cisco online test

cisco online test

Is a sequence of LSRs that switch a labeled packet through an MPLS network or part of an MPLS network. 10.1.12.1 10.1.12.2 4 msec 0 msec 4 msec The configuration of R5 is as follows: Then on R1 to see the tunnel , his TE metric becomes 102 . * 0x0000000C CSPF ( Constrained Shortest Path First ) SPF algorithm with constraints Physical_bw: 100000 (kbps), max_reservable_bw_global: 75000 (kbps) ! OutLabel : Ethernet0/0, 204 RSVP Signalling Info: Tunnel mpls traffic-eng autoroute announce tunnel mpls traffic-eng priority 7 7 Link ID:: 1 Pay attention to the distinction between autoroute and here . The autoroute feature is not activated in our configuration above . Autoroute feature and autoroute Link state information IGP itself supports Hello data unit: sent periodically to determine whether other ISs are running IS-IS , establish adjacencies, exchange LSPs , and synchronize LSDBs . *Aug 18 09:06:07.919: ! The output of the CSPF algorithm is an IP interface address sequence (next hop router address) between the two endpoints of the tunnel . Copy this value. LDP Id: 2.2.2.2:0 // 2.2.2.2 is router-id ; 0 is label gap Therefore, the main functions of RSVP are: Now let's consider another scenario. Suppose we add a physical connection between R1 and R5 . In order to facilitate the experiment, I directly pull a line between R1 and R5 . Everyone has the right to have multiple routers in this new path. Play the imagination and kiss: Ip address 3.3.3.3 255.255.255.255 ISIS in NBMA environment Network 10.1.12.1 0.0.0.0 area 0 Network 10.1.12.1 0.0.0.0 area 0 R3 to 304 replace 404 . Note that both 304 and 404 are RSVP- assigned tags, so we should still pay attention to the tunnel when viewing the tags . The above table entry, 2.2.2.2 0[5] , be careful not to make a mistake, not the label corresponding to the prefix 2.2.2.2 , but the label corresponding to this tunnel . Interface loopback0 // The label advertised locally is meaningful to the local ( interface ) or globally Reference book Set the command: Equivalent load balancing in CEF Ip address 10.1.23.2 255.255.255.0 By selection ( level2 routing) Router bgp 2345 Router-id 3.3.3.3 Interface fast0/0 Each tag mapping message contains two elements : FEC TLV and Label TLV 20bits Tag rewrite with Fa0/0, 10.1.34.3, tags imposed: {303} * 0x0000000F Bytes tag switched Local Interface eth 0/0 Area-password cisco FastEthernet0/0, Src IP addr: 10.1.12.2 Addresses bound to peer LDP Ident: Addresses bound to peer LDP Ident: To add: In the above environment, the loopback interface cost=1 , and the cost of all other physical interfaces =10 . Then if we configure: R1 , R2 , and R3 run OSPF to advertise direct connection and their own loopback interface. And LDP is activated on the straight connector . Now is a normal situation, Router(config)#interface tunnel x This configuration is suitable for situations with explicit session endpoints. Tunnel mode mpls traffic-eng tunnel destination 5.5.5.5 The sub-TLV of 0-244B is mainly used for MPLS TE. This can be area at any level within the router adjacency relationship; may be other area adjacent L2 or L1 / L2 router forming L2 *Aug 18 09:06:07.919: 10.1.24.4 (Strict IPv4 Prefix, 8 bytes, /32) Ip router isis encapsulation frame-relay isis priority 100 In this way, when R2 forwards the label data, the data is pushed into the two-layer label, the outer layer is the TE tunnel label 304 ,cisco online test, and the inner layer is the VPNv4 label 505. After the label is added to the R3 , the R3 pops the top label, and then the data is Forwarded to R4 , but it is stupid when it comes to R4 , because the 505 tag is generated by R5 , R4 does not know the 505 tag, so it loses the packet.