LSR处理报文过程:
1)ingress
ingress设备通过查看FIB表中tennel ID值不为0X0的表项,能够获得FTN的详细信息
ingress节点:收到IP报文后,根据报文解封装特点,查询到FIB表,根据FIB的tunnel-id,查询LFIB入向的封装信息
static-lsp ingress tunnel destination 192.168.1.0 24 nexthop 10.1.0.2 out-label 100
注意:tunnel是FIB表提供的
destination:FEC(等价类)
2)transtit
transit节点:收到标签报文,查询LFIB,根据LFIB里面的信息转发
static-lsp transit tunnel incoming-interface GigabitEthernet 0/0/0 in-label 100 nexthop 10.1.1.3 out-label 200
注意:incoming-interface:入接口
3)egress
egress节点:收到标签报文,去掉标签,查询FIB转发
static-lsp egress tunnel incoming-interface GigabitEthernet 0/0/0 in-label 200
注意:incoming-interface:入接口
标签:incoming,tunnel,报文,mpls,label,FIB,工作,interface,过程 From: https://blog.51cto.com/u_13560030/7062142