M-LAG与OSPF BFD快速收敛方案（HCL实验）

lin874939350

16人浏览 · 2026-07-06 13:50:39

lin874939350 · 2026-07-06 13:50:39 发布

真实工厂项目背景

已简化拓扑

AF配置OSPF发布默认路由，与双活网关通过独立VLAN建立P2P邻居（VLAN10/11），并启用500ms BFD检测，速报死收敛路由；
双活网关建立M-LAG组（系统MAC 0001-0001-0001），使用172.16.0.0/30作为Keepalive链路，Bridge-Aggregation100作为Peer-Link；
业务VLAN20（10.10.20.0/24）通过M-LAG组2,动态聚合向下连接SW3，配置DHCP中继指向AF（8.8.8.8）；
SW3通过动态聚合链路（Bridge-Aggregation1）双上行连接M-LAG组。

本次实验拓扑

AF：

sys
#创建vlan
vlan 10 11

#配置ospf
ospf 1 router-id 10.100.100.1
 default-route-advertise always
 area 0.0.0.0
  network 8.8.8.8 0.0.0.0
  network 10.100.100.0 0.0.0.255
  network 10.100.101.0 0.0.0.255

#vlanif接口下配置bfd
interface Vlan-interface10
 ip address 10.100.100.1 255.255.255.0
 ospf network-type p2p
 ospf bfd enable
 bfd min-transmit-interval 500
 bfd min-receive-interval 500

interface Vlan-interface11
 ip address 10.100.101.1 255.255.255.0
 ospf network-type p2p
 ospf bfd enable
 bfd min-transmit-interval 500
 bfd min-receive-interval 500

#因为深信服防火墙没有stp
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
 undo stp enable
#
interface GigabitEthernet1/0/2
 port link-mode bridge
 port link-type trunk
 undo port trunk permit vlan 1
 port trunk permit vlan 11
 combo enable fiber
 undo stp enable

#模拟业务
int loo0
ip add 8.8.8.8 32

#配置路由跟踪
 quit
 ip unreachables enable
 ip ttl-expires enable
#配置dhcp服务器
dhcp enable

dhcp server ip-pool vlan20
 gateway-list 10.10.20.1
 network 10.10.20.0 mask 255.255.255.0

SW1

sys

vlan 10 20

#配置m-lag
 m-lag mad include interface GigabitEthernet1/0/19
 m-lag system-mac 0001-0001-0001
 m-lag system-number 1
 m-lag system-priority 100
 m-lag consistency-check disable
 m-lag keepalive interval 500
 m-lag keepalive ip destination 172.16.0.2 source 172.16.0.1

interface GigabitEthernet1/0/19
 port link-mode route
 ip address 172.16.0.1 255.255.255.252

#配置peer-link
interface Bridge-Aggregation100
quit

interface GigabitEthernet1/0/10
 port link-aggregation group 100

interface GigabitEthernet1/0/11
 port link-aggregation group 100


interface Bridge-Aggregation100
 port link-type trunk
 undo port trunk permit vlan 1
 port trunk permit vlan 2 to 4094
 link-aggregation mode dynamic
 port m-lag peer-link 1


#配置m-lag成员组
interface Bridge-Aggregation2
quit
interface GigabitEthernet1/0/3 
port link-aggregation group 2
quit

interface Bridge-Aggregation2
 port link-type trunk
 port trunk permit vlan 1 20
 link-delay down 0
 link-aggregation mode dynamic
 port m-lag group 2


#配置ospf
ospf 1 router-id 10.100.100.2
silent-interface Vlan-interface 20
 area 0.0.0.0
  network 10.100.100.0 0.0.0.255
 area 0.0.0.2
  network 10.10.20.0 0.0.0.255

interface Vlan-interface10
 ip address 10.100.100.2 255.255.255.0
 ospf network-type p2p
 ospf bfd enable
 bfd min-transmit-interval 500
 bfd min-receive-interval 500

