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MPLS TROUBLESHOOTING TIPS FOR CISCO AND JUNIPER #mpls #cisco #juniper #troubleshooting #huawei #copy #tutorial Basic MPLS Troubleshooting Tips 1. Verifying MPLS Configuration: Cisco: Use  show mpls interfaces  to verify that MPLS is enabled on the correct interfaces. Check  show mpls ldp neighbor  to ensure that Label Distribution Protocol (LDP) neighbors are discovered, and that the session is up. Juniper: Use  show mpls interface  to check MPLS status on interfaces. Utilize  show mpls ldp session  to confirm LDP neighbor sessions. 2. Checking Label Switch Paths (LSP): Cisco: Use  show mpls ldp bindings  to display local and remote label bindings. show mpls forwarding-table  helps to inspect the labels being forwarded and their corresponding next-hops. Juniper: Use  show mpls lsp extensive  to get detailed information about the LSPs. show route table mpls.0  to view the label-switched routes. 3. Ensuring Proper Route...

  OSPF Multi-Area Configurationg We will use the following topology: Above we have R1 and R2 in area 0, the backbone area. Between R1 and R3, we will use area 1 and between R2/R4 we will use area 2. R3 and R4 have a loopback interface with an IP address that we will advertise in their area. Configuration Let’s start with all network commands to get OSPF up and running. The network command defines to which area each interface will belong.First, we will configure R1 and R2 for the backbone area: R1(config)# router ospf 1 R1(config-router)# network 192.168.12.0 0.0.0.255 area 0 R2(config)# router ospf 1 R2(config-router)# network 192.168.12.0 0.0.0.255 area 0 Let’s configure R1 and R3 for area 1: R1(config)# router ospf 1 R1(config-router)# network 192.168.13.0 0.0.0.255 area 1 R3(config)# router ospf 1 R3(config-router)# network 192.168.13.0 0.0.0.255 area 1 R3(config-router)# network 3.3.3.3 0.0.0.0 area 1 And last but not least, R2 and R4 for area 2: R2(config)# router ospf 1 ...

  Overview of OSPF Definition The Open Shortest Path First (OSPF) protocol, developed by the Internet Engineering Task Force (IETF), is a link-state Interior Gateway Protocol (IGP). At present, OSPF Version 2, defined in RFC 2328, is intended for IPv4, and OSPF Version 3, defined in RFC 2740, is intended for IPv6. Unless otherwise stated, OSPF stated in this document refers to OSPF Version 2. The following describes OSPF fundamentals, and basic OSPF function configuration. Understanding OSPF OSPF Fundamentals Router ID A router requires a router ID if it is to run OSPF. A router ID is a 32-bit unsigned integer, uniquely identifying a router in an AS. A router ID can be manually configured or automatically selected by a router: It is recommended that you manually configure a router ID to ensure OSPF stability. If no router ID is manually configured for a router, the router selects an interface IP address as its router ID. A router selects its router ID based on the following rules: ...