網絡工程師Day10 以太網接口和鏈路配置
學習目標
掌握接口速率的配置方法
掌握使用手動模式配置鏈路聚合的方法
掌握使用靜態ＬＡＣＰ模式配置鏈路聚合的方法
掌握在靜態LACP模式下配置接口優先級的方法
需要了解
隨着網絡規模的不斷擴大，用戶對骨幹鏈路的帶寬和可靠性提出了越來越高的要求，在傳統技術中，常用更換高速率的接口板或更換支持高速率接口板的設備的方式來增加帶寬，但這種方案需要付出高額的費用，而且不夠靈活
採用鏈路聚合技術可以在不進行硬件升級的條件下，通過將多個物理接口捆綁爲一個邏輯接口，來達到增加鏈路帶寬的目的。在實現增大帶寬目的的同時，鏈路聚合採用備份鏈路的機制，可以有效的提高設備之間鏈路的可靠性。
鏈路聚合一般部署在覈心結點，以便提升整個網絡的數據吞吐量。
鏈路聚合能夠提高鏈路帶寬，增強網絡可用性，支持負載分擔。
鏈路聚合模式分爲
手工負載均衡模式
LACP(link AGGREGATION CONTROL PROTOCOL)模式
手工負載分擔模式下所有接口都參與數據的轉發，分擔負載流量
LACP模式支持鏈路備份
一個快速以太口（FE口）和一個千兆以太口（GE口）不能加入同一個ETH-TRUNK，如果將兩個不同類型的接口加入到同一個ETH-TRUNK口，設備會提示發生錯誤。
只有LACP模式支持備份成員鏈路，如需要建立備份鏈路，應使用LACP模式的鏈路聚合。
如果要在路由器上配置三層鏈路聚合，需要首先創建ETH-TRUNK接口，然後在ET-TRUNK邏輯口上執行undo portswitch 命令，把聚合鏈路從二層轉爲三層鏈路，執行undo poerswitch 命令後，可以爲ETH-TRUNK邏輯口分配一個IP地址
拓撲圖
場景
現在公司購買了兩臺華爲的S5700系列的交換機，爲了提高交換機之間鏈路帶寬以及可靠性，需要在交換機上配置鏈路聚合功能
操作步驟
步驟一 以太網交換機基礎配置
修改接口的速率之前先關閉接口的自協調功能，然後將0/0/9和0/0/10接口的速率配置爲100mbit/s
int g0/0/9
undo negotiation auto
speed 100
但是進行驗證時沒有顯示其速率。
[s1]dis int g0/0/9
GigabitEthernet0/0/9 current state : UP
Line protocol current state : UP
Description:
Switch Port, PVID :1, TPID : 8100(Hex), The Maximum Frame Length is 9216
IP Sending Frames' Format is PKTFMT_ETHNT_2, Hardware address is 4c1f-cc1e-5b60
Last physical up time : 2019-08-28 23:46:08 UTC-08:00
Last physical down time : 2019-08-28 23:46:07 UTC-08:00
Current system time: 2019-08-28 23:49:21-08:00
Hardware address is 4c1f-cc1e-5b60
Last 300 seconds input rate 0 bytes/sec, 0 packets/sec
Last 300 seconds output rate 0 bytes/sec, 0 packets/sec
Input: 357 bytes, 3 packets
Output: 10948 bytes, 92 packets
Input:
Unicast: 0 packets, Multicast: 3 packets
Broadcast: 0 packets
Output:
Unicast: 0 packets, Multicast: 92 packets
Broadcast: 0 packets
Input bandwidth utilization : 0%
Output bandwidth utilization : 0%
步驟二 配置手動模式的鏈路聚合
在S1和S2上創建ETH-TRUNK 1,然後將G0/0/9和G0/0/10接口加入Eth-trunk 1 （注意：將接口加入ETH-TRUNK 前需要確認成員接口沒有任何配置）
S1
[s1]int Eth-Trunk 1
[s1-Eth-Trunk1]quit
[s1]int g0/0/9
[s1-GigabitEthernet0/0/9]eth
[s1-GigabitEthernet0/0/9]eth-trunk 1
Info: This operation may take a few seconds. Please wait for a moment...done.
[s1-GigabitEthernet0/0/9]quit
[s1]int g0/0/10
[s1-GigabitEthernet0/0/10]eth-reh
[s1-GigabitEthernet0/0/10]eth-
[s1-GigabitEthernet0/0/10]eth-trunk 1
Info: This operation may take a few seconds. Please wait for a moment...done.
[s1-GigabitEthernet0/0/10]quit
S2做相同配置
然後查看S1的配置
[s1]dis eth-trunk 1
Eth-Trunk1's state information is:
WorkingMode: NORMAL Hash arithmetic: According to SIP-XOR-DIP
Least Active-linknumber: 1 Max Bandwidth-affected-linknumber: 8
Operate status: up Number Of Up Port In Trunk: 2
--------------------------------------------------------------------------------
PortName Status Weight
GigabitEthernet0/0/9 Up 1
GigabitEthernet0/0/10 Up 1
步驟三 配置靜態LACP模式的鏈路聚合
刪除S1和S2上的0/0/9和0/0/10 接口下的配置
S1
[s1]int g0/0/9
[s1-GigabitEthernet0/0/9]undo et
[s1-GigabitEthernet0/0/9]undo eth-trunk
Info: This operation may take a few seconds. Please wait for a moment...done.
