MPLS基本概念.pptVIP

标签分发用tcp * * * 高IP初始化 * ３步走 * 人人为我，我为人人 * * * 默认使用loop ip地址 默认会使用loop ip会作为Mpls id Trace并不能真实反应网络的连通情况,可以使用 Cisco只支持出方向的标签过滤 华为只支持入方向的标签过滤(现在可以in和out都可以) * * * Force:两个设备之间如果已经建立的ldp neighbor,那么改变router-id不会生效,force会强行改变邻居关系,重新建立邻居关系 Config#Mpls label range 200 可以限制label分发范围,便于标签追踪使用 * * * * * * * Mpls mtu是针对于mpls mtu的 物理结构mtu针对接口数据包的 * * * * 标签acl For to For acl=给这个邻居哪些条目的标签 To acl= 给哪些邻居 在cisco设备上,要想实现mpls ldp-labels 必须先no mpls ldp-labels 实际上就是限定label的范围 * * * * * * * * * * Conditional Label Distribution Configuration: Example The customer is already running IP infrastructure. MPLS is needed only to support MPLS VPN services: Labels should be generated only for loopback interfaces (BGP next hops) of all routers. All loopback interfaces are in one contiguous address block (192.168.254.0/24). ip cef ! interface serial 0/0mpls ip! interface serial 0/1 mpls ip ! interface ethernet 1/0 mpls ip Conditional Label Distribution Configuration Steps Step 1: Enable CEF and label switching. ip cef mpls ip mpls ip mpls ip Conditional Label Distribution Configuration Steps (Cont.) Step 2: Enable conditional label advertisement. ! ! Disable default advertisment mechanism ! no mpls ldp advertise-labels ! ! Configure conditional advertisments ! mpls ldp advertise-labels for 90 to 91 ! access-list 90 permit ip 192.168.254.0 0.0.0.255 access-list 91 permit ip any no mpls ldp advertise-labels mpls ldp advertise-labels for 90 to 91 ! access-list 90 permit 192.168.254.0 0.0.0.255 access-list 91 permit any ? 2004 Cisco Systems, Inc. All rights reserved. MPLS监测命令 MPLS v2.1—3-* show mpls ldp parameters Router# Displays LDP parameters on the local router. MPLS Monitoring Commands show mpls interfaces Router# Displays MPLS status on individual interfaces. show mpls ldp discovery Router# Displays all discovered LDP neighbors. MPLS Monitoring Commands:show mpls ldp parameters Protocol version: 1 Downstream label pool: min label: 16; max label: 100000 [Configured: min