Implementing Frame Mode MPLS参考.ppt

Implementation of Frame Mode MPLS Implementing Frame Mode MPLS The Procedure to Configure MPLS Configure CEF Configure MPLS on a frame mode interface (Optional) Configure the MTU size in label switching Step 1: Configure CEF Configure CEF: Start CEF switching to create the FIB table Enable CEF switching on all core interfaces Configure MPLS on a frame mode interface (Optional) Configure the MTU size in label switching Step 1: Configure CEF (Cont.) Starts CEF switching and creates the FIB table The distributed keyword configures distributed CEF (running on VIP or line cards) All CEF-capable interfaces run CEF switching Monitoring IP CEF Displays a summary of the FIB Step 2: Configure MPLS ona Frame Mode Interface Configure CEF Configure MPLS on a frame mode interface: Enable label switching on a frame mode interface Start LDP or TDP label distribution protocol (Optional) Configure the MTU size in label switching Step 2: Configure MPLS ona Frame Mode Interface (Cont.) Enables label switching on a frame mode interface Starts LDP on the interface Configuring MPLS on a Frame Mode Interface: Example 1 Configuring MPLS on a Frame Mode Interface: Example 2 Step 3: Configure the MTU Sizein Label Switching Configure CEF Configure MPLS on a frame mode interface (Optional) Configure the MTU size in label switching: Increase MTU on LAN interfaces Step 3: Configure the MTU Sizein Label Switching (Cont.) Label switching increases the maximum MTU requirements on an interface, because of additional label header Interface MTU is automatically increased on WAN interfaces; IP MTU is automatically decreased on LAN interfaces Label-switching MTU can be increased on LAN interfaces (resulting in jumbo frames) to prevent IP fragmentation Configuring Label Switching MTU: Example Summary MPLS configuration tasks include configuring IP CEF, tag switching, and setting MTU size. CEF is configured globally. Use the mpls ip command to enable MPLS on an interface level. To set MTU for labeled p