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防火墙RBM旁挂对接交换机M-LAG VLAN双活网关动态路由组网典型配置

2024-08-12 发表

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孔凡安

孔凡安九段

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组网及说明

组网说明：

1.FW_01和FW_02采用RBM双机主备部署，交叉互联旁挂在Border上。对接方式和案例（https://zhiliao.h3c.com/theme/details/223781）类似，可以参考。

2.FW使用三层聚合（动态链路聚合）子接口和Border对接，RAGG1.100位于Trust安全域；RAGG1.101位于Untrust安全域。实际组网中建议使用RAGG接口而不是vlan-if接口。

3.Border_01和Border_02 M-LAG双归接入三层网络。配置VRF隔离，分别和FW建立不同的OSPF进程。

4.Border上vlan-if10对接ASW,vlan-if100对接FW Trust域，vlan-if101对接FW Untrust域，vlan-if200对接上行Internet。

5.ASW模拟接入交换机，配置缺省路由下一跳为Border设备VRRP虚地址。模拟测试为访问互联网Internet。

6.防火墙聚合接口编号为1，并非10。图示有点问题懒得改了。

配置步骤

防火墙相关配置：

FW1

FW2

RBM基础配置

interface GigabitEthernet1/0/0

port link-mode route

combo enable copper

port link-aggregation group 64

interface Route-Aggregation64

ip address 192.168.12.1 255.255.255.252

link-aggregation mode dynamic

remote-backup group

data-channel interface Route-Aggregation64

configuration sync-check interval 12

delay-time 30

adjust-cost ospf enable absolute 65535

track 1

track 2

local-ip 192.168.12.1

remote-ip 192.168.12.2

device-role primary

interface GigabitEthernet1/0/0

port link-mode route

combo enable copper

port link-aggregation group 64

interface Route-Aggregation64

ip address 192.168.12.2 255.255.255.252

link-aggregation mode dynamic

remote-backup group

data-channel interface Route-Aggregation64

configuration sync-check interval 12

delay-time 30

adjust-cost ospf enable absolute 65535

track 1

track 2

local-ip 192.168.12.2

remote-ip 192.168.12.1

device-role secondary

业务接口，安全域，策略

interface GigabitEthernet1/0/1

port link-mode route

combo enable copper

port link-aggregation group 1

interface GigabitEthernet1/0/2

port link-mode route

combo enable copper

port link-aggregation group 1

interface Route-Aggregation1

link-aggregation mode dynamic

interface Route-Aggregation1.100

description to_border_v1

ip address 10.134.100.1 255.255.255.0

vlan-type dot1q vid 100

interface Route-Aggregation1.101

description to_border_v2

ip address 10.134.101.1 255.255.255.0

ospf bfd enable

vlan-type dot1q vid 101

security-zone name Trust

import interface Route-Aggregation1.100

security-zone name Untrust

import interface Route-Aggregation1.101

security-policy ip

rule 0 name ospf

action pass

service ospf

rule 1 name ping

action pass

service ping

interface GigabitEthernet1/0/1

port link-mode route

combo enable copper

port link-aggregation group 1

interface GigabitEthernet1/0/2

port link-mode route

combo enable copper

port link-aggregation group 1

interface Route-Aggregation1

link-aggregation mode dynamic

interface Route-Aggregation1.100

description to_border_v1

ip address 10.134.100.2 255.255.255.0

vlan-type dot1q vid 100

interface Route-Aggregation1.101

description to_border_v2

ip address 10.134.101.2 255.255.255.0

ospf bfd enable

vlan-type dot1q vid 101

security-zone name Trust

import interface Route-Aggregation1.100

security-zone name Untrust

import interface Route-Aggregation1.101

security-policy ip

rule 0 name ospf

action pass

service ospf

rule 1 name ping

action pass

service ping

路由配置

interface LoopBack0

description ospf_r_id

ip address 1.1.1.1 255.255.255.255

ospf 1 router-id 1.1.1.1

area 0.0.0.0

network 10.134.100.0 0.0.0.255

network 10.134.101.0 0.0.0.255

interface LoopBack0

description ospf_r_id

ip address 2.2.2.2 255.255.255.255

ospf 1 router-id 2.2.2.2

area 0.0.0.0

network 10.134.100.0 0.0.0.255

network 10.134.101.0 0.0.0.255

可靠性

track 1 interface Route-Aggregation1.100

track 2 interface Route-Aggregation1.101

track 1 interface Route-Aggregation1.100

track 2 interface Route-Aggregation1.101

===============================================================================================

