华三M-lag配置案例

1.22  M-LAG典型配置举例

1.22.1  M-LAG基本功能配置举例

1. 组网需求

·     由于用户对于业务的可靠性要求很高，如果Device C和接入设备（Device A和Device B）之间配置链路聚合只能保证链路级的可靠性，接入设备发生故障时则会导致业务中断。这时用户可以采用M-LAG技术，正常工作时链路进行负载分担且任何一台设备故障对业务均没有影响，保证业务的高可靠性。

·     配置三层以太网接口为保留接口，在该三层以太网口上搭建Keepalive链路，保证Keepalive报文能够正常传输。

2. 组网图

图1-12 M-LAG基本功能配置组网图

3. 配置步骤

(1)     配置Device A

# 系统配置。

<DeviceA> system-view

[DeviceA] m-lag system-mac 1-1-1

[DeviceA] m-lag system-number 1

[DeviceA] m-lag system-priority 123

# 配置Keepalive报文的目的IP地址和源IP地址。

[DeviceA] m-lag keepalive ip destination 1.1.1.1 source 1.1.1.2

# 配置端口Ten-GigabitEthernet1/0/5工作在三层模式，并配置IP地址为Keepalive报文的源IP地址。

[DeviceA] interface ten-gigabitethernet 1/0/5

[DeviceA-Ten-GigabitEthernet1/0/5] port link-mode route

[DeviceA-Ten-GigabitEthernet1/0/5] ip address 1.1.1.2 24

[DeviceA-Ten-GigabitEthernet1/0/5] quit

# 配置Keepalive链路接口为M-LAG保留接口。

[DeviceA] m-lag mad exclude interface ten-gigabitethernet 1/0/5

# 创建二层聚合接口3，并配置该接口为动态聚合模式。

[DeviceA] interface bridge-aggregation 3

[DeviceA-Bridge-Aggregation3] link-aggregation mode dynamic

[DeviceA-Bridge-Aggregation3] quit

# 分别将端口Ten-GigabitEthernet1/0/1和Ten-GigabitEthernet1/0/2加入到聚合组3中。

[DeviceA] interface ten-gigabitethernet 1/0/1

[DeviceA-Ten-GigabitEthernet1/0/1] port link-aggregation group 3

[DeviceA-Ten-GigabitEthernet1/0/1] quit

[DeviceA] interface ten-gigabitethernet 1/0/2

[DeviceA-Ten-GigabitEthernet1/0/2] port link-aggregation group 3

[DeviceA-Ten-GigabitEthernet1/0/2] quit

# 将二层聚合接口3配置为peer-link接口。

[DeviceA] interface bridge-aggregation 3

[DeviceA-Bridge-Aggregation3] port m-lag peer-link 1

[DeviceA-Bridge-Aggregation3] undo mac-address static source-check enable

[DeviceA-Bridge-Aggregation3] quit

# 创建二层聚合接口4，并配置该接口为动态聚合模式。

[DeviceA] interface bridge-aggregation 4

[DeviceA-Bridge-Aggregation4] link-aggregation mode dynamic

[DeviceA-Bridge-Aggregation4] quit

# 分别将端口Ten-GigabitEthernet1/0/3和Ten-GigabitEthernet1/0/4加入到聚合组4中。

[DeviceA] interface ten-gigabitethernet 1/0/3

[DeviceA-Ten-GigabitEthernet1/0/3] port link-aggregation group 4

[DeviceA-Ten-GigabitEthernet1/0/3] quit

[DeviceA] interface ten-gigabitethernet 1/0/4

[DeviceA-Ten-GigabitEthernet1/0/4] port link-aggregation group 4

[DeviceA-Ten-GigabitEthernet1/0/4] quit

# 将二层聚合接口4加入M-LAG组4中。

[DeviceA] interface bridge-aggregation 4

[DeviceA-Bridge-Aggregation4] port m-lag group 4

[DeviceA-Bridge-Aggregation4] quit

(2)     配置Device B

# 系统配置。

<DeviceB> system-view

[DeviceB] m-lag system-mac 1-1-1

[DeviceB] m-lag system-number 2

[DeviceB] m-lag system-priority 123

# 配置Keepalive报文的目的IP地址和源IP地址。

[DeviceB] m-lag keepalive ip destination 1.1.1.2 source 1.1.1.1

