拓扑:

配置PAgp的二层以太通道_第1张图片

配置需求:

将拓扑中的SW1和SW2的E1/0和E1/1这两个接口捆绑成一个链路。


配置步骤如下:

1、我们在SW1的e1/0-1配置PAgp

SW1(config)#interface range e1/0-1

SW1(config-if-range)#shutdown 

SW1(config-if-range)#switchport trunk encapsulation dot1q 

SW1(config-if-range)#switchport mode trunk 

SW1(config-if-range)#channel-group 1 mode desirable 

Creating a port-channel interface Port-channel 1

SW1(config-if-range)#no shutdown 


2、我们在SW2的e1/0-1配置PAgp

SW2(config)#int range e1/0-2

SW2(config-if-range)#shutdown 

SW2(config-if-range)#switchport trunk encapsulation dot1q 

SW2(config-if-range)#switchport mode trunk 

SW2(config-if-range)#channel-group 10 mode auto 

Creating a port-channel interface Port-channel 10

SW2(config-if-range)#no shutdown 


验证如下:

SW2(config)#do show 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      N - not in use, no aggregation

        f - failed to allocate aggregator


        M - not in use, minimum links not met

        m - not in use, port not aggregated due to minimum links not met

        u - unsuitable for bundling

        w - waiting to be aggregated

        d - default port


        A - formed by Auto LAG



Number of channel-groups in use: 1

Number of aggregators:           1


Group  Port-channel  Protocol    Ports

------+-------------+-----------+-----------------------------------------------

10     Po10(SU)        PAgP      Et1/0(P)    Et1/1(P)    Et1/2(I) 


两个接口被捆绑到以太通道组10(本地意义,两端可不相同),S代表是二层,U代表可用,P代表绑定成功。


验证如下:

SW2#show interfaces port-channel 10

Port-channel10 is up, line protocol is up (connected) 

  Hardware is EtherChannel, address is aabb.cc00.4011 (bia aabb.cc00.4011)

  MTU 1500 bytes, BW 20000 Kbit/sec, DLY 1000 usec, //捆绑之后的带宽为20Mbps

     reliability 255/255, txload 1/255, rxload 1/255

  Encapsulation ARPA, loopback not set

  Keepalive set (10 sec)

  Auto-duplex, Auto-speed, media type is unknown

  input flow-control is off, output flow-control is unsupported 

  Members in this channel: Et1/0 Et1/1 

  ARP type: ARPA, ARP Timeout 04:00:00

  Last input 00:00:01, output never, output hang never

  Last clearing of "show interface" counters never

  Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 0

  Queueing strategy: fifo

  Output queue: 0/40 (size/max)

  5 minute input rate 1000 bits/sec, 1 packets/sec

  5 minute output rate 0 bits/sec, 0 packets/sec

     74 packets input, 6145 bytes, 0 no buffer

     Received 66 broadcasts (0 multicasts)

     0 runts, 0 giants, 0 throttles 

     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored

     0 input packets with dribble condition detected

     82 packets output, 7828 bytes, 0 underruns

     0 output errors, 0 collisions, 0 interface resets

     0 unknown protocol drops

     0 babbles, 0 late collision, 0 deferred

     0 lost carrier, 0 no carrier

     0 output buffer failures, 0 output buffers swapped out