在官方给出的trunk口配置时,同时需要指定untagged的access口,如下图: 但如果是一台24口交换机,ether1-ether12电口端口都是access vlan 200,ether13-ether24电口端口都是access vlan 300,trunk到sfp1端口,这样配置vlan trunk就很繁琐,其实在RouterOS可以简化trunk配置如下: 创建bridge1,启用vlan-filtering=yes /interface bridge add admin-mac=xx:xx:xx:xx:xx:xx auto-mac=no name=bridge1 vlan-filtering=yes 将sfp1和ether1-ether24加入bridge1 /interface bridge port add bridge=bridge1 interface= sfp1 add bridge=bridge1 interface=ether1 pvid=200 add bridge=bridge1 interface=ether2 pvid=200 add bridge=bridge1 interface=ether3 pvid=200 …(省略) add bridge=bridge1 interface=ether12 pvid=200 add bridge=bridge1 interface=ether13 pvid=300 …(省略) add bridge=bridge1 interface=ether24 pvid=200 配置sfp1的trunk “/interface bridge vlan add bridge=bridge1 tagged= sfp1 vlan-ids=200,300” 这样的配置是错误的,新版本的RouterOS,在多VLAN trunk的时候,会提示“port with pvid added untagged group which might cause problems,consider adding a seperate vlan entry”  这个是因为多VLAN trunk可能会导致access端口VLAN的透传,官方不建议这样的配置,修正如下: /interface bridge port add bridge=bridge1 interface= sfp1 frame-types=admit-only-vlan-tagged ingress-filtering=yes add bridge=bridge1 interface=ether1 pvid=200 frame-types=admit-only-vlan-tagged ingress-filtering=yes add bridge=bridge1 interface=ether2 pvid=200 frame-types=admit-only-vlan-tagged ingress-filtering=yes add bridge=bridge1 interface=ether3 pvid=200 frame-types=admit-only-vlan-tagged ingress-filtering=yes …(省略) add bridge=bridge1 interface=ether12 pvid=200 frame-types=admit-only-vlan-tagged ingress-filtering=yes add bridge=bridge1 interface=ether13 pvid=300 frame-types=admit-only-vlan-tagged ingress-filtering=yes …(省略) add bridge=bridge1 interface=ether24 pvid=200 frame-types=admit-only-vlan-tagged ingress-filtering=yes   /interface bridge vlan add bridge=bridge1 tagged= sfp1 vlan-ids=200 add bridge=bridge1 tagged= sfp1 vlan-ids=300