思科C3750端口汇聚聚合
1.进入端口配置#interface range GigabitEthernet1/1/1-4
创建虚拟通道并配置trunk
#channel-group 2 mode auto 模式为auto
#switchport trunk encapsulation dot1q
#switchport mode trunk
生成如下配置：
interface GigabitEthernet1/1/1
switchport trunk encapsulation dot1q
switchport mode trunk
channel-group 2 mode auto
!
interface GigabitEthernet1/1/2
switchport trunk encapsulation dot1q
switchport mode trunk
channel-group 2 mode auto
!
interface GigabitEthernet1/1/3
switchport trunk encapsulation dot1q
switchport mode trunk
channel-group 2 mode auto
!
interface GigabitEthernet1/1/4
switchport trunk encapsulation dot1q
switchport mode trunk
channel-group 2 mode auto
!
同时在全局模式下，自动生成
!
interface Port-channel2
switchport trunk encapsulation dot1q
switchport mode trunk
!
2.同样方法在另一台交换机相应的端口上做如上同样的配置
3.在交换机上查看聚合信息
NST3750#sh etherchannel summary
Flags: D - down P - bundled in port-channel
I - stand-alone s - suspended
H - Hot-standby (LACP only)
R - Layer3 S - Layer2
U - in use f - failed to allocate aggregator
M - not in use, minimum links not met
u - unsuitable for bundling
w - waiting to be aggregated
d - default port
Number of channel-groups in use: 1
Number of aggregators: 1Group Port-channel Protocol Ports
------+-------------+-----------+-----------------------------------------------
2 Po2(SU) PAgP Gi1/1/1(P) Gi1/1/2(P) Gi1/1/3(D)
Gi1/1/4(D)
NST3750#sh etherchannel port-channel
Channel-group listing:
----------------------Group: 2
----------
Port-channels in the group:
---------------------------
Port-channel: Po2
------------
Age of the Port-channel = 8d:19h:28m:54s
Logical slot/port = 10/2 Number of ports = 2
GC = 0x00020001 HotStandBy port = null
Port state = Port-channel Ag-Inuse
Protocol = PAgP
Port security = Disabled
Ports in the Port-channel:
Index Load Port EC state No of bits
------+------+------+------------------+-----------
0 00 Gi1/1/1 Automatic-Sl 0
0 00 Gi1/1/2 Automatic-Sl 0
Time since last port bundled: 0d:00h:05m:01s Gi1/1/2
Time since last port Un-bundled: 0d:00h:05m:27s Gi1/1/2
聚合模式选择：