交换机相关配置：

Border_01

Border_02

系统参数

interface GigabitEthernet1/0/1

port link-mode route

combo enable fiber

ip address 192.168.34.3 255.255.255.0

m-lag mad exclude interface GigabitEthernet1/0/1

m-lag system-mac 0034-0034-0034

m-lag system-number 1

m-lag consistency-check disable

m-lag standalone enable

m-lag keepalive ip destination 192.168.34.4 source 192.168.34.3

interface GigabitEthernet1/0/1

port link-mode route

combo enable fiber

ip address 192.168.34.4 255.255.255.0

m-lag mad exclude interface GigabitEthernet1/0/1

m-lag role priority 65535

m-lag system-mac 0034-0034-0034

m-lag system-number 2

m-lag consistency-check disable

m-lag standalone enable

m-lag keepalive ip destination 192.168.34.3 source 192.168.34.4

peer-link接口

interface GigabitEthernet1/0/2

port link-mode bridge

port link-type trunk

undo port trunk permit vlan 1

port trunk permit vlan 10 100 to 101 200

combo enable fiber

port link-aggregation group 1024

interface Bridge-Aggregation1024

description peerlink

port link-type trunk

undo port trunk permit vlan 1

port trunk permit vlan 10 100 to 101 200

link-aggregation mode dynamic

port m-lag peer-link 1

undo mac-address static source-check enable

interface GigabitEthernet1/0/2

port link-mode bridge

port link-type trunk

undo port trunk permit vlan 1

port trunk permit vlan 10 100 to 101 200

combo enable fiber

port link-aggregation group 1024

interface Bridge-Aggregation1024

description peerlink

port link-type trunk

undo port trunk permit vlan 1

port trunk permit vlan 10 100 to 101 200

link-aggregation mode dynamic

port m-lag peer-link 1

undo mac-address static source-check enable

m-lag接口

interface GigabitEthernet1/0/3

port link-mode bridge

port link-type trunk

undo port trunk permit vlan 1

port trunk permit vlan 100 to 101

combo enable fiber

port link-aggregation group 10

interface GigabitEthernet1/0/4

port link-mode bridge

port link-type trunk

undo port trunk permit vlan 1

port trunk permit vlan 100 to 101

combo enable fiber

port link-aggregation group 11

interface GigabitEthernet1/0/5

port link-mode bridge

port access vlan 200

combo enable fiber

port link-aggregation group 100

interface GigabitEthernet1/0/6

port link-mode bridge

port link-type trunk

undo port trunk permit vlan 1

port trunk permit vlan 10

combo enable fiber

port link-aggregation group 1

interface Bridge-Aggregation1

description to_asw

port link-type trunk

undo port trunk permit vlan 1

port trunk permit vlan 10

link-aggregation mode dynamic

port lacp system-priority 32

port m-lag group 1

interface Bridge-Aggregation10

description to_fw01

port link-type trunk

undo port trunk permit vlan 1

port trunk permit vlan 100 to 101

link-aggregation mode dynamic

port lacp system-priority 32

port m-lag group 10

interface Bridge-Aggregation11

description to_fw02

port link-type trunk

undo port trunk permit vlan 1

port trunk permit vlan 100 to 101

link-aggregation mode dynamic

port lacp system-priority 32

port m-lag group 11

interface Bridge-Aggregation100

description to_internet

port access vlan 200

link-aggregation mode dynamic

port lacp system-priority 32

port m-lag group 100

interface GigabitEthernet1/0/3

port link-mode bridge

port link-type trunk

undo port trunk permit vlan 1

port trunk permit vlan 100 to 101

combo enable fiber

port link-aggregation group 11

interface GigabitEthernet1/0/4

port link-mode bridge

port link-type trunk

undo port trunk permit vlan 1

port trunk permit vlan 100 to 101

combo enable fiber

port link-aggregation group 10

interface GigabitEthernet1/0/5

port link-mode bridge

port access vlan 200

combo enable fiber

port link-aggregation group 100

