk接口。
2）将Eth-Trunk接口转为二层端口。
3）将Eth-Trunk端口配置为Trunk类型的端口，并允许所有VLAN帧通过。
4）将成员口接入Eth-Trunk端口中。
3、配置步骤
1）配置RouterA
# 创建Eth-Trunk接口，并配置允许通过的VLAN。
[RouterA] interface eth-trunk 1
[RouterA-Eth-Trunk1] portswitch
[RouterA-Eth-Trunk1] port link-type trunk
[RouterA-Eth-Trunk1] port trunk allow-pass vlan all
[RouterA-Eth-Trunk1] quit
# 将接口GE1/0/0、GE2/0/0加入到Eth-Trunk 1中。
[RouterA] interface gigabitethernet 1/0/0
[RouterA-GigabitEthernet1/0/0] undo shutdown
[RouterA-GigabitEthernet1/0/0] eth-trunk 1
[RouterA-GigabitEthernet1/0/0] quit
[RouterA] interface gigabitethernet 2/0/0
[RouterA-GigabitEthernet2/0/0] undo shutdown
[RouterA-GigabitEthernet2/0/0] eth-trunk 1
[RouterA-GigabitEthernet2/0/0] quit
2）配置RouterB
# 创建Eth-Trunk接口，并配置允许通过的VLAN。
[RouterB] interface eth-trunk 1
[RouterB-Eth-Trunk1] portswitch
[RouterB-Eth-Trunk1] port link-type trunk
[RouterB-Eth-Trunk1] port trunk allow-pass vlan all
[RouterB-Eth-Trunk1] quit
# 将接口GE1/0/0、GE2/0/0加入到Eth-Trunk 1中。
[RouterB] interface gigabitethernet 1/0/0
[RouterB-GigabitEthernet1/0/0] undo shutdown
[RouterB-GigabitEthernet1/0/0] eth-trunk 1
[RouterB-GigabitEthernet1/0/0] quit
[RouterB] interface gigabitethernet 2/0/0
[RouterB-GigabitEthernet2/0/0] undo shutdown
[RouterB-GigabitEthernet2/0/0] eth-trunk 1
[RouterB-GigabitEthernet2/0/0] quit
4、验证配置结果
查看Eth-Trunk1的状态，以RouterA为例：
Trunk ID: 1
used status: VALID
TYPE: ethernet
Working Mode : Normal
Working State: Normal
Number Of Ports in Trunk = 2
Number Of UP Ports in Trunk = 2
operate status: up
Interface Ethernet1/0/0, valid, selected, operate up, weight=1,
standby interface NULL
Interface Ethernet2/0/0, valid, selected, operate up, weight=1,
standby interface NULL
用display port vlan命令查看Eth-Trunk端口上可以通过的VLAN信息。以RouterA为例：
Port Link Type PVID Trunk VLAN List
-------------------------------------------------------------------------------
Eth-Trunk1 trunk 0 1-4094
5、配置文件
1）RouterA的配置文件
#
sysname RouterA
#
interface Eth-Trunk1
portswitch
port link-type trunk
port trunk allow-pass vlan 1 to 4094
#
interface GigabitEthernet1/0/0
undo shutdown
eth-trunk 1
#
interface GigabitEthernet2/0/0
undo shutdown
eth-trunk 1
#
return
2）RouterB的配置文件
#
sysname RouterB
#
interface Eth-Trunk1
portswitch
port link-type trunk
port trunk allow-pass vlan 1 to 4094
#
interface GigabitEthernet1/0/0
undo shutdown
eth-trunk 1
#
interface GigabitEthernet2/0/0
undo shutdown
eth-trunk 1
#
return
二、三层Eth-Trunk接口配置实例
1、组网结构和需求
如下图所示，在RouterA与RouterB之间创建Eth-Trunk，将两个GE捆绑成一个Eth-Trunk，并在Eth-Trunk接口配上IP地址。
2、配置思路
采用如下的思路配置Eth-Trunk：
1）创建Eth-Trunk接口并配置IP地址。
2）把以太网接口加入Eth-Trunk接口。
3、配置步骤
1）配置RouterA
# 创建Eth-Trunk接口，并配置IP地址。
[RouterA] interface eth-trunk 1
[RouterA-Eth-Trunk1] ip address 192.168.0.1 255.255.255.0
[RouterA-Eth-Trunk1] quit
# 将接口GE1/0/0、GE2/0/0加入到Eth-Trunk 1中。
[RouterA] interface gigabitethernet 1/0/0
[RouterA-GigabitEthernet1/0/0] undo shutdown
[RouterA-GigabitEthernet1/0/0] eth-trunk 1