[s1-GigabitEthernet0/0/9]int g0/0/10
[s1-GigabitEthernet0/0/10]undo et
[s1-GigabitEthernet0/0/10]undo eth-trunk
Info: This operation may take a few seconds. Please wait for a moment...done.
[s1-GigabitEthernet0/0/10]quit
S2做相同的配置
創建ETH-TRUNK 1 並配置該ETH-TRUNK爲靜態LACP模式，然後將G0/0/9和G 0/0/10接口加入ETH-TRUNK 1
S1
[s1]INT Eth-Trunk 1
[s1-Eth-Trunk1]mode lacp-static
[s1-Eth-Trunk1]quit
[s1]int g0/0/9
[s1-GigabitEthernet0/0/9]eth-trunk 1
Info: This operation may take a few seconds. Please wait for a moment...done.
[s1-GigabitEthernet0/0/9]int g0/0/10
[s1-GigabitEthernet0/0/10]eth-trunk 1
Info: This operation may take a few seconds. Please wait for a moment...done.
S2做相同的配置
查看交換機上ETH-TRUNK的信息，查看鏈路是否協調成功
[s1]dis eth-trunk 1
Eth-Trunk1's state information is:
Local:
LAG ID: 1 WorkingMode: STATIC
Preempt Delay: Disabled Hash arithmetic: According to SIP-XOR-DIP
System Priority: 32768 System ID: 4c1f-cc1e-5b60
Least Active-linknumber: 1 Max Active-linknumber: 8
Operate status: up Number Of Up Port In Trunk: 2
--------------------------------------------------------------------------------
ActorPortName Status PortType PortPri PortNo PortKey PortState Weight
GigabitEthernet0/0/9 Selected 1GE 32768 10 305 10111100 1
GigabitEthernet0/0/10 Selected 1GE 32768 11 305 10111100 1
Partner:
--------------------------------------------------------------------------------
ActorPortName SysPri SystemIDPortPri PortNo PortKey PortState
GigabitEthernet0/0/9 327684c1f-cca0-2a34 32768 10 305 10111100
GigabitEthernet0/0/10 327684c1f-cca0-2a34 32768 11 305 10111100
在S1上配置LACP的系統優先級爲100，使其成爲LACP主動端
[s1]lacp priority 100
配置接口的優先級確定活動鏈路
[s1]int g0/0/9
[s1-GigabitEthernet0/0/9]lacp
[s1-GigabitEthernet0/0/9]lacp pri
[s1-GigabitEthernet0/0/9]lacp priority 100
[s1-GigabitEthernet0/0/9]int g0/0/10
[s1-GigabitEthernet0/0/10]lacp pri
[s1-GigabitEthernet0/0/10]lacp priority 100
驗證ETH-TRUNK的配置結果
[s1]dis eth-trunk 1
Eth-Trunk1's state information is:
Local:
LAG ID: 1 WorkingMode: STATIC
Preempt Delay: Disabled Hash arithmetic: According to SIP-XOR-DIP
System Priority: 100System ID: 4c1f-cc1e-5b60
Least Active-linknumber: 1 Max Active-linknumber: 8
Operate status: up Number Of Up Port In Trunk: 2
--------------------------------------------------------------------------------
ActorPortName Status PortType PortPri PortNo PortKey PortState Weight
GigabitEthernet0/0/9 Selected 1GE 100 10 305 10111100 1
GigabitEthernet0/0/10 Selected 1GE 100 11 305 10111100 1
Partner:
--------------------------------------------------------------------------------
ActorPortName SysPri SystemIDPortPri PortNo PortKey PortState
GigabitEthernet0/0/9 327684c1f-cca0-2a34 32768 10 305 10111100
GigabitEthernet0/0/10 327684c1f-cca0-2a34 32768 11 305 10111100
S2
[s2]dis eth-trunk 1
Eth-Trunk1's state information is:
Local:
LAG ID: 1 WorkingMode: STATIC
Preempt Delay: Disabled Hash arithmetic: According to SIP-XOR-DIP
System Priority: 32768 System ID: 4c1f-cca0-2a34
Least Active-linknumber: 1 Max Active-linknumber: 8
Operate status: up Number Of Up Port In Trunk: 2
--------------------------------------------------------------------------------
ActorPortName Status PortType PortPri PortNo PortKey PortState Weight
GigabitEthernet0/0/9 Selected 1GE 32768 10 305 10111100 1
GigabitEthernet0/0/10 Selected 1GE 32768 11 305 10111100 1
Partner:
--------------------------------------------------------------------------------
ActorPortName SysPri SystemIDPortPri PortNo PortKey PortState
GigabitEthernet0/0/9 100 4c1f-cc1e-5b60 100 10 305 10111100
GigabitEthernet0/0/10 100 4c1f-cc1e-5b60 100 11 305 10111100