interface GigabitEthernet1/0/6

port link-mode bridge

port link-type trunk

undo port trunk permit vlan 1

port trunk permit vlan 10

combo enable fiber

port link-aggregation group 1

interface Bridge-Aggregation1

description to_asw

port link-type trunk

undo port trunk permit vlan 1

port trunk permit vlan 10

link-aggregation mode dynamic

port m-lag group 1

interface Bridge-Aggregation10

description to_fw01

port link-type trunk

undo port trunk permit vlan 1

port trunk permit vlan 100 to 101

link-aggregation mode dynamic

port m-lag group 10

interface Bridge-Aggregation11

description to_fw02

port link-type trunk

undo port trunk permit vlan 1

port trunk permit vlan 100 to 101

link-aggregation mode dynamic

port m-lag group 11

interface Bridge-Aggregation100

description to_internet

port access vlan 200

link-aggregation mode dynamic

port m-lag group 100

OSPF

ip vpn-instance v1

ip vpn-instance v2

interface LoopBack0

description ospf_v1_r_id

ip address 3.3.3.3 255.255.255.255

interface LoopBack10

description ospf_v2_r_id

ip address 13.13.13.13 255.255.255.255

interface Vlan-interface10

ip binding vpn-instance v1

ip address 10.1.10.3 255.255.255.0

vrrp vrid 10 virtual-ip 10.1.10.10

vrrp vrid 10 priority 254

interface Vlan-interface100

ip binding vpn-instance v1

ip address 10.134.100.10 255.255.255.0

ospf dr-priority 255

ospf peer sub-address enable 10.134.100.13

port m-lag virtual-ip 10.134.100.13 255.255.255.0 active

mac-address 0001-0001-0001

interface Vlan-interface101

ip binding vpn-instance v2

ip address 10.134.101.10 255.255.255.0

ospf dr-priority 255

ospf bfd enable

ospf peer sub-address enable 10.134.101.13

port m-lag virtual-ip 10.134.101.13 255.255.255.0 active

mac-address 0002-0002-0002

interface Vlan-interface200

ip binding vpn-instance v2

ip address 10.1.200.10 255.255.255.0

ospf dr-priority 255

ospf bfd enable

ospf peer sub-address enable 10.1.200.13

port m-lag virtual-ip 10.1.200.13 255.255.255.0 active

mac-address 0003-0003-0003

ospf 1 router-id 3.3.3.3 vpn-instance v1

area 0.0.0.0

network 10.1.10.0 0.0.0.255

network 10.134.100.0 0.0.0.255

ospf 13 router-id 13.13.13.13 vpn-instance v2

area 0.0.0.0

network 10.1.200.0 0.0.0.255

network 10.134.101.0 0.0.0.255

ip vpn-instance v1

ip vpn-instance v2

interface LoopBack0

description ospf_v1_r_id

ip address 4.4.4.4 255.255.255.255

interface LoopBack10

description ospf_v2_r_id

ip address 14.14.14.14 255.255.255.255

interface Vlan-interface10

ip binding vpn-instance v1

ip address 10.1.10.4 255.255.255.0

vrrp vrid 10 virtual-ip 10.1.10.10

interface Vlan-interface100

ip binding vpn-instance v1

ip address 10.134.100.10 255.255.255.0

ospf dr-priority 25

ospf peer sub-address enable 10.134.100.14

port m-lag virtual-ip 10.134.100.14 255.255.255.0 active

mac-address 0001-0001-0001

interface Vlan-interface101

ip binding vpn-instance v2

ip address 10.134.101.10 255.255.255.0

ospf dr-priority 25

ospf bfd enable

ospf peer sub-address enable 10.134.101.14

port m-lag virtual-ip 10.134.101.14 255.255.255.0 active

mac-address 0002-0002-0002

interface Vlan-interface200

ip binding vpn-instance v2

ip address 10.1.200.10 255.255.255.0

ospf bfd enable

ospf peer sub-address enable 10.1.200.14

port m-lag virtual-ip 10.1.200.14 255.255.255.0 active

mac-address 0003-0003-0003

ospf 1 router-id 4.4.4.4 vpn-instance v1

area 0.0.0.0

network 10.1.10.0 0.0.0.255

network 10.134.100.0 0.0.0.255

ospf 3 router-id 14.14.14.14 vpn-instance v2

area 0.0.0.0

network 10.1.200.0 0.0.0.255

network 10.134.101.0 0.0.0.255

============================================================================================

