配置流量根据链路优先级主备备份

SE_YT
1
2025-11-28

通过配置根据链路优先级主备备份，FW可以在主接口链路故障时，使用备份接口链路转发流量，提高传输的可靠性。

组网需求

如图1所示，企业从ISP1租用2条链路，带宽均为50M，从ISP2租用1条链路，带宽为10M。

  • 企业希望优先使用ISP1的2条链路传输上网流量，只有当ISP1的2条链路均故障时，才使用ISP2链路。

  • 企业的税务申报业务优先使用ISP2链路，只有当ISP2链路故障时，才使用ISP1链路。

图1 根据链路优先级主备备份组网图
配置流量根据链路优先级主备备份

配置思路

由于企业希望优先使用ISP1链路，所以全局智能选路方式可以设置为根据链路优先级主备备份，指定2条ISP1链路的优先级均为2，ISP2链路的优先级为1。而税务申报业务需要优先使用ISP2链路，所以要针对税务申报应用配置策略路由智能选路，选路方式也是根据链路优先级主备备份，并指定ISP2链路的优先级为2，2条ISP1链路的优先级均为1。为了保证主接口链路故障时，FW可以使用备份接口链路转发流量，还需要配置健康检查功能。

  1. 配置健康检查功能，分别为ISP1和ISP2链路配置健康检查。

  2. 配置接口的IP地址、安全区域、网关地址和带宽，并在接口上应用健康检查。

  3. 配置全局选路策略。配置智能选路方式为根据链路优先级主备备份，接口GE1/0/1和GE1/0/2加入一个接口组ifgrp1，并和接口GE1/0/7一起作为智能选路成员。分别为接口组ifgrp1和接口GE1/0/7设置优先级，接口GE1/0/1和GE1/0/2的优先级即等于接口组ifgrp1的优先级。

  4. 配置策略路由智能选路。为税务申报应用新建一条策略路由，配置智能选路方式为根据链路优先级主备备份，分别为接口组ifgrp1和接口GE1/0/7设置优先级。

  5. 配置基本的安全策略，允许企业内网用户访问外网资源。

配置流量根据链路优先级主备备份

本例着重介绍智能选路相关的配置，其余配置如NAT请根据实际组网进行配置。

操作步骤

  1. 可选：开启健康检查功能，并为ISP1和ISP2链路分别新建一个健康检查。假设ISP1网络的目的地址网段为3.3.10.0/24，ISP2网络的目的地址网段为9.9.20.0/24。  
    <FW> system-view
[FW] healthcheck enable
[FW] healthcheck name isp1_health_01
[FW-healthcheck-isp1_health_01] destination 3.3.10.10 interface GigabitEthernet 1/0/1 protocol tcp-simple destination-port 10001
[FW-healthcheck-isp1_health_01] destination 3.3.10.11 interface GigabitEthernet 1/0/1 protocol tcp-simple destination-port 10002
[FW-healthcheck-isp1_health_01] quit
[FW] healthcheck name isp1_health_02
[FW-healthcheck-isp1_health_02] destination 3.3.10.12 interface GigabitEthernet 1/0/2 protocol tcp-simple destination-port 10001
[FW-healthcheck-isp1_health_02] destination 3.3.10.13 interface GigabitEthernet 1/0/2 protocol tcp-simple destination-port 10002
[FW-healthcheck-isp1_health_02] quit
[FW] healthcheck name isp2_health
[FW-healthcheck-isp2_health] destination 9.9.20.20 interface GigabitEthernet 1/0/7 protocol tcp-simple destination-port 10003
[FW-healthcheck-isp2_health] destination 9.9.20.21 interface GigabitEthernet 1/0/7 protocol tcp-simple destination-port 10004
[FW-healthcheck-isp2_health] quit
    配置流量根据链路优先级主备备份

    此处假设3.3.10.10～3.3.10.13和9.9.20.20、9.9.20.21分别为ISP1和ISP2网络中已知的设备地址。

    如果健康检查配置完后，状态一直为down，请检查健康检查的配置。

    对于V500R001C80之前的版本，需要在FW上配置对应的安全策略，允许FW向目的设备发送健康检查探测报文。对于V500R001C80及之后的版本，健康检查的探测报文不受安全策略控制，默认放行，无需配置相应安全策略。

     

