ccna certification question paper

ccna certification question paper

That is the CEF table LDP non-directly connected neighbors TE with Layer3 Flags: 0x0 Is a sequence of LSRs that switch a labeled packet through an MPLS network or part of an MPLS network. MPLS label header. At the same time, the header of the Layer 2 data link layer will be instructed accordingly. For example, the Ethernet data frame, the TYPE field of the MAC layer indicates whether the upper layer data is an mpls label frame (if it is an IPv4 packet, the value is 0x0800 , if it is a label packet) Then it is 8847 -unicast or 8848- multicast) The CEF entry indicates that to go to 4.4.4.4 , the IP packet needs to be stamped with a value of 203 ,ccna certification question paper, and then the packet is dropped to the next hop 10.1.12.2 and thrown out from the Fa0/0 port. 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, Network 5.5.5.5 0.0.0.0 area 0 *Aug 18 09:06:07.919: average rate=250000 bytes/sec, burst depth=1000 bytes 968 Experimental configuration Phenomenon observation ----------- Consider in detail the details of the adjacency relationship establishment process: By default, Cisco IOS starts both L1 and L2 operations on the IS-IS router . If you want to specify the router as only the area router or trunk router , use the router configuration mode: R3#show mpls forwarding-table Mpls traffic-eng tunnels mpls label range 400 499 Network 6.6.6.6 0.0.0.0 area 0 From which interface a tag packet is received, as long as it has this tag, it will be exchanged. Object name ! ! 301 1800s , and is a fixed value ! 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 . With PHP's penultimate hop pop-up mechanism, C allocates POP labels for local direct-connected prefixes and advertises them to other LDP neighbors. 10.1.45.4 10.1.45.5 All interconnected IPs are shown Election DIS . In this network, the DIS will generate and flood the new pseudo-node LSP on each of the routing layers it participates in (whether L1 or L2 ) and on each LAN it is connected to . Each router on the LAN establishes adjacency with all other routers and DISs , and does not elect to back up the DIS router. The elected DIS does not guarantee that it will always be DIS . Choose the path with the largest " minimum available bandwidth " Routing information diffusion and database synchronization Debug information on R1 Extended IP reachability reachability TLV (type 135 ) The tag value is 1 , and this tag can appear anywhere on the tag stack, except for the bottom of the stack. 1/0/0 TE metric is a parameter used to build a TE topology that is completely different from the IP topology (although by default it is equal to IGP metric ) 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 i*L1 0.0.0.0/0 [115/10] via 10.1.123.3, FastEthernet0/0 Locally assigned labels are distributed to neighbors, and if there are multiple connections to a single neighbor, the label is valid on all connections. Then regardless of local All routers in the LAN advertise their own connectivity to the pseudonodes in their LSPs (the adjacency relationship between themselves and the pseudonodes) I have already said it above. The configuration of R3 is as follows: When using the Explicit method to establish a tunnel , you need to associate an explicit path . Each transport layer entity is assigned an NSAP address. The NSAP address is the network layer address of the CLNS packet . It is used to identify the device. It consists of an initial domain part ( IDP ) and a domain-defined part ( DSP ). These two parts are detailed below, let us understand this. After the basic configuration is completed, since R2 and R3 are L1\L2 routers , for both of them, they will advertise themselves to the local level1 area as a way to go out , by setting ATT in the LSP generated by themselves . we R1 point of view isis database has been able to see out. R1#show isis database 0x00000037 MC !! Only one interface activates MPLS TE Redistributing via isis Router(cfg-ip-expl-path)#next-address 10.1.25.5 Router(cfg-ip-expl-path)# *Aug 18 11:31:44.598: Next-address 10.1.23.3 (Link ID) Designated Router address: 10.1.12.1 (Link Data) Router Interface address: 10.1.12.2 Number of MTID metrics: 0 Ip router isis *Aug 18 11:31:44.598: Verify view R1#sh mpls for Through the above command, you can view the actual forwarding outbound interface and the next hop of the packet whose source is 10.1.35.5 and whose destination is 1.1.1.1 on R3 . We can see that the traffic of this source address is actually used. One hop is 10.1.34.4 , and the outgoing interface is F1/0 port. That is to say, as long as it is from 10.1.35.5 , the traffic to 1.1.1.1 is constant, and the Fa1/0 port is constantly taken out.