how to download ccna certificate online

how to download ccna certificate online

R3.02 103 Router ospf 1 *Aug 18 11:26:02.546: 0x4769 Interface Tunnel0 O 1.1.1.1 [110/65537] via 10.1.23.2, 00:09:07, FastEthernet0/0 Tunnel mpls traffic-eng path-option 10 dynamic IS-IS Level-2 Link State Database: The interface IP of R3 is 10.1.23.3 . No support for Ip multicast routing OutLabel : FastEthernet0/0, 201 IGP metric: 1 Clear text interface authentication The configuration of R2 is as follows (all configurations are omitted from the configuration of interface IP ): Mpls traffic-eng router-id loopback0 mpls traffic-eng area 0 BandwidthOverride: disabled LockDown: disabled Verbatim: disabled Configure the destination of the tunnel *Aug 18 04:37:06.243: service id = 5, service length = 6 If an LSP is continuously destroyed during transmission, it will be continuously cleared by other routers, and the source router will continue to resend. This creates an LSP destruction storm. CISCO IOS allows routers to ignore corrupted LSPs and write errors only to log files locally. Open with the lsp-ignore-errors command. Min unit=0 bytes, max pkt size=2147483647 bytes The above is the debug information under normal circumstances . In fact, this is a metric trick, but when we are thinking about it, remember to take the virtual path of the tunnel into consideration. System ID 6 -byte system ID , ES or IS identifier, similar to OSPF 's Router ID , each device has a system ID , and the IP network, each interface has an IP , which is the difference between one of . Note: The SystemID must be unique across the entire Area and trunk ( Level2 ). RFC 3787 We see that the forwarding aspect of the data is this: 10.1.34.4 router C A pseudonode represents a broadcast multi-access network (including all ISs connected to this LAN ), which actually "as a router" (above, gray router) in the network. In other places, this is a whole. So does this whole have to generate an LSP ? This LSP is generated by the DIS . Address-family vpnv4 neighbor 2.2.2.2 activate Keeping priority indicates how much weight a tunnel has, so that it can be preserved in the link; Fa1/0 Tunnel mpls traffic-eng path-option protect 10 explicit name R2R3R4 A new LSP is triggered immediately and the ATT is not set. As a result, R1 revokes the default route that originally pointed to R2 . Experimental configuration L1 Label 1 router warning label Bandwidth information Control plane : exchanges Layer 3 routing information (such as OSPF , ISIS , BGP, etc.) and labels (such as TDP , LDP , BGP, and RSVP ). NLPID that identifies the network layer protocol packet is a 8 -bit field, the IPv6 is NLPID value 142 ( 0x8E ). If the IS-IS router supports *Mar 1 00:09:39.243: ISIS-Adj: Authentication failed Is-type level-1 metric-style wide 3.3.3.3 Finally, the path of the second TE tunnel is as follows: IGP Neighbor: ID 10.1.23.2 Router-id 3.3.3.3 Bytes tag Outgoing Next Hop If an LSP is continuously destroyed during transmission, it will be continuously cleared by other routers, and the source router will continue to resend. This creates an LSP destruction storm. CISCO IOS allows routers to ignore corrupted LSPs and write errors only to log files locally. Open with the lsp-ignore-errors command. 4.4.4.0/24 Network 1.1.1.1 0.0.0.0 area 0 The router in Lan establishes an adjacency with all other routers in the same LAN with the same area ID and hierarchy . *Aug 18 11:31:44.598: IS Hops:1 S1 / 0 port hung up, then R2 will no Level2 abutting relationship, that is,how to download ccna certificate online, R2 and backbone or level2 area disconnected, For prefix-access-list – the IP access list that selects the destinations for which the labels will be PHP penultimate jump pop-up mechanism Partition repair: on . 8 bits if the LSP originating router supports the repair area division is set this field Attached bits : the first 4-7 bits, for setting the LSP association with another area available with the following metrics: of . 4 -bit - default; 5th bit - delay; 6th bit - overhead; 7th bit - error Network 3.3.3.3 0.0.0.0 area 0 Activate the MPLS TE extension for each router's OSPF and manually set the RouterID for MPLS TE . Tag or VC 4 10.1.45.5 0 msec * 0 msec 33M Then we wait for the BGP neighbor relationship on R2 to be established. You can debug it: The penultimate hop pop-up mechanism has two types of labels, one is POP or implicit null , the label value is 3 in LDP , the other is explicit null , and the label value is 0 in LDP . If the tag value sent by the neighbor about a route is 3 , then when I send the data to the neighbor, I will pop the tag and transfer the inner data to the neighbor. If the neighbor has a tag value of 0 for a route , the local device will send a label ( zero ) to the neighbor and send it to the neighbor.