  2. 配置接口的IP地址和网关地址，配置接口所在链路的带宽，并应用对应的健康检查。  
    [FW] interface GigabitEthernet 1/0/1
[FW-GigabitEthernet1/0/1] ip address 1.1.1.1 255.255.255.0
[FW-GigabitEthernet1/0/1] gateway 1.1.1.254
[FW-GigabitEthernet1/0/1] bandwidth ingress 50000
[FW-GigabitEthernet1/0/1] bandwidth egress 50000
[FW-GigabitEthernet1/0/1] healthcheck isp1_health_01
[FW-GigabitEthernet1/0/1] quit
[FW] interface GigabitEthernet 1/0/2
[FW-GigabitEthernet1/0/2] ip address 1.1.2.2 255.255.255.0
[FW-GigabitEthernet1/0/2] gateway 1.1.2.254
[FW-GigabitEthernet1/0/2] bandwidth ingress 50000
[FW-GigabitEthernet1/0/2] bandwidth egress 50000
[FW-GigabitEthernet1/0/2] healthcheck isp1_health_02
[FW-GigabitEthernet1/0/2] quit
[FW] interface GigabitEthernet 1/0/3
[FW-GigabitEthernet1/0/3] ip address 10.3.0.1 255.255.255.0
[FW-GigabitEthernet1/0/3] quit
[FW] interface GigabitEthernet 1/0/7
[FW-GigabitEthernet1/0/7] ip address 2.2.2.2 255.255.255.0
[FW-GigabitEthernet1/0/7] gateway 2.2.2.254
[FW-GigabitEthernet1/0/7] bandwidth ingress 10000
[FW-GigabitEthernet1/0/7] bandwidth egress 10000
[FW-GigabitEthernet1/0/7] healthcheck isp2_health
[FW-GigabitEthernet1/0/7] quit

     

  3. 新建接口组ifgrp1，并将接口GE1/0/1和GE1/0/2加入接口组。  
    [FW] interface-group 1 name ifgrp1
[FW-interface-group-1] add interface GigabitEthernet 1/0/1
[FW-interface-group-1] add interface GigabitEthernet 1/0/2
[FW-interface-group-1] quit

     

  4. 配置全局选路策略，流量根据链路优先级主备备份。  
    [FW] multi-interface
[FW-multi-inter] mode priority-of-userdefine
[FW-multi-inter] add interface-group ifgrp1 priority 2
[FW-multi-inter] add interface GigabitEthernet1/0/7
[FW-multi-inter] quit

     

  5. 自定义税务申报应用，假设应用服务器的IP地址为8.8.8.8，端口为20001。  
    [FW] sa
[FW-sa] user-defined-application name UD_tax_system
[FW-sa-user-defined-app-UD_tax_system] rule name 1
[FW-sa-user-defined-app-UD_tax_system-rule-1] ip-address 8.8.8.8 32
[FW-sa-user-defined-app-UD_tax_system-rule-1] port 20001
[FW-sa-user-defined-app-UD_tax_system-rule-1] quit
[FW-sa-user-defined-app-UD_tax_system] quit
[FW-sa] quit

     

  6. 为税务申报应用配置策略路由智能选路，流量根据链路优先级主备备份。  
    [FW] policy-based-route
[FW-policy-pbr] rule name tax_system
[FW-policy-pbr-rule-tax_system] source-zone trust
[FW-policy-pbr-rule-tax_system] application app UD_tax_system
[FW-policy-pbr-rule-tax_system] action pbr egress-interface multi-interface
[FW-policy-pbr-rule-tax_system-multi-inter] mode priority-of-userdefine
[FW-policy-pbr-rule-tax_system-multi-inter] add interface-group ifgrp1
[FW-policy-pbr-rule-tax_system-multi-inter] add interface GigabitEthernet1/0/7 priority 2
[FW-policy-pbr-rule-tax_system-multi-inter] quit
[FW-policy-pbr] quit

     

  7. 将接口加入安全区域。  
    [FW] firewall zone trust
[FW-zone-trust] add interface GigabitEthernet 1/0/3
[FW-zone-trust] quit
[FW] firewall zone untrust
[FW-zone-untrust] add interface GigabitEthernet 1/0/1
[FW-zone-untrust] add interface GigabitEthernet 1/0/2
[FW-zone-untrust] add interface GigabitEthernet 1/0/7
[FW-zone-untrust] quit

     

  8. 配置Local到Untrust区域的安全策略，允许FW向目的设备发送相应的健康检查探测报文。 
    配置流量根据链路优先级主备备份

    对于V500R001C80之前的版本，需要在FW上配置对应的安全策略，允许FW向目的设备发送健康检查探测报文。对于V500R001C80及之后的版本，健康检查的探测报文不受安全策略控制，默认放行，无需配置相应安全策略。

