ccna 4

ccna 4

Link State ID: 2.2.2.2 Advertising Router: 2.2.2.2 LS Seq Number: 8000001F Checksum: 0x580A Length: 60 The way to use static routing is of course the easiest, and the best control, but the scalability is too poor, if there are multiple tunnels, then configuration and maintenance is more troublesome. Router(config)# mpls ldp targeted-hello accept from acl ---------- SNPA is equivalent to the Layer 2 address of NSAP or NET . MPLS does not assign labels to BGP routes, but assigns labels to the next hop of BGP routes. Next-address 10.1.45.5 Priority 2 : 9375000 ! LSPID R3.02-00 Perform routing protocol functions in the routing domain In CISCO IOS routers, IOS cannot automatically allocate bandwidth-based link (interface) metrics. Regardless of the bandwidth of the link, the default IS-IS metric for all interfaces is 10 , of course you can modify it. The maximum metric for a full path is 1023 . Of course, the IETF has extended the default metric . 75000 LSA Ip address 2.2.2.2 255.255.255.255 TOS 0 Metrics: 1 Tu0:403 Interfaces: TE Metric is equivalent to the concept of weight value, note that this is to be distinguished from IGP metric Device Internet segment 10.1.xy.0 / 24 , where xy is the device number, X small y large The loop detection mechanism of LDP depends on the IGP protocol. *Aug 18 04:37:06.243: FILTER_SPEC type 7 length 12: Local binding: tag: 101 SRM and SSM are used to coordinate diffusion and database synchronization *Aug 18 11:26:02.546: Interface Ethernet0/1 Virtual link The final R1 on the show isis database It should be noted here that if a label package is received and the label is 0 , the label will be directly popped up and the data will be submitted to the FIB for searching, and there will be no loss of the search. Label tag with tag 0 , why not just remove the tag (allocate a 13 value to the next hop to let the next hop remove the tag), why keep the tag header with 0 ? This is to maintain the uniformity of network planning under certain circumstances. For example , if QoS of MPLS is deployed , the EXP field in the label package is required, and then a label is required. When QoS is implemented , the last hop must carry the exp bit. Therefore,ccna 4, the label cannot be ejected. You need to configure mpls ldp explicit-null. The label assigned to a specific route is 0 and passed to the LDP neighbor (such as the penultimate hop). .