接入交换机和公网模拟配置：

ASW

Internet

interface Bridge-Aggregation10

port link-type trunk

undo port trunk permit vlan 1

port trunk permit vlan 10

link-aggregation mode dynamic

interface Vlan-interface10

ip address 10.1.10.5 255.255.255.0

interface GigabitEthernet1/0/1

port link-mode bridge

port link-type trunk

undo port trunk permit vlan 1

port trunk permit vlan 10

combo enable fiber

port link-aggregation group 10

interface GigabitEthernet1/0/2

port link-mode bridge

port link-type trunk

undo port trunk permit vlan 1

port trunk permit vlan 10

combo enable fiber

port link-aggregation group 10

ip route-static 0.0.0.0 0 10.1.10.10 description to_border

interface LoopBack0

description ospf_r_id

ip address 6.6.6.6 255.255.255.255

interface LoopBack1

description internet

ip address 114.114.114.114 255.255.255.255

interface Route-Aggregation1

ip address 10.1.200.6 255.255.255.0

link-aggregation mode dynamic

interface GigabitEthernet0/0

port link-mode route

combo enable copper

port link-aggregation group 1

interface GigabitEthernet0/1

port link-mode route

combo enable copper

port link-aggregation group 1

ospf 1 router-id 6.6.6.6

default-route-advertise always

area 0.0.0.0

network 10.1.200.0 0.0.0.255

===============================================================================================

