问题描述：
我不清楚配置模板里的桥接vlan的意思，目前vlan内设备访问不了内网服务器
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桥接VLAN在无线配置模板中通常指无线客户端接入后所归属的VLAN，用于将无线流量透明桥接到有线网络中的指定VLAN，实现无线与有线设备在同一二层网络中通信。
根据您描述的问题（MER8300 VLAN设置后无法访问外网，内网可获取IP，GE5 40.1口连接异常），结合桥接VLAN的配置，可能原因如下：
1. **桥接VLAN未正确关联到物理端口**：确保GE5端口已允许该桥接VLAN通过（如配置`port trunk permit vlan X`），且未遗漏该VLAN的三层接口或路由配置。
2. **VLAN接口状态异常**：检查对应桥接VLAN的VLAN-interface是否已创建并处于UP状态（`display interface Vlan-interface X`）。
3. **路由缺失**：若跨VLAN通信，需在三层交换机或路由器上配置到该VLAN网段的路由。MER8300若作为网关，需确认已配置该VLAN的IP地址并启用路由功能。
4. **默认VLAN 1泛洪或环路防护**：如信息提示，建议关闭VLAN 1（undo port permit vlan 1），仅放行必要VLAN，避免广播风暴影响通信。
建议操作：
- 确认桥接VLAN号，检查GE5端口配置是否放行该VLAN。
- 确保该VLAN已创建且接口UP。
- 检查路由表是否包含该VLAN网段的直连或静态路由（`display ip routing-table`）。
- 若MER8300为网关，确认DHCP或网关指向正确。
请人工检查当前VLAN状态及端口配置是否符合上述要求。
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