cisco ccna routing and switching practice test

cisco ccna routing and switching practice test

Hello data unit: sent periodically to determine whether other ISs are running IS-IS , establish adjacencies, exchange LSPs , and synchronize LSDBs . Uptime: 12 seconds Indicates whether the LSP is from L1 router or L2 router . This field is 2bits . 00- not used; 01-level1 ; 10- unused; 11-level2 Tib entry: 4.4.4.4/32, rev 14 *Aug 18 11:26:02.546: To perform the same network segment check (the adjacency must be on the same network segment) The LSP mainly contains the following information. Run IS-IS on the entire network to announce direct connection and loopback interface. Verify and view Ip cef Prefix Interface eth0/0 Although the L1 / L2 router having both L1 and L2 function, but sometimes simply Establishing a specific interface on a layer adjacent relationship, are arranged on the other interfaces in the first 2 layers adjacent relationship. / / Whether the local will retain all the label mapping messages received from the neighbor in the database The LSR does not need to re-establish an LDP session, and the efficiency of convergence is improved. MPLS TE Router ID: 2.2.2.2 *Aug 18 11:26:02.546: ! IS-IS link state database Neighbor relationship establishment Modify the ldp hello message sending interval, the default 5S All interfaces of ospf area0 will automatically activate LDP. Configure this feature on the A device (usually on the edge device) no mpls ip propagate-ttl *Aug 18 04:37:06.243: Tun Sender: 1.1.1.1, LSP ID: 20 ! MTU , then it is possible to first slice and then pass, and then use this slice number to indicate ( 0 is the first segment,cisco ccna routing and switching practice test, 1 bit second segment, and so on), the maximum length of a single LSP is 1492 bytes, the most Can be divided into 255 pieces. IS-IS performs fragmentation when generating LSPs instead of generating large LSPs first , and then fragmenting them at the network layer (for example, IP ), thereby achieving the negative effect of reducing CPU resource waste.