#配置业务dhcp中继服务
interface Vlan-interface20
 ip address 10.10.20.1 255.255.255.0
 mac-address 0001-0002-0001
 dhcp select relay
 dhcp relay server-address 8.8.8.8

#配置dhcp服务
dhcp enable

SW2

sys

vlan 10 20

#配置m-lag
 m-lag mad include interface GigabitEthernet1/0/19
 m-lag system-mac 0001-0001-0001
 m-lag system-number 1
 m-lag system-priority 100
 m-lag consistency-check disable
 m-lag keepalive interval 500
 m-lag keepalive ip destination 172.16.0.1 source 172.16.0.2

interface GigabitEthernet1/0/19
 port link-mode route
 combo enable fiber
 ip address 172.16.0.2 255.255.255.252

#配置peer-link
interface Bridge-Aggregation100
quit

interface GigabitEthernet1/0/10
 port link-aggregation group 100

interface GigabitEthernet1/0/11
 port link-aggregation group 100


interface Bridge-Aggregation100
 port link-type trunk
 undo port trunk permit vlan 1
 port trunk permit vlan 2 to 4094
 link-aggregation mode dynamic
 port m-lag peer-link 1


#配置m-lag成员组
interface Bridge-Aggregation2
quit
interface GigabitEthernet1/0/3 
port link-aggregation group 2
quit

interface Bridge-Aggregation2
 port link-type trunk
 port trunk permit vlan 1 20
 link-delay down 0
 link-aggregation mode dynamic
 port m-lag group 2


#配置ospf
ospf 1 router-id 10.100.100.2
silent-interface Vlan-interface 20
 area 0.0.0.0
  network 10.100.101.0 0.0.0.255
 area 0.0.0.2
  network 10.10.20.0 0.0.0.255

interface Vlan-interface11
 ip address 10.100.101.3 255.255.255.0
 ospf network-type p2p
 ospf bfd enable
 bfd min-transmit-interval 500
 bfd min-receive-interval 500

#配置业务dhcp中继服务
interface Vlan-interface20
 ip address 10.10.20.1 255.255.255.0
 mac-address 0001-0002-0001
 dhcp select relay
 dhcp relay server-address 8.8.8.8

#配置dhcp服务
dhcp enable

SW3

sys
vlan 20


#配置链路聚合对接上联的M-LAG
interface Bridge-Aggregation1
quit
interface GigabitEthernet1/0/3
 port link-aggregation group 1
#
interface GigabitEthernet1/0/4
 port link-aggregation group 1


interface Bridge-Aggregation1
 port link-type trunk
 undo port trunk permit vlan 1
 port trunk permit vlan 20
 link-delay down 0
 link-aggregation mode dynamic


#配置PC的接口

interface GigabitEthernet1/0/1
 port link-mode bridge
 port access vlan 20
 stp edged-port

AF的ospf邻居和路由情况

<AF>dis ospf peer

         OSPF Process 1 with Router ID 10.100.100.1
               Neighbor Brief Information

 Area: 0.0.0.0
 Router ID       Address         Pri Dead-Time  State             Interface
 10.100.100.2    10.100.100.2    1   31         Full/ -           Vlan10
 10.100.100.3    10.100.101.3    1   35         Full/ -           Vlan11

<AF>dis ip routing-table protocol ospf

Summary count : 5

OSPF Routing table status : <Active>
Summary count : 2

Destination/Mask   Proto   Pre Cost        NextHop         Interface
10.10.20.0/24      O_INTER 10  2           10.100.100.2    Vlan10
                                           10.100.101.3    Vlan11

OSPF Routing table status : <Inactive>
Summary count : 3

Destination/Mask   Proto   Pre Cost        NextHop         Interface
8.8.8.8/32         O_INTRA 10  0           0.0.0.0         Loop0
10.100.100.0/24    O_INTRA 10  1           0.0.0.0         Vlan10
10.100.101.0/24    O_INTRA 10  1           0.0.0.0         Vlan11

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