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  • Modify the configuration of R2 : Path removal ! 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. Configure this feature on the A device (usually on the edge device) no mpls ip propagate-ttl Time since created: 10 minutes, 5 seconds Time since path change: 9 minutes, 49 seconds Default route injection R1#traceroute 6.6.6.6 *Aug 18 04:37:06.239: Router(config-if)#mpls traffic-eng tunnels Now the initial environment, R1 can learn inter-area routes, and R2 locally re - routes to level 1 route 2.2.2.0 . Of course, since R2 sets the attached-bit , R1 also generates a default route to R2 . Mpls traffic-eng tunnels ip rsvp bandwidth The maximum number of regional addresses configured by a single router must be the same as that of neighboring neighbors. By default, CISCO IOS routers support the maximum number. Average rate = 250000 bytes/sec, burst depth = 1000 bytes Remote binding: tsr: 2.2.2.2:0, tag: 201 Fast tag rewrite with Fa0/0, 10.1.34.3, tags commit: {303} via 10.1.15.5, 0 dependencies, recursive 10.1.23.0/24 FRR intf/label Use the lockdown keyword (note that the above configuration is configured in the TE tunnel port). L2 router Link connected to Broadcast network Link ID : 10.1.12.2 Supports allocating network resources for explicit LSP tunnels Record Route: 10.1.34.3 10.1.13.1 Configure on R2 as follows: The configuration of R4 is as follows: Interface fast1/0 Each LSP has a maximum expiration time ( MaxAge ) in the LSDB . If this time expires, if no new LSP is received. RFC 2763 P2P Links: Multiacces Links: LSPDB Run IS-IS on the entire network to announce direct connection and loopback interface. Area Address(es): 49.0001 SNPA: cc03.1ab0.0000 Mpls traffic-eng tunnels ip rsvp bandwidth *Aug 18 09:06:07.919: In this way, B receives a label packet with a label value of 22 sent by A ,ccna networking course, and pops the label to obtain an IP packet, and then forwards it to C , and then C only needs to search and forward the FIB table of the IP packet . By default TE metric equal to the IGP Metric (This means that, without using the above command interface disposed in the physical, TE metric equal to the IGP Metric ) MPLS TE Redistribute connected level-1 Network 3.3.3.3 0.0.0.0 area 0 IS-IS adjacency on a multi-access link ! Ip cef Net 49.0001.0000.0000.0001.00 Mpls label rangempls label range 400 499 interface fa0/0 RFC 2370 describes an extension of OSPF that defines three new LSAs . These LSAs are called sluggish LSAs ( opaque LSAs ) and their differences are limited to the extent of propagation. These LSAs can accurately provide the information required by MPLS TE to OSPF : Based IP traffic engineering is connectionless, not an explicit path ( Explicit routing ) 75000 LSP Seq Num INIT 22 MPLS TE of AutoRoute characteristics of the TE tunnel as a direct link participating SPF calculation (except R2 themselves) The process of exchanging LSPs by routers in an area is called flooding . The LSPs received from neighboring routers in the area are stored in the local router. RESV Can see outbound PATH and inbound RESV messages Regarding the priority of the tunnel and the verification of the currently available bandwidth: First , the configuration of the tunnel is as follows: OAM is basically used for error detection, location, and monitoring implementation. This tag distinguishes between ordinary messages and OAM messages. CISCO IOS does not use tag 14 , which performs MPLS OAM but is not implemented by tag 14 . Link connected to Broadcast network Link ID : 10.1.12.2 ISO10589 defines how to establish a through Level2 backbone of Level1 to repair a quarantined routing Level1 area. This is mainly achieved by electing a level2- capable router in each area as the area-specified level 2 IS and establishing a special adjacency relationship called virtual adjacency or virtual link between the areas. The configuration of R3 is as follows: Tunnel: ! *Aug 18 09:06:07.919: average rate=250000 bytes/sec, burst depth=1000 bytes State: Oper; Msgs sent/rcvd: 13/13; Downstream Up time: 00:03:47 Tunnel priority Remote binding: tsr: 2.2.2.2:0, tag: imp-null tib entry: 10.1.13.0/24, rev 8(no route) *Aug 18 04:37:06.239: SENDER_TEMPLATE type 7 length 12: Label or VC Do not advertise routes re-published from other routing protocols We complete the experiment as long as the R2 and R4 configuration domain-password can, Rl is a zero-configuration ( Domain Authentication actually level2 LSP embedded for authentication TLV ). MPLS coding FastEthernet0/0, Src IP addr: 10.1.12.2 Addresses bound to peer LDP Ident: The configuration of R1 is as follows (other basic configurations