【转载】Cisco-portchannel 链路聚合、流量负载均衡 （经验）

portchannel配置 http://yaofengkisss.blog.163.com/blog/static/126733642201262482557137/

负载情况

7609#show etherchannel load-balance    查看 负载方式
EtherChannel Load-Balancing Configuration:
        src-dst-ip
        mpls label-ip

EtherChannel Load-Balancing Addresses Used Per-Protocol:
Non-IP: Source XOR Destination MAC address
  IPv4: Source XOR Destination IP address
  IPv6: Source XOR Destination IP address
  MPLS: Label or IP

7609#show etherchannel summary  
Flags:  D - down        P - bundled in port-channel
  Group  Port-channel  Protocol    Ports
------+-------------+-----------+----------------------------------------------- 
60     Po60(RU)         -        Gi2/5(P)   Gi2/6(P)   Gi2/7(P)   Gi4/5(P)  
61     Po61(RU)         -        Gi1/8(P)   Gi2/14(P)  Gi3/9(P)   Gi3/12(P) 

 

7609#show etherchannel detail        

Port-channel: Po60
------------

Age of the Port-channel   = 9d:02h:34m:28s
Logical slot/port   = 14/8          Number of ports = 4
GC                  = 0x00000000      HotStandBy port = null
Passive port list   = Gi2/5 Gi2/6 Gi2/7 Gi4/5
Port state          = Port-channel L3-Ag Ag-Inuse
Protocol            =    -

Ports in the Port-channel:

Index   Load   Port     EC state        No of bits
------+------+------+------------------+-----------
  0     11     Gi2/5    On    2
  1     22     Gi2/6    On    2
  2     44     Gi2/7    On    2
  3     88     Gi4/5    On    2

Time since last port bundled:    1d:04h:32m:55s    Gi1/8
Time since last port Un-bundled: 0d:03h:24m:07s    Gi1/8

Port-channel: Po61
------------

Age of the Port-channel   = 0d:03h:38m:32s
Logical slot/port   = 14/10          Number of ports = 4
GC                  = 0x00000000      HotStandBy port = null
Passive port list   = Gi1/8 Gi2/14 Gi3/9 Gi3/12
Port state          = Port-channel L3-Ag Ag-Inuse
Protocol            =    -

Ports in the Port-channel:

Index   Load   Port     EC state        No of bits
------+------+------+------------------+-----------
  0     11     Gi1/8    On    2
  3     22     Gi2/14   On    2
  1     44     Gi3/9    On    2
  2     88     Gi3/12   On    2

Time since last port bundled:    0d:03h:02m:52s    Gi2/14

 以上是port-channel 的使用情况 通过实验 得出结论  cisco port-channel 的条数 为 2 4 8 才能使接口的流量均衡；以上都是个人摸索理解仅供参考。下图是 port-channel 条数  与 负载的流量比例。

 http://www.cisco.com/en/US/tech/tk389/tk213/technologies_tech_note09186a0080094714.shtml  图片来自