    [FW] security-policy
[FW-policy-security] rule name policy_sec_local_untrust
[FW-policy-security-rule-policy_sec_local_untrust] source-zone local
[FW-policy-security-rule-policy_sec_local_untrust] destination-zone untrust
[FW-policy-security-rule-policy_sec_local_untrust] destination-address 3.3.10.10 32
[FW-policy-security-rule-policy_sec_local_untrust] destination-address 3.3.10.11 32
[FW-policy-security-rule-policy_sec_local_untrust] destination-address 3.3.10.12 32
[FW-policy-security-rule-policy_sec_local_untrust] destination-address 3.3.10.13 32
[FW-policy-security-rule-policy_sec_local_untrust] destination-address 9.9.20.20 32
[FW-policy-security-rule-policy_sec_local_untrust] destination-address 9.9.20.21 32
[FW-policy-security-rule-policy_sec_local_untrust] service tcp
[FW-policy-security-rule-policy_sec_local_untrust] action permit
[FW-policy-security-rule-policy_sec_local_untrust] quit

     

  9. 配置Trust到Untrust区域的安全策略，允许企业内网用户访问外网资源。假设内部用户网段为10.3.0.0/24。  
    [FW-policy-security] rule name policy_sec_trust_untrust
[FW-policy-security-rule-policy_sec_trust_untrust] source-zone trust
[FW-policy-security-rule-policy_sec_trust_untrust] destination-zone untrust
[FW-policy-security-rule-policy_sec_trust_untrust] source-address 10.3.0.0 24
[FW-policy-security-rule-policy_sec_trust_untrust] action permit
[FW-policy-security-rule-policy_sec_trust_untrust] quit
[FW-policy-security] quit

     

配置脚本

#
healthcheck enable
healthcheck name isp1_health_01
 destination 3.3.10.10 interface GigabitEthernet1/0/1 protocol tcp-simple destination-port 10001
 destination 3.3.10.11 interface GigabitEthernet1/0/1 protocol tcp-simple destination-port 10002
healthcheck name isp1_health_02
 destination 3.3.10.12 interface GigabitEthernet1/0/2 protocol tcp-simple destination-port 10001
 destination 3.3.10.13 interface GigabitEthernet1/0/2 protocol tcp-simple destination-port 10002
healthcheck name isp2_health
 destination 9.9.20.20 interface GigabitEthernet1/0/7 protocol tcp-simple destination-port 10003
 destination 9.9.20.21 interface GigabitEthernet1/0/7 protocol tcp-simple destination-port 10004
#
interface GigabitEthernet1/0/1
 ip address 1.1.1.1 255.255.255.0
 gateway 1.1.1.254
 bandwidth ingress 50000
 bandwidth egress 50000
 healthcheck isp1_health_01
#
interface GigabitEthernet1/0/2
 ip address 1.1.2.2 255.255.255.0
 gateway 1.1.2.254
 bandwidth ingress 50000
 bandwidth egress 50000
 healthcheck isp1_health_02
#
interface GigabitEthernet1/0/3
 ip address 10.3.0.1 255.255.255.0
#
interface GigabitEthernet1/0/7
 ip address 2.2.2.2 255.255.255.0
 gateway 2.2.2.254
 bandwidth ingress 10000
 bandwidth egress 10000
 healthcheck isp2_health
#
 firewall zone trust
  set priority 85
  add interface GigabitEthernet1/0/3
#
firewall zone untrust
 set priority 5
 add interface GigabitEthernet1/0/1
 add interface GigabitEthernet1/0/2
 add interface GigabitEthernet1/0/7
#
sa
 user-defined-application name UD_tax_system
  rule name 1
   ip-address 8.8.8.8 32
   port 20001
#
interface-group 0 name ifgrp1
 add interface GigabitEthernet1/0/1
 add interface GigabitEthernet1/0/2
#
 multi-interface
  mode priority-of-userdefine
  add interface GigabitEthernet1/0/7
  add interface-group ifgrp1 priority 2
#
security-policy
 rule name policy_sec_local_untrust
  source-zone local
  destination-zone untrust
  destination-address 3.3.10.10 mask 255.255.255.255
  destination-address 3.3.10.11 mask 255.255.255.255
  destination-address 3.3.10.12 mask 255.255.255.255
  destination-address 3.3.10.13 mask 255.255.255.255
  destination-address 9.9.20.20 mask 255.255.255.255
  destination-address 9.9.20.21 mask 255.255.255.255
  service tcp
  action permit      
 rule name policy_sec_trust_untrust
  source-zone trust
  destination-zone untrust
  source-address 10.3.0.0 mask 255.255.255.0
  action permit
#
policy-based-route
 rule name tax_system
  source-zone trust
  application app UD_tax_system
  action pbr egress-interface multi-interface
   mode priority-of-userdefine
   add interface GigabitEthernet1/0/7 priority 2
   add interface-group ifgrp1
#
return
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