CISCO-端口聚合实验配置案例
一、实验目的
学习如何配置 端口聚合
熟悉配置 端口聚合 的三种模式，并验证配置效果
二、实验内容
配置 cisco 私有 PAgP协 议的端口聚合，并验证效果
配置 IEEE 的 LACP 协议的端口聚合，并验证效果
配置 手动 链路聚合，并验证效果
1） 二层 PAgp链路聚合
① 端口加入端口聚合组
PAgP是通过数据到的交互进行的协商组成链路聚合，需将协议配置成对应的模式，端口就可以通过数据包协商链路聚合。
模式
desirable
auto
desirable
匹配
匹配
auto
匹配
不匹配
SW1
Switch>enable
Switch#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)#hostname SW1
SW1(config)#int range f0/1 -2
SW1(config-if-range)#channel-group 1 mode desirable
SW1(config-if-range)#
Creating a port-channel interface Port-channel 1
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/2, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/2, changed state to up
SW2
Switch>enable
Switch#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)#hostname SW2
SW2(config)#int range f0/1-2
SW2(config-if-range)#channel-group 1 mode auto
SW2(config-if-range)#
Creating a port-channel interface Port-channel 1
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/2, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/2, changed state to up
（可以尝试两端端口聚合号码配置不一致，看看能否成功协商）
② 验证端口聚合
验证链路聚合
SW2#show etherchannel summary
Flags: D - down P - in port-channel # 在端口聚合中
I - stand-alone s - suspended
H - Hot-standby (LACP only)
R - Layer3 S - Layer2 # 二层
U - in use # 正在使用 f - failed to allocate aggregator
u - unsuitable for bundling
w - waiting to be aggregated
d - default port
Number of channel-groups in use: 1
Number of aggregators: 1
Group Port-channel Protocol Ports
------+-------------+-----------+----------------------------------------------
1 Po1(SU) PAgP Fa0/1(P) Fa0/2(P)
查看生成树，我们可以得知两条链路已通过链路聚合组成一条逻辑链路，并没有触发环路阻塞
SW2#show spanning-tree
VLAN0001
Spanning tree enabled protocol ieee
Root ID Priority 32769
Address 0060.47B7.8ED1
Cost 9
Port 27(Port-channel1)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32769 (priority 32768 sys-id-ext 1)
Address 0060.7035.D93C
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 20
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Po1 Root FWD 9 128.27 Shr
2） 二层 LACP链路聚合
① 端口加入端口聚合组
LACP是通过数据到的交互进行的协商组成链路聚合，需将协议配置成对应的模式，端口就可以通过数据包协商链路聚合。
模式
desirable
auto
active
匹配
匹配
passive
匹配
不匹配
SW1
Switch>enable
Switch#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)#host SW1
SW1(config)#int range f0/1-2
SW1(config-if-range)#channel-group 1 mode active
Creating a port-channel interface Port-channel 1
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/2, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/2, changed state to up
SW2
Switch>enable
Switch#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)#host SW2
SW2(config)#int range f0/1-2
SW2(config-if-range)#channel-group 2 mode passive
SW2(config-if-range)#
Creating a port-channel interface Port-channel 2
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/2, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/2, changed state to up
（通过实验验证，两端链路聚合号码不一致，也是可以成功协商的）
② 验证端口聚合
验证链路聚合
SW1#show etherchannel summary
Flags: D - down P - 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
u - unsuitable for bundling
w - waiting to be aggregated
d - default port
Number of channel-groups in use: 1
Number of aggregators: 1
Group Port-channel Protocol Ports
------+-------------+-----------+----------------------------------------------
1 Po1(SU) LACP Fa0/1(P) Fa0/2(P)
查看生成树，我们可以得知两条链路已通过链路聚合组成一条逻辑链路，并没有触发环路阻塞
SW1#show spanning-tree
VLAN0001
Spanning tree enabled protocol ieee
Root ID Priority 32769
Address 0060.47B7.8ED1
This bridge is the root
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32769 (priority 32768 sys-id-ext 1)
Address 0060.47B7.8ED1
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 20
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Po1 Desg FWD 9 128.27 Shr
2）手动 配置 链路聚合
① 端口加入端口聚合组
链路聚合的手动模式：指定是将两条链路强制绑定为一条逻辑链路，应用方向：一些三层设备比如路由器，没有二层端口不支持协议的协商，只能手动配置，但是如果对端为二层设备比如交换机，则需要设置成手动模式。
SW1
Switch>enable
