what is the latest ccna exam

what is the latest ccna exam

Mpls traffic-eng tunnels ip rsvp bandwidth *Aug 18 11:26:02.546: Router ospf 1 Mpls traffic-eng tunnels ip rsvp bandwidth ! Router-id 1.1.1.1 Ip address 10.1.56.6 255.255.255.0 Reservable Bandwidth[3]: Activate RSVP on the interface and configure reserved bandwidth (optional) Can quickly converge when the network fails Network 55.55.55.55 area 0 Activate record route , which can make the PATH and RESV messages carry the record route object, record the IP passing along the tunnel , and can play a certain anti-ring effect. Of course, there are other important functions, which will be explained later. MPLS TE tunnel Interface fa0/0 0/0/0 *Aug 18 11:31:44.598: 10.1.34.0/24 *Aug 18 11:31:44.598: Type-10 Opaque Link Area Link States (Area 0) LSP ( LinkState Protocol Data Unit ) format Age Router-id 4.4.4.4 i ia 10.1.24.0 [115/148] via 10.1.123.2, FastEthernet0/0 tunnel interface can be configured directly IGP Metric , for example, if the running OSPF , directly in the tunnel configuration mouth ip ospf cost can This will result in the OL bit of the LSP generated by R2 , and the result seen on R1 is this: Ip address 10.1.45.4 255.255.255.0 RESV The configuration of R1 is as follows: Next Hop The interface will be created. We just need to put the traffic into the tunnel port, there are still a lot of methods, we will continue to introduce in the following content. Ip cef Next, R2 receives the tag packet. R2 knows that this is a tag packet from the type field of the Layer 2 Ethernet frame header of this packet, so it looks for its own LFIB table: Neighbor 5.5.5.5 update-source Loopback0 The loopback0 address of all devices is xxxx/32 , and x is the device number. 0 kbits/sec The forwarded keyword indicates that this command is valid for traffic traversing the router. The Local keyword indicates that the traffic generated locally is effective. Static Routing Static Route [7]: 55000 kbits/sec Mpls ldp igp sync holddown msecs Router-id 4.4.4.4 Reservable Bandwidth[2]: The previous experiment used IBGP to establish IBGP adjacency on R1 and R4 to help you understand the MPLS environment. Start LSP ID : Start LSP ID . Indicates the first LSP ID of the LSP range described in the TLV field . Look again at R4 's isis database : Mpls traffic-eng tunnels ip rsvp bandwidth All Layer 2 routers must have a unique system ID within the domain Primary lsp path: 10.1.12.1 10.1.12.2 Basic knowledge point !! ldp 's routerid uses loopback port IP R1# Bw-based Network 2.2.2.2 0.0.0.0 area0 LDP ID LSP tunnel is one-way Route-map test permit 10 router isis *Aug 18 11:26:02.546: Router(config)# mpls ldp discovery holdtime seconds RSVP messages have a common header followed by one or more Objects Interface eth 0/1 558 *Aug 18 09:06:07.919: 10.1.23.3 i*L1 0.0.0.0/0 [115/10] via 10.1.123.3, FastEthernet0/0 0 kbits/sec Clear text area certification 10.1.12.2 Route Distinguisher: 2345:6 Let us verify it now. Local R2.02 LSP overview Set-overload-bit Mpls traffic-eng router-id loopback0 mpls traffic-eng area 0 Router(config)# mpls ldp targeted-hello accept from acl *Aug 18 11:31:44.598: Network 10.1.23.3 0.0.0.0 area 0 !! ldp 's routerid uses loopback port IP IGP Neighbor: ID 10.1.23.2 Or Tunnel Id OSPF 's LSA Device Internet segment 10.1.xy.0 / 24 , where xy is the device number, X small y large Frame-relay map ip 10.1.123.1 201 broadcast The LFIB table does not contain inbound interface information. *Aug 18 09:06:07.919: 5.5.5.5 (Strict IPv4 Prefix, 8 bytes, /32) Take it. The re-addressing process is similar to zone merging and separation, except that during re-addressing, some or all of the router's zone prefixes need to be cleared, with new ones. Next, R2 receives the tag packet. R2 knows that this is a tag packet from the type field of the Layer 2 Ethernet frame header of this packet, so it looks for its own LFIB table: Then, OSI routing begins. When an ES wants to send a packet to another ES , it sends the packet to its directly connected network. This will cause R2 to calculate the route, from the tunnel0 port to the 5 and 55 route metric becomes 32+1=33 , which is greater than the metric=31 of the route taken from e0/1 . So the routing table of R2 has changed, and the routes of the 5 and 55 network segments have become: Router-id 4.4.4.4 ! 10.1.35.55 -> 1.1.1.1 : FastEthernet0/0 (next hop 10.1.23.2) The configuration of R4 is as follows: Network 10.1.45.4 0.0.0.0 area 1 0/0/0 Mpls traffic-eng tunnels mpls label range 200 299 R1.00-00 Bw[1]: MPLS supports multiple Layer 3 protocols 10.1.23.2 Test . 4 : SET 'bit-overload-the suppress External R1(config-router)#authentication key-chain test level-1 R1(config-router)# authentication mode md5 level-1 Area Address: 49.0001 The mere motivation to set up overload due to insufficient device resources is now running out. After all, the performance of the device is getting better and better. OSPF , this is not the same as other IGP protocols. Therefore, if you want to make the routing full, you need to add a re-release directly to R3 . R3.01-00 Then R1 will use the IGP of Metric , and ignore R2 on the configuration of the physical interface adminnitration-weight , so after the entry into force of the above command, go R1 view on the tunnel 's path weight , it turned into a 3 . Interfaces: ADSPEC PATH Maximum reservable bandwidth information: 104 RouterID , or the IP address of the interface . Network 5.5.5.5 0.0.0.0 area 0 ADSPEC Ip address 3.3.3.3 255.255.255.255 Types of. The 7th bit is an internal / external flag, set to 0 to indicate an internal metric, and 1 to be an external metric. Regarding the priority of the tunnel and the verification of the currently available bandwidth: First , the configuration of the tunnel is as follows: 75000 R1#show ip ospf database opaque-area self-originate 10.1.45.4 10.1.45.5 There are three types of PDUs : the IS-the IS of ES-IS and CLNP Mpls ldp sync The above is the debug information under normal circumstances . The TE LSP tunnel is initiated by the head end of the tunnel. LSPID A router can have up to 254 th Area ID . Of course, generally one router belongs to one area, and the situation of multiple areas may be used for merging,what is the latest ccna exam, splitting or changing of areas (see below). ! IS-IS support for IPv6 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 .