以上案例没有考虑出口做NAT的场景，公网侧可以直接学习到私网侧的路由。实际现网中出口设备做NAT，将NAT地址池中路由发布到公网即可。

案例模拟测试ASW ping测试Internet侧环回口地址114.114.114.114即可

公网侧路由：

<internet>disp ip routing-table protocol ospf

Summary count : 9

OSPF Routing table status : <Active>

Summary count : 8

Destination/Mask Proto Pre Cost NextHop Interface

10.1.10.0/24 O_INTRA 10 4 10.1.200.13 RAGG1

O_INTRA 10 4 10.1.200.14 RAGG1

10.134.100.0/24 O_INTRA 10 3 10.1.200.13 RAGG1

O_INTRA 10 3 10.1.200.14 RAGG1

10.134.101.0/24 O_INTRA 10 2 10.1.200.13 RAGG1

O_INTRA 10 2 10.1.200.14 RAGG1

相关表项查看：

设备

路由

Border

<border_01>disp ospf peer

OSPF Process 1 with Router ID 3.3.3.3

Neighbor Brief Information

Area: 0.0.0.0

Router ID Address Pri Dead-Time State Interface

1.1.1.1 10.134.100.1 1 33 Full/DROther Vlan100

2.2.2.2 10.134.100.2 1 37 Full/DROther Vlan100

4.4.4.4 10.134.100.14 25 36 Full/BDR Vlan100

4.4.4.4 10.1.10.4 1 34 Full/DR Vlan10

OSPF Process 13 with Router ID 13.13.13.13

Neighbor Brief Information

Area: 0.0.0.0

Router ID Address Pri Dead-Time State Interface

1.1.1.1 10.134.101.1 1 35 Full/DROther Vlan101

2.2.2.2 10.134.101.2 1 39 Full/DROther Vlan101

14.14.14.14 10.134.101.14 25 35 Full/BDR Vlan101

6.6.6.6 10.1.200.6 1 32 Full/DROther Vlan200

14.14.14.14 10.1.200.14 1 36 Full/BDR Vlan200

<border_02> disp ospf peer

OSPF Process 1 with Router ID 4.4.4.4

Neighbor Brief Information

Area: 0.0.0.0

Router ID Address Pri Dead-Time State Interface

1.1.1.1 10.134.100.1 1 39 Full/DROther Vlan100

2.2.2.2 10.134.100.2 1 33 Full/DROther Vlan100

3.3.3.3 10.134.100.13 255 34 Full/DR Vlan100

3.3.3.3 10.1.10.3 1 32 Full/BDR Vlan10

OSPF Process 3 with Router ID 14.14.14.14

Neighbor Brief Information

Area: 0.0.0.0

Router ID Address Pri Dead-Time State Interface

1.1.1.1 10.134.101.1 1 31 Full/DROther Vlan101

2.2.2.2 10.134.101.2 1 35 Full/DROther Vlan101

13.13.13.13 10.134.101.13 255 33 Full/DR Vlan101

6.6.6.6 10.1.200.6 1 38 Full/DROther Vlan200

13.13.13.13 10.1.200.13 255 34 Full/DR Vlan200

<border_01>disp ip routing-table vpn-instance v1 protocol ospf

Summary count : 6

OSPF Routing table status : <Active>

Summary count : 4

Destination/Mask Proto Pre Cost NextHop Interface

0.0.0.0/0 O_ASE2 150 1 10.134.100.1 Vlan100

10.1.200.0/24 O_INTRA 10 3 10.134.100.1 Vlan100

10.134.101.0/24 O_INTRA 10 2 10.134.100.1 Vlan100

100.1.1.1/32 O_ASE2 150 1 10.134.100.1 Vlan100

OSPF Routing table status : <Inactive>

Summary count : 2

Destination/Mask Proto Pre Cost NextHop Interface

10.1.10.0/24 O_INTRA 10 1 0.0.0.0 Vlan10

10.134.100.0/24 O_INTRA 10 1 0.0.0.0 Vlan100

<border_02> disp ip routing-table vpn-instance v1 protocol ospf

Summary count : 6

OSPF Routing table status : <Active>

Summary count : 4

Destination/Mask Proto Pre Cost NextHop Interface

0.0.0.0/0 O_ASE2 150 1 10.134.100.1 Vlan100

10.1.200.0/24 O_INTRA 10 3 10.134.100.1 Vlan100

10.134.101.0/24 O_INTRA 10 2 10.134.100.1 Vlan100

100.1.1.1/32 O_ASE2 150 1 10.134.100.1 Vlan100

OSPF Routing table status : <Inactive>

Summary count : 2

Destination/Mask Proto Pre Cost NextHop Interface

10.1.10.0/24 O_INTRA 10 1 0.0.0.0 Vlan10

10.134.100.0/24 O_INTRA 10 1 0.0.0.0 Vlan100

<border_01>disp ip routing-table vpn-instance v2 protocol ospf

Summary count : 6

OSPF Routing table status : <Active>

Summary count : 4

Destination/Mask Proto Pre Cost NextHop Interface

0.0.0.0/0 O_ASE2 150 1 10.1.200.6 Vlan200

10.1.10.0/24 O_INTRA 10 3 10.134.101.1 Vlan101

10.134.100.0/24 O_INTRA 10 2 10.134.101.1 Vlan101

100.1.1.1/32 O_ASE2 150 1 10.134.101.1 Vlan101

OSPF Routing table status : <Inactive>

Summary count : 2

Destination/Mask Proto Pre Cost NextHop Interface