Switch#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)#host SW1
SW1(config)#int range f0/1 - 2
SW1(config-if-range)#channel-group 1 mode on
SW2
Switch>enable
Switch#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)#int range f0/1-2
Switch(config-if-range)#channel-group 1 mode on
② 验证端口聚合
验证链路聚合
SW1#show etherchannel summary
Flags: D - down P - 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
u - unsuitable for bundling
w - waiting to be aggregated
d - default port
Number of channel-groups in use: 1
Number of aggregators: 1
Group Port-channel Protocol Ports
------+-------------+-----------+----------------------------------------------
1 Po1(SU) - Fa0/1(P) Fa0/2(P)
隐藏：路由器对接交换机
SW1
WAN_ROUTER>enable
WAN_ROUTER#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
WAN_ROUTER(config)#int port-channel 1
WAN_ROUTER(config-if)#exit
WAN_ROUTER(config)#int range gi0/0/0-1
WAN_ROUTER(config-if-range)#channel-group 1
WAN_ROUTER(config-if-range)#no shut
%LINK-5-CHANGED: Interface GigabitEthernet0/0/0, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/0/0, changed state to up
%LINK-5-CHANGED: Interface Port-channel1, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface Port-channel1, changed state to up
%LINK-5-CHANGED: Interface GigabitEthernet0/0/1, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/0/1, changed state to up
WAN_ROUTER(config-if-range)#exit
WAN_ROUTER(config)#int po1
WAN_ROUTER(config-if)#ip add 1.1.1.1 255.0.0.0
SW2
L3_SW>enable
L3_SW#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
L3_SW(config)#int range f0/1-2
L3_SW(config-if-range)#channel-group 1 mode on
L3_SW(config-if-range)#
Creating a port-channel interface Port-channel 1
%LINK-5-CHANGED: Interface Port-channel1, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface Port-channel1, changed state to up
L3_SW(config-if)#int po1
L3_SW(config-if)#no switchport
%LINEPROTO-5-UPDOWN: Line protocol on Interface Port-channel1, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface Port-channel1, changed state to up
L3_SW(config-if)#ip add 1.1.1.2 255.0.0.0
L3_SW(config-if)#do ping 1.1.1.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 1.1.1.1, timeout is 2 seconds:
.!!!!
Success rate is 80 percent (4/5), round-trip min/avg/max = 0/0/0 ms
② 验证端口聚合
交换机 - 验证链路聚合
L3_SW#show etherchannel summary
Flags: D - down P - 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
u - unsuitable for bundling
w - waiting to be aggregated
d - default port
Number of channel-groups in use: 1
Number of aggregators: 1
Group Port-channel Protocol Ports
------+-------------+-----------+----------------------------------------------
1 Po1(RU) - Fa0/1(P) Fa0/2(P)
路由器 - 验证链路聚合
WAN_ROUTER#show ip int brief
Interface IP-Address OK? Method Status Protocol
Port-channel1 1.1.1.1 YES manual up up
GigabitEthernet0/0/0 unassigned YES unset up up
GigabitEthernet0/0/1 unassigned YES unset up up
Vlan1 unassigned YES unset administratively down down
WAN_ROUTER#show interfaces port-channel 1
Port-channel1 is up, line protocol is up (connected)
Hardware is EtherChannel, address is 0001.6455.00de (bia 0001.6455.00de)
Internet address is 1.1.1.1/8
MTU 1500 bytes, BW 2100000 Kbit, DLY 1000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Half-duplex, 2100Mb/s
input flow-control is off, output flow-control is off
Members in this channel: Gig0/0/0 ,Gig0/0/1 ,
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:08, output 00:00:05, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue :0/40 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
956 packets input, 193351 bytes, 0 no buffer
Received 956 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
0 watchdog, 0 multicast, 0 pause input
0 input packets with dribble condition detected
2357 packets output, 263570 bytes, 0 underruns
0 output errors, 0 collisions, 10 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out