latest cisco ccna exam

latest cisco ccna exam

AutoRoute: disabled LockDown: disabled Loadshare: 33000 auto-bw: disabled R1#show ip cef 4.4.4.4 Some SPFs are restricted for inter-domain and external routing, and any inter-domain link turbulence caused by smaller areas and hierarchical topology extensions leads to complete ! Router-id 1.1.1.1 PSNP The status of IP traffic engineering Kbps (Global) Priority: 7 7 Affinity: 0x0/0xFFFF Frame-relay map ip 10.1.123.2 201 broadcast R3.00-00 Manually reoptimize *Aug 18 04:37:06.239: min unit=0 bytes, max pkt size=2147483647 bytes !! Neighbor's SNPA , the interface MAC of the other party in the LAN Interface eth 0/1 Network 10.1.45.5 0.0.0.0 area 0 Complete basic IP configuration (configuration omitted) This packet. RESV response PATH message, to establish and maintain LSP passage How labels are handled Just throw the next hop of the traffic that meets the conditions to the tunnel interface. NSAP address to host name mapping Ip unnumbered Loopback0 tunnel destination 5.5.5.5 tunnel mode mpls traffic-eng The actual CLNP data is encapsulated in the CLNP header and then encapsulated in Layer 2. Hello data unit: sent periodically to determine whether other ISs are running IS-IS , establish adjacencies, exchange LSPs , and synchronize LSDBs . Which table is specifically checked depends mainly on the Layer 2 encapsulation of the received data. For example, if the Layer 2 encapsulation is Ethernet (data frame), look at the value of the Type / Length field of the frame header : Outgoing Interface eth 0/0 Ip cef O Tunnel mpls traffic-eng autoroute metric absolute resolution if the configuration of R2 is changed to: Mpls traffic-eng tunnels mpls label range 400 499 0/0/0 The configuration of R2 is as follows: Network 10.1.23.2 0.0.0.0 area 0 mpls traffic-eng router-id Loopback0 mpls traffic-eng area 0 Destination-based load balancing is actually achieved by HASHing the destination and source IP addresses . In other words, it is actually based on source and destination address pairs for load balancing. State: Oper; Msgs sent/rcvd: 13/13; Downstream Up time: 00:03:47 Length Phenomenon and troubleshooting Label 3 implicit null label 0x0000000E lab environment Path: valid PATH 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 : Interface eth 0/0 In the above figure, R1 ,latest cisco ccna exam, R2 , and R3 run OSPF , and the direct connection and loopback are announced . The loopback is addressed to xxxx/32 , and x is the device number. At the same time, all direct interfaces activate LDP . Ip unnumbered Loopback0 tunnel destination 5.5.5.5 tunnel mode mpls traffic-eng Packets with the same processing mode according to the process or IP DSCP field When the router initiates IIH , the circuit type in the header is set according to the configuration we have made : L1 , L2 or L1-2 . ES-IS 10.1.12.2 It can be seen that ES-IS plays a role in the CLNS network environment as if the ICMP , ARP and DHCP protocols in the IP network work together. TOS 0 Metrics: 65535 Te use TE metric default is this Interfaces: L1/L2 router is usually located on the area boundary Ip cef Ip address 3.3.3.3 255.255.255.255 [115/10] via 10.1.123.2, FastEthernet0/0 LSP Seq Num Tspec: ave rate=2000 kbits, burst=1000 bytes, peak rate=2000 kbits RFC 3373 !! Outbound label 201 , which is given by R2 Do not need to explain it again? At R4 , R4 pops the top label and forwards the packet to R5. Find a LFIB , LFIB has the next hop information, so the top label is popped up and then handed over to the next hop without having to look up the FIB table again (if the label is popped, it is an IP packet). Now create a tunnel on R1 : After the above configuration is complete, R2 will send LDP through the tunnel that has been established and reaches R4 . Note that the tunnel must activate the MPLS IP. *Aug 18 09:06:02.699: Flags: (0x7) Local Prot desired, Label Recording, SE Style !! Flags are reflected in the flag *Aug 18 11:31:44.598: Router(config)# mpls ldp neighbor xxxx labels accept acl Pop tag Local binding: tag: 101 Network 10.1.45.4 0.0.0.0 area 0 Interface Ethernet0/0 RFC1195 When the LDP router from his LDP received from the neighbor label bundled neighbors, it will be bundled with the results stored in its own LIB table, LIB table has local label , which is distributed to its own specific routing prefixes label, Remote label it Is the label that the neighbor distributes for this route prefix. The LDP router will place the remote label assigned by the neighbor in the LIB , but will only select a possible outbound label from all possible labels in the LIB to be placed in the LFIB . The LDP router forms a LFIB table according to the LIB table and the routing table, as shown in the LFIB table of A in the above figure .