# 配置端口Ten-GigabitEthernet1/0/5工作在三层模式，并配置IP地址为Keepalive报文的源IP地址。

[DeviceB] interface ten-gigabitethernet 1/0/5

[DeviceB-Ten-GigabitEthernet1/0/5] port link-mode route

[DeviceB-Ten-GigabitEthernet1/0/5] ip address 1.1.1.1 24

[DeviceB-Ten-GigabitEthernet1/0/5] quit

# 配置Keepalive链路接口为M-LAG保留接口。

[DeviceB] m-lag mad exclude interface ten-gigabitethernet 1/0/5

# 创建二层聚合接口3，并配置该接口为动态聚合模式。

[DeviceB] interface bridge-aggregation 3

[DeviceB-Bridge-Aggregation3] link-aggregation mode dynamic

[DeviceB-Bridge-Aggregation3] quit

# 分别将端口Ten-GigabitEthernet1/0/1和Ten-GigabitEthernet1/0/2加入到聚合组3中。

[DeviceB] interface ten-gigabitethernet 1/0/1

[DeviceB-Ten-GigabitEthernet1/0/1] port link-aggregation group 3

[DeviceB-Ten-GigabitEthernet1/0/1] quit

[DeviceB] interface ten-gigabitethernet 1/0/2

[DeviceB-Ten-GigabitEthernet1/0/2] port link-aggregation group 3

[DeviceB-Ten-GigabitEthernet1/0/2] quit

# 将二层聚合接口3配置为peer-link接口。

[DeviceB] interface bridge-aggregation 3

[DeviceB-Bridge-Aggregation3] port m-lag peer-link 1

[DeviceB-Bridge-Aggregation3] undo mac-address static source-check enable

[DeviceB-Bridge-Aggregation3] quit

# 创建二层聚合接口4，并配置该接口为动态聚合模式。

[DeviceB] interface bridge-aggregation 4

[DeviceB-Bridge-Aggregation4] link-aggregation mode dynamic

[DeviceB-Bridge-Aggregation4] quit

# 分别将端口Ten-GigabitEthernet1/0/3和Ten-GigabitEthernet1/0/4加入到聚合组4中。

[DeviceB] interface ten-gigabitethernet 1/0/3

[DeviceB-Ten-GigabitEthernet1/0/3] port link-aggregation group 4

[DeviceB-Ten-GigabitEthernet1/0/3] quit

[DeviceB] interface ten-gigabitethernet 1/0/4

[DeviceB-Ten-GigabitEthernet1/0/4] port link-aggregation group 4

[DeviceB-Ten-GigabitEthernet1/0/4] quit

# 将二层聚合接口4加入M-LAG组4中。

[DeviceB] interface bridge-aggregation 4

[DeviceB-Bridge-Aggregation4] port m-lag group 4

[DeviceB-Bridge-Aggregation4] quit

(3)     配置Device C

# 创建二层聚合接口4，并配置该接口为动态聚合模式。

<DeviceC> system-view

[DeviceC] interface bridge-aggregation 4

[DeviceC-Bridge-Aggregation4] link-aggregation mode dynamic

[DeviceC-Bridge-Aggregation4] quit

# 分别将端口Ten-GigabitEthernet1/0/1～Ten-GigabitEthernet1/0/4加入到聚合组4中。

[DeviceC] interface range ten-gigabitethernet 1/0/1 to ten-gigabitethernet 1/0/4

[DeviceC-if-range] port link-aggregation group 4

[DeviceC-if-range] quit

4. 验证配置

# 查看Device A上M-LAG的Keepalive报文信息。

[DeviceA] display m-lag keepalive

Neighbor keepalive link status (cause): Up

Neighbor is alive for: 104 s 16 ms

Keepalive packet transmission status:

  Sent: Successful

  Received: Successful

Last received keepalive packet information:

  Source IP address: 1.1.1.1

  Time: 2019/09/11 09:21:51

  Action: Accept

M-LAG keepalive parameters:

