free cisco ccna practice exams

free cisco ccna practice exams

Links that do not meet the required bandwidth are not considered. Then after filtering, the following links are left: Nterface fast0/0 mpls mtu mtu-size IS-type Bw[7]: 1019 947 The PATHTear packet is similar to the PATH except that it is sent when the TE tunnel LSP created by the headend router needs to be removed . For example, the tunnel interface is manually shut down . FastEthernet0/0, Src IP addr: 10.1.12.2 Addresses bound to peer LDP Ident: *Aug 18 04:37:06.243: STYLE type 1 length 8 : (Tunnel0) Destination: 4.4.4.4 After the configuration is complete, we find that the adjacency relationship between R1 and R2 is UP , that is, the area authentication does not carry the authentication information in the IIH packet. Not only that,free cisco ccna practice exams, but the PSNP sent by R1 also has no authentication information, but the issued LSP has clear text authentication information. The experimental phenomenon is quite interesting. For R1 , all IS-IS messages received by R2 are not authenticated. R1 mainly focuses on LSP . It is found that the LSP sent by R2 has no TLV for authentication , so R1 ignores The LSP sent by R2 causes the routing table of R1 to be empty. However, although the LSPs sent by R1 are all with authentication information, R2 is not enabled.Area authentication, so R2 receives this packet, can also read, and can also use these LSPs , so R2 can learn the route of R1 .