ccna test prep online

ccna test prep online

Label Mapping message Interface loopback0 Ip address 10.1.23.3 255.255.255.0 *Aug 18 04:37:06.243: STYLE type 1 length 8 : TOS 0 Metrics: 65535 The configuration of R3 is as follows: The PATHTear packet is similar to the PATH except that it is sent when the TE tunnel LSP created by the headend router needs to be removed . For example,ccna test prep online, the tunnel interface is manually shut down . *Aug 18 11:31:44.598: Area Address: 49.0001 *Aug 18 11:31:44.598: *Aug 18 04:37:06.239: Path Latency (microseconds):0 Network 10.1.45.5 0.0.0.0 area 0 We have found, R6 originating packet is IP , to the R4 , R4 check CEF table, the destination found: 5.5.5.5 entry is associated with a the Label : 303 , then R4 will IP over cladding pressure tab 303 , and then lost Give the next hop 10.1.34.3 which is R3 . The following is the CEF entry for R4 : Here is a point to note, we look at the E router, in fact, it will receive the label binding of its own LDP neighbor B and C , which has a label about the route X bundle, then E is stored in its own LFIB table. Which neighbor's remote label is it? The answer is C , because C is the next hop of the E router to X , and E will use the routing table to determine who's label bundle is "better". 2.2.2.2 Router(config)#ip explicit-path name ccietea Let's take a look at the routing table for R1 : Ip address 1.1.1.1 255.255.255.0 ip router isis Ip address 10.1.34.3 255.255.255.0 Ip router isis Conservative mode : Conservative Retention MPLS LDP-IGP synchronization is enabled in the IGP process and applied to all interfaces running the IGP . LSP Holdtime Bandwidth , latency , policy constrains RFC1195 In this environment, all physical interfaces OSPF cost = 10 , Loopback port cost = 1 10.1.34.4 Type 1 length 8 : AutoRoute basic configuration We open interface authentication between R1 and R2 : Event caused reoptimize Pop Label Type 10 flooding range only in this area Area address A very important problem in MPLS networks is the synchronization of LDP and IGP . The so-called synchronization means that both IGP and LDP recognize that a link is the outbound link of the message to be forwarded . For example, in the above figure, all four routers run OSPF and activate LDP . Then on R1 , if it goes to the route 3.3.3.3/32 , the next hop in the routing table is R2 (assuming we adjust the cost ), and at the same time we receive the bundle of 3.3.3.3/32 prefix sent by R2 . The label 401 , then IGP and LDP are synchronized at this time, and R1 can normally use R2 as the next hop to forward MPLS label messages.