ccna 120

ccna 120

Router(config-if)#tunnel mpls traffic-eng priority 6 6 Network 1.1.1.1 0.0.0.0 area 0 LDP IP before 4B is when there is a loopback when interfaces, loopback maximum interface IP , if there is no lp interface, is the largest active physical interface IP , use the following command to change: In the cfg-ip-expl-path mode, you can also use the list keyword to view all the next-addresses that have been entered . Use index x next-address to specify the index number of each next- hop IP that has been entered . SystemID Length : Identifies the length of the system ID . A value of 0 indicates a length of 6B , a value of 255 indicates a length of 0 , and other system ID fields may have a length of 1-8 bytes. Experimental configuration Tunnel mpls traffic-eng path-option protect 10 explicit name R2R3R4 Integrated IS-IS configuration ! ! 120s 204 We introduce a new TLV (type 240 ) , known as " Point-to-Point Adjacency State ", if the device does not support the new features include the receipt of TLV of IIH , will ignore this TLV , so you can ensure backwards compatible. High-priority tunnels can preempt resources of low-priority tunnels. Support 0-7 total 8 tunnel priority levels R1#sh mpls traffic-eng topology 1.1.1.1 Then shut down the e0/1 port of R2 : Inter-area IP routing changes; Min unit = 0 bytes,max pkt size = 1500 bytes Holdtime Interface eth 0/2 Mpls traffic-eng router-id loopback0 mpls traffic-eng area 1 Tunnel mpls traffic-eng path-option 10 dynamic *Aug 18 11:31:44.598: There are two types of LSPs : Level1 LSP PDU and Level2 LSP PDU. 75000 State: Oper; Msgs sent/rcvd: 26/22; Downstream Up time: 00:09:33 The tunnel priority ranges from 0 to 7. The smaller the priority, the higher the priority. Complete basic IP configuration (configuration omitted) LDP discovery sources: Fa1/0 LDP Flags: 0x0 Config Parameters: Mpls traffic-eng tunnels Mpls traffic-eng tunnels mpls label range 200 299 *Aug 18 09:06:07.919: version=0, length in words=7 As long as the route prefix is ​​learned locally through the IGP , the route prefix is ​​assigned a label ( locally also assigns a POP label to the direct route ) Extended intermediate system reachability TLV (type 22 ) Verify and view Interfaces: 0 packets, 0 bytes *Aug 18 09:06:07.919: Incoming PathError: *Aug 18 09:06:07.919: LABEL_REQUEST type 1 length 8 : The CLNS address is required even if it only provides routing for IP . Checksum: 0x6FEB Length: 132 R2-PE1#show ip route Remote binding: tsr: 2.2.2.2:0, tag: 200 MPLS is a CISCO proprietary protocol, later IETF borrowed, in IETF is called Tag Switching , can be understood as both a different name when enabled, the protocol used is not the same Mpls ldp igp sync holddown 5000 Tunnel mpls traffic-eng bandwidth 33000 Ip cef Reservable Bandwidth[4]: Traditional TE solutions have the following examples: We define the affinity attribute and mask of the TE tunnel of R1 . Then, when R1 calculates the path for this tunnel , R1 converts the affinity value 0x00000001 into binary,ccna 120, which is configured with the two interfaces of R1 . The two attribute-flags values ​​are compared one by one. Since our mask configuration is 0x00000001 , it is also written as binary, and the mask is 1 bit, which must be matched, so only the R2-R2 link is available. . In the actual network deployment, we can flexibly define the meaning of each bit of the link attribute according to our own needs , and combine the affinity attribute to control and avoid the path selection.