SRv6-BE 配置案例详解SRv6Segment Routing over IPv6是一种基于IPv6的源路由技术通过将路径信息编码在数据包头中实现灵活流量调度。SRv6-BEBest Effort是最基础的转发模式以下为典型配置案例及技术要点。拓扑与基础环境假设网络拓扑包含三台设备P1、P2、P3运行IS-IS协议作为IGP设备支持SRv6能力节点SID分配P1: 2001:db8::1/128, SID1P2: 2001:db8::2/128, SID2P3: 2001:db8::3/128, SID3全局SRv6配置segment-routing srv6 locator MyLocator prefix 2001:db8::/64配置步骤以Cisco IOS XR为例设备P1配置router isis 1 net 49.0001.0000.0001.00 address-family ipv6 unicast metric-style wide segment-routing srv6 locator MyLocator interface GigabitEthernet0/0/0/0 ipv6 address 2001:db8:12::1/64 isis enable 1设备P2配置router isis 1 net 49.0001.0000.0002.00 address-family ipv6 unicast metric-style wide segment-routing srv6 locator MyLocator interface GigabitEthernet0/0/0/0 ipv6 address 2001:db8:12::2/64 isis enable 1 interface GigabitEthernet0/0/0/1 ipv6 address 2001:db8:23::2/64 isis enable 1设备P3配置router isis 1 net 49.0001.0000.0003.00 address-family ipv6 unicast metric-style wide segment-routing srv6 locator MyLocator interface GigabitEthernet0/0/0/0 ipv6 address 2001:db8:23::3/64 isis enable 1验证与诊断检查SRv6 SID分配show segment-routing srv6 locator输出应显示各节点的Locator和SID状态为Active。查看IS-IS邻居show isis neighbors确认所有设备间IS-IS邻接关系为UP。测试端到端连通性从P1向P3发起Ping测试ping 2001:db8::3若成功表明SRv6-BE路径生效。关键注意事项MTU调整SRv6头部增加40字节需确保链路MTU≥150040字节。SID冲突全局Locator前缀需唯一避免SID重复。硬件兼容性确认设备线卡支持SRv6硬件转发。通过上述配置可实现基于IGP最短路径的SRv6-BE转发。扩展场景可结合Policy或TE实现更复杂的流量工程。https://github.com/singme1227/qb4_a8vmhttps://github.com/derekmomen/t6f_1mn0https://github.com/squid9lace/8o9_g1ldhttps://github.com/socialzl/bg5_awx8https://github.com/mirelleh/755_nqwc