Destination IP address: 1.1.1.1

Source IP address: 1.1.1.2

Keepalive UDP port : 6400

Keepalive VPN name : N/A

Keepalive interval : 1000 ms

Keepalive timeout  : 5 sec

Keepalive hold time: 3 sec

以上信息表明Device A和Device B设备间无故障。

# 查看Device A上peer-link接口和M-LAG接口的摘要信息和详细信息。

[DeviceA] display m-lag summary

Flags: A -- Aggregate interface down, B -- No peer M-LAG interface configured

       C -- Configuration consistency check failed

Peer-link interface: BAGG3

Peer-link interface state (cause): UP

Keepalive link state (cause): UP

                     M-LAG interface information

M-LAG IF    M-LAG group  Local state (cause)  Peer state  Remaining down time (s)

BAGG4       4            UP                   UP          -

[DeviceA] display m-lag verbose

Flags: A -- Home_Gateway, B -- Neighbor_Gateway, C -- Other_Gateway,

       D -- PeerLink_Activity, E -- DRCP_Timeout, F -- Gateway_Sync,

       G -- Port_Sync, H -- Expired

Peer-link interface/Peer-link interface ID: BAGG3/1

State: UP

Cause: -

Local DRCP flags/Peer DRCP flags: ABDFG/ABDFG

Local Selected ports (index): XGE1/0/1 (1), XGE1/0/2 (2)

Peer Selected ports indexes: 1, 2

M-LAG interface/M-LAG group ID: BAGG4/4

Local M-LAG interface state: UP

Peer M-LAG interface state: UP

M-LAG group state: UP

Local M-LAG interface down cause: -

Remaining M-LAG DOWN time: -

Local M-LAG interface LACP MAC: COnfig=0001-0001-0001, Effective=0001-0001-0001

Peer M-LAG interface LACP MAC: COnfig=0001-0001-0001, Effective=0001-0001-0001

Local M-LAG interface LACP priority: COnfig=123, Effective=123

Peer M-LAG interface LACP priority: COnfig=123, Effective=123

Local DRCP flags/Peer DRCP flags: ABDFG/ABDFG

Local Selected ports (index): XGE1/0/3 (16387), XGE1/0/4 (16388)

Peer Selected ports indexes: 32771, 32772

以上信息表明Device A和Device B成功组成M-LAG系统。

# 查看Device C上聚合组4的详细信息。

[DeviceC] display link-aggregation verbose bridge-aggregation 4

Loadsharing Type: Shar -- Loadsharing, NonS -- Non-Loadsharing

Port Status: S -- Selected, U -- Unselected, I -- Individual

Port: A -- Auto port, M -- Management port, R -- Reference port

Flags:  A -- LACP_Activity, B -- LACP_Timeout, C -- Aggregation,

        D -- Synchronization, E -- Collecting, F -- Distributing,

        G -- Defaulted, H -- Expired

Aggregate Interface: Bridge-Aggregation4

Creation Mode: Manual

Aggregation Mode: Dynamic

Loadsharing Type: Shar

Management VLANs: None

System ID: 0x8000, 2e56-cbae-0600

Local:

  Port                Status   Priority Index    Oper-Key               Flag

  XGE1/0/1(R)         S        32768    1        1                      {ACDEF}

  XGE1/0/2            S        32768    2        1                      {ACDEF}

  XGE1/0/3            S        32768    3        1                      {ACDEF}

  XGE1/0/4            S        32768    4        1                      {ACDEF}

Remote:

  Actor               Priority Index    Oper-Key SystemID               Flag

  XGE1/0/1            32768    16387    40004    0x7b  , 0001-0001-0001 {ACDEF}

  XGE1/0/2            32768    16388    40004    0x7b  , 0001-0001-0001 {ACDEF}

  XGE1/0/3            32768    32771    40004    0x7b  , 0001-0001-0001 {ACDEF}

  XGE1/0/4            32768    32772    40004    0x7b  , 0001-0001-0001 {ACDEF}

以上信息表明，Device C的端口Ten-GigabitEthernet1/0/1～Ten-GigabitEthernet1/0/4均处于选中状态，此时Device C将DeviceA和DeviceB认为是一台设备，从而实现了跨设备的聚合。