10.1.200.0/24 O_INTRA 10 1 0.0.0.0 Vlan200

10.134.101.0/24 O_INTRA 10 1 0.0.0.0 Vlan101

<border_02> disp ip routing-table vpn-instance v2 protocol ospf

Summary count : 6

OSPF Routing table status : <Active>

Summary count : 4

Destination/Mask Proto Pre Cost NextHop Interface

0.0.0.0/0 O_ASE2 150 1 10.1.200.6 Vlan200

10.1.10.0/24 O_INTRA 10 3 10.134.101.1 Vlan101

10.134.100.0/24 O_INTRA 10 2 10.134.101.1 Vlan101

100.1.1.1/32 O_ASE2 150 1 10.134.101.1 Vlan101

OSPF Routing table status : <Inactive>

Summary count : 2

Destination/Mask Proto Pre Cost NextHop Interface

10.1.200.0/24 O_INTRA 10 1 0.0.0.0 Vlan200

10.134.101.0/24 O_INTRA 10 1 0.0.0.0 Vlan101

RBM_P<fw_01>disp ospf peer

OSPF Process 1 with Router ID 1.1.1.1

Neighbor Brief Information

Area: 0.0.0.0

Router ID Address Pri Dead-Time State Interface

2.2.2.2 10.134.100.2 1 31 2-Way/ - RAGG1.100

3.3.3.3 10.134.100.13 255 35 Full/DR RAGG1.100

4.4.4.4 10.134.100.14 25 39 Full/BDR RAGG1.100

2.2.2.2 10.134.101.2 1 32 2-Way/ - RAGG1.101

13.13.13.13 10.134.101.13 255 33 Full/DR RAGG1.101

14.14.14.14 10.134.101.14 25 38 Full/BDR RAGG1.101

RBM_S<fw_02>disp ospf peer

OSPF Process 1 with Router ID 2.2.2.2

Neighbor Brief Information

Area: 0.0.0.0

Router ID Address Pri Dead-Time State Interface

1.1.1.1 10.134.100.1 1 33 2-Way/ - RAGG1.100

3.3.3.3 10.134.100.13 255 29 Full/DR RAGG1.100

4.4.4.4 10.134.100.14 25 33 Full/BDR RAGG1.100

1.1.1.1 10.134.101.1 1 34 2-Way/ - RAGG1.101

13.13.13.13 10.134.101.13 255 39 Full/DR RAGG1.101

14.14.14.14 10.134.101.14 25 32 Full/BDR RAGG1.101

RBM_P<fw_01>disp ip routing-table protocol ospf

Summary count : 10

OSPF Routing table status : <Active>

Summary count : 6

Destination/Mask Proto Pre Cost NextHop Interface

0.0.0.0/0 O_ASE2 150 1 10.134.101.13 RAGG1.101

O_ASE2 150 1 10.134.101.14 RAGG1.101

10.1.10.0/24 O_INTRA 10 2 10.134.100.13 RAGG1.100

O_INTRA 10 2 10.134.100.14 RAGG1.100

10.1.200.0/24 O_INTRA 10 2 10.134.101.13 RAGG1.101

O_INTRA 10 2 10.134.101.14 RAGG1.101

OSPF Routing table status : <Inactive>

Summary count : 4

Destination/Mask Proto Pre Cost NextHop Interface

10.134.100.0/24 O_INTRA 10 1 0.0.0.0 RAGG1.100

10.134.101.0/24 O_INTRA 10 1 0.0.0.0 RAGG1.101

100.1.1.1/32 O_ASE2 150 65535 10.134.100.2 RAGG1.100

100.1.1.1/32 O_ASE2 150 65535 10.134.101.2 RAGG1.101

RBM_S<fw_02>disp ip routing-table protocol ospf

Summary count : 10

OSPF Routing table status : <Active>

Summary count : 6

Destination/Mask Proto Pre Cost NextHop Interface

0.0.0.0/0 O_ASE2 150 1 10.134.101.13 RAGG1.101

O_ASE2 150 1 10.134.101.14 RAGG1.101

10.1.10.0/24 O_INTRA 10 65536 10.134.100.13 RAGG1.100

O_INTRA 10 65536 10.134.100.14 RAGG1.100

10.1.200.0/24 O_INTRA 10 65536 10.134.101.13 RAGG1.101

O_INTRA 10 65536 10.134.101.14 RAGG1.101

OSPF Routing table status : <Inactive>

Summary count : 4

Destination/Mask Proto Pre Cost NextHop Interface

10.134.100.0/24 O_INTRA 10 65535 0.0.0.0 RAGG1.100

10.134.101.0/24 O_INTRA 10 65535 0.0.0.0 RAGG1.101

100.1.1.1/32 O_ASE2 150 1 10.134.100.1 RAGG1.100

100.1.1.1/32 O_ASE2 150 1 10.134.101.1 RAGG1.101

配置关键点

1.FW并非所有配置都是同步的，常见的：安全域和安全策略可以从RBM_P同步到RBM_S，有些配置无法同步（如接口地址，Track，路由配置等），配置的时候需要对比所有相关配置防止遗漏。

2.FW 安全策略需要针对基础协议OSPF单独放通，否则导致OSPF邻居建立失败。

3.FW使用三层子接口必须配置vlan终结命令，需要对端发出的报文携带对应的vlan标签。如果对端发出的报文不带vlan标签，则使用聚合口对接。

4.Border peer-link链路两端端口上关闭报文入接口与静态MAC地址表项匹配检查功能，以确保三层单播流量转发正常。

5.两台Border作为双活网关时，vlan-if接口存在相同的IP地址和MAC地址，需要配置M-LAG虚拟IP地址建立OSPF邻居，并指定active参数。否则则该虚拟IPv4地址只在角色为Primary的M-LAG设备上处于可用状态。

6.Border配置m-lag独立工作模式，并配置lacp系统优先级。应对peer-link链路和Keepalive链路均发生故障场景。这个感兴趣的可以模拟测试。

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