[RouterA-GigabitEthernet1/0/0] quit
[RouterA] interface gigabitethernet 2/0/0
[RouterA-GigabitEthernet2/0/0] undo shutdown
[RouterA-GigabitEthernet2/0/0] eth-trunk 1
[RouterA-GigabitEthernet2/0/0] quit
2）配置RouterB
# 创建Eth-Trunk接口，并配置IP地址。
[RouterB] interface eth-trunk 1
[RouterB-Eth-Trunk1] ip address 192.168.0.2 255.255.255.0
[RouterB-Eth-Trunk1] quit
# 将接口GE1/0/0、GE2/0/0加入到Eth-Trunk 1中。
[RouterB] interface gigabitethernet 1/0/0
[RouterB-GigabitEthernet1/0/0] undo shutdown
[RouterB-GigabitEthernet1/0/0] eth-trunk 1
[RouterB-GigabitEthernet1/0/0] quit
[RouterB] interface gigabitethernet 2/0/0
[RouterB-GigabitEthernet2/0/0] undo shutdown
[RouterB-GigabitEthernet2/0/0] eth-trunk 1
[RouterB-GigabitEthernet2/0/0] quit
4、检查配置结果
在RouterA或RouterB上执行display interface eth-trunk命令，可以看到接口状态为UP。以RouterA的显示为例。
[RouterA] display interface eth-trunk 1
Eth-Trunk1 current state : UP
Line protocol current state : UP
Last up time: 2011-01-13, 14:50:20
Description : HUAWEI, Quidway Series, Eth-Trunk1 Interface, Route Port
Hash arithmatic : According to flow
The Maximum Transmit Unit is 1500 bytes
Internet Address is 192.168.0.1/24
IP Sending Frames' Format is PKTFMT_ETHNT_2, Hardware address is 00e0-fc09-9722
Physical is ETH_TRUNK
Last 300 seconds input rate 0 bytes/sec, 0 packets/sec
Last 300 seconds output rate 0 bytes/sec, 0 packets/sec
Input: 1 packets,3 bytes,
7 unicast,9 broadcast,8 multicasts
10 errors,5 drops,11 unknowprotocol
Output: 2 packets,4 bytes,
12 unicast,14 broadcast,13x multicasts
15 errors,6 drops
-----------------------------------------------------
PortName Status Weight
-----------------------------------------------------
GigabitEthernet1/0/0 UP 1
GigabitEthernet2/0/0 UP 1
-----------------------------------------------------
The Number of Ports in Trunk : 2
The Number of UP Ports in Trunk : 2
RouterA和RouterB的Eth-Trunk接口能够互相Ping通。
[RouterA] ping 192.168.0.2
PING 192.168.0.2: 56 data bytes, press CTRL_C to break
Reply from 192.168.0.2: bytes=56 Sequence=1 ttl=255 time=31 ms
Reply from 192.168.0.2: bytes=56 Sequence=2 ttl=255 time=31 ms
Reply from 192.168.0.2: bytes=56 Sequence=3 ttl=255 time=62 ms
Reply from 192.168.0.2: bytes=56 Sequence=4 ttl=255 time=62 ms
Reply from 192.168.0.2: bytes=56 Sequence=5 ttl=255 time=62 ms
--- 192.168.0.2 ping statistics ---
5 packet(s) transmitted
5 packet(s) received
0.00% packet loss
round-trip min/avg/max = 31/49/62 ms
5、配置文件
1）RouterA的配置文件
#
sysname RouterA
#
interface Eth-Trunk1
ip address 192.168.0.1 255.255.255.0
#
interface GigabitEthernet1/0/0
undo shutdown
eth-trunk 1
#
interface GigabitEthernet2/0/0
undo shutdown
eth-trunk 1
#
return
2）RouterB的配置文件
#
sysname RouterB
#
interface Eth-Trunk1
ip address 192.168.0.2 255.255.255.0
#
interface GigabitEthernet1/0/0
undo shutdown
eth-trunk 1
#
interface GigabitEthernet2/0/0
undo shutdown
eth-trunk 1
#
return