链路聚合--动态模式配置以及转发规律

链路聚合–动态模式配置以及转发规律

项目背景

为实现sw1和sw2之间链路宽带够用，可连接多条线路，配置链路聚合

项目拓扑图

项目需求

1. 按照图示连接好线缆

2. 配置动态链路聚合，GE1/0/1、GE1/0/2加入至聚合1号组内

3. 配置以目的IP为负载分担的依据

配置思路

第一步：按照图示连接好线缆

第二步：在SW1和SW2上创建链路聚合接口并设置为动态链路聚合

第三步：将物理接口加入至对应聚合接口的聚合组内

第四步：设置负载分担模式，选择基于目的IP地址的参数

实施

第一步：将两台pc的IP地址配置完成

第二步：在两台交换机上创建聚合链路1号接口，并修改链路聚合模式为动态聚合

[sw1]int Bridge-Aggregation 1
[sw1-Bridge-Aggregation1]link-aggregation mode dynamic

[sw2]int Bridge-Aggregation 1
[sw2-Bridge-Aggregation1]link-aggregation mode dynamic

第三步：将物理接口加入到聚合接口1号组内

[sw1]int range g1/0/2 to g1/0/4
[sw1-if-range]port link-aggregation group 1

[sw2]int rang GigabitEthernet 1/0/2 to GigabitEthernet 1/0/4
[sw2-if-range]port link-aggregation group 1

第四步：使用display link-aggregation verbose查看两台交换机的聚合接口和物理接口的属性类配置是否一致

[sw1-if-range]display link-aggregation verbose
Loadsharing Type: Shar -- Loadsharing, NonS -- Non-Loadsharing 
Port: A -- Auto
Port Status: S -- Selected, U -- Unselected, I -- Individual 
Flags:  A -- LACP_Activity, B -- LACP_Timeout, C -- Aggregation, 
        D -- Synchronization, E -- Collecting, F -- Distributing,  
        G -- Defaulted, H -- Expired

Aggregate Interface: Bridge-Aggregation1
Aggregation Mode: Dynamic
Loadsharing Type: Shar
System ID: 0x8000, 8ef8-3c70-0200
Local: 
  Port                Status  Priority Oper-Key  Flag
--------------------------------------------------------------------------------
  GE1/0/2             S       32768    1         {ACDEF}
  GE1/0/3             S       32768    1         {ACDEF}
  GE1/0/4             S       32768    1         {ACDEF}
Remote: 
  Actor               Partner Priority Oper-Key  SystemID               Flag   
--------------------------------------------------------------------------------
  GE1/0/2             3       32768    1         0x8000, 8ef8-38c4-0100 {ACDEF}
  GE1/0/3             4       32768    1         0x8000, 8ef8-38c4-0100 {ACDEF}
  GE1/0/4             5       32768    1         0x8000, 8ef8-38c4-0100 {ACDEF}


[sw2-if-range]display link-aggregation verbose
Loadsharing Type: Shar -- Loadsharing, NonS -- Non-Loadsharing 
Port: A -- Auto
Port Status: S -- Selected, U -- Unselected, I -- Individual 
Flags:  A -- LACP_Activity, B -- LACP_Timeout, C -- Aggregation, 
        D -- Synchronization, E -- Collecting, F -- Distributing,  
        G -- Defaulted, H -- Expired

Aggregate Interface: Bridge-Aggregation1
Aggregation Mode: Dynamic
Loadsharing Type: Shar
System ID: 0x8000, 8ef8-38c4-0100
Local: 
  Port                Status  Priority Oper-Key  Flag
--------------------------------------------------------------------------------
  GE1/0/2             S       32768    1         {ACDEF}
  GE1/0/3             S       32768    1         {ACDEF}
  GE1/0/4             S       32768    1         {ACDEF}
Remote: 
  Actor               Partner Priority Oper-Key  SystemID               Flag   
--------------------------------------------------------------------------------
  GE1/0/2             3       32768    1         0x8000, 8ef8-3c70-0200 {ACDEF}
  GE1/0/3             4       32768    1         0x8000, 8ef8-3c70-0200 {ACDEF}
  GE1/0/4             5       32768    1         0x8000, 8ef8-3c70-0200 {ACDEF}

第五步：查看接口相关信息

[sw1-if-range]display interface brief
Brief information on interfaces in route mode:
Link: ADM - administratively down; Stby - standby
Protocol: (s) - spoofing
Interface            Link Protocol Primary IP      Description                
InLoop0              UP   UP(s)    --              
MGE0/0/0             DOWN DOWN     --              
NULL0                UP   UP(s)    --              
REG0                 UP   --       --              

Brief information on interfaces in bridge mode:
Link: ADM - administratively down; Stby - standby
Speed: (a) - auto
Duplex: (a)/A - auto; H - half; F - full
Type: A - access; T - trunk; H - hybrid
Interface            Link Speed   Duplex Type PVID Description                
BAGG1                UP   3G(a)   F(a)   A    1    
FGE1/0/53            DOWN 40G     A      A    1    
FGE1/0/54            DOWN 40G     A      A    1    
GE1/0/1              UP   1G(a)   F(a)   A    1    
GE1/0/2              UP   1G(a)   F(a)   A    1    
GE1/0/3              UP   1G(a)   F(a)   A    1    
GE1/0/4              UP   1G(a)   F(a)   A    1    
GE1/0/5              DOWN auto    A      A    1  

BAGG1就是你的聚合接口，它可以叠加物理接口的带宽，这里面的speed就是速率

第六步：设置链路聚合负载分担模式为基于目的ip

[sw1-Bridge-Aggregation1]link-aggregation load-sharing mode destination-ip


[sw2-Bridge-Aggregation1]link-aggregation load-sharing mode destination-ip

第七步：在pc上ping另一方，通过抓包查看负载分担效果

0/2接口（没有找到ping包）

0/3接口

0/4接口

从上面三个接口的抓包结果看，说明信息随机分配到此接口进行转发