are omitted directly): 104 Interface fast 0/0 The label header has a total of 32 bits and contains the following fields: Outgoing Label Ip address 10.1.123.1 255.255.255.0 Record Route: NONE Next, R3 receives the tag package. Similarly, look at your own LFIB : 300 The interface of each router activates RSVP and MPLS TE tunnel support. Level2 , using the interface level command: isis circuit-type level2 , then R2 and R3 will not advertise these direct links when advertising LSPs in area 49.0001 . So the routing table for R1 becomes: Label 1 router warning label [Note] If the router receives a tagged packet and the top tag cannot be found in the local LFIB , the CISCO IOS will discard it. AutoRoute: disabled LockDown: disabled Loadshare: 33000 auto-bw: disabled Both data packets have the same format and each carry a collection of LSP summary information. The difference is that the CSNP carries summary information of all known LSPs in the link state database of the router , and the PSNP carries one of the subsets. To distinguish Level-1 , Level-2 link state database, the router generates Ll , L2 of independent SNP packets. 203 Ip unnumbered Loopback0 tunnel mode mpls traffic-eng tunnel destination 5.5.5.5 Ip address 1.1.1.1 255.255.255.255 Access-list 1 permit 3.3.3.3 We found, R2 external routing re-released locally gone; R2 from level2 injection level1 of inter-area routes are gone; while R2 can not be used as R1 next hop of the default route. There is only one R2 local direct connection 24.0 route. Fa0/0 1.1.1.1/32 Network 3.3.3.3 0.0.0.0 area 0 basic configuration Local The configuration of R3 is as follows: 5.5.5.5 Network 10.1.12.1 0.0.0.0 area 0 State: Oper; Msgs sent/rcvd: 112/112; Downstream Up time: 01:29:44 17 The configuration of R1 is as follows: Backbone , so R2 can learn. At this time, I had a whimsy, and I made a level2 route to the level1 route re-release on R2 and found that RSVP-TE requests to establish an LSP tunnel according to the above path. 10.1.45.4 Next, you can test the forwarding of traffic on R1 . Link State ID: 2.2.2.2 Advertising Router: 2.2.2.2 LS Seq Number: 80000011 Checksum: 0xAE93 Length: 72 3.3.3.3 Router isis ! Interface eth 0/2 Used to publish a complete link state database on a router , CSNP is used to inform other routers of their own database may be outdated or lost LSP . Intermediate system adjacent router Mpls traffic-eng router-id loopback0 mpls traffic-eng area 0 R1 from eth0/1 to R5 , cost=20+1=21 of this path This command will cause the tail router to advertise implicit empty labels. (default action notification explicit empty label) IS-IS basic module Basic experiment 1 *Aug 18 11:26:02.546: Interface loopback1 Interface Tunnel0 Path: valid *Aug 18 11:31:44.598: The configuration of R4 is as follows: i ia 10.1.24.0 [115/148] via 10.1.123.2, FastEthernet0/0 i ia 10.1.45.0 [115/158] via 10.1.123.2, FastEthernet0/0 i ia 10.1.34.0 [115/158] via 10.1.123.2 , FastEthernet0/0 C 10.1.123.0 is directly connected, FastEthernet0/0 Generating a pseudo-node, node action by the pseudo-elections DIS play 3.3.3.3/32 Basic Experiment 2 ( IS-IS ) Located in the backbone area 1.3 OSI protocol stack terminology Interface Tunnel0 BoS All routers in a zone must have the same zone ID 304 ! " MPLS technology architecture."! There have been a lot of talks about ATT-bit before, so I won't be embarrassed here. I have tested on CISCO IOS Version 12.4(10) -- C3640-JK9O3S-M . On R1, which is L1 router , with default-information originate , I can't generate default route. Set the synchronous holddown timer to 5S , so that after 5S times out, R1-R4 establishes the OSPF adjacency. Ip address 10.1.45.4 255.255.255.0 *Aug 18 09:06:07.919: Minimum Path Bandwidth (bytes/sec): 2147483647 ! Ip address 10.1.34.4 255.255.255.0 0/0/0 0 packets, 0 bytes When the router alarm tag is at the top of the stack, it warns the LSR that the message requires special attention. In this way, the message will not be transmitted through hardware, but will be transmitted through the software process. Once the start of a message is forwarded, the label 1 is first removed, the next LSR in the LFIB label stack the next tag is then performed to find the corresponding label operations ( add, remove, exchange ) , tag 1 will It is added to the top of the label stack and finally forwarded.

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CCNA Routing And Switching 200-125 Written Dumps

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Exam Code: 200-125

Certification Provider: Cisco

Certification Exam Name:CCNA Routing & Switching

Update Date: Dec 08,2021

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