101 labs for the cisco ccna exam pdf download

101 labs for the cisco ccna exam pdf download

About 30.0 / 24 prefix, C allocates a label 23 , the mapping is transmitted to the B ; B local to 30.0 / 24 allocates a label 22 , the mapping is transmitted to the A . R1#show mpls ldp neighbor The virtual link implements a level 1 repair path through the backbone . The zone designated router sets the partition repair of its level1 LSP . Is-type level-2-only !! R4 is L2 router , so modify the is-type type to level2-only Global Pool Sub Pool Take a look at the routing table for R1 : Tunnel: Nterface IP interface address The IS-IS adjacency on the LAN is still different from the P2P link: Ciphertext interface authentication Type block This is 1B , which contains a number of important bits: / / Whether the local will retain all the label mapping messages received from the neighbor in the database Fast tag rewrite with Fa0/0, 10.1.12.2, tags commit: {203} via 10.1.12.2, FastEthernet0/0, 0 dependencies Ip unnumbered Loopback0 tunnel mode mpls traffic-eng tunnel destination 5.5.5.5 L1 Mpls ldp router-id Loopback0 Router(config)#Ip cef The configuration of R1 is as follows (the tunnel is not configured temporarily ): When IS-IS is running on an NBMA network, there are some problems. For example, to perform interface ciphertext verification between R1 and R2 : Interface loopback0 1.1.1.1:0 Outgoing PDU length : the length of the entire PDU , including the header Interface Tunnel0 Tunnel: 75000 !! 2.2.2.2 The metric of the link is unchanged This global command is used to modify it. After the expiration of the timer,101 labs for the cisco ccna exam pdf download, the IGP will establish an adjacency on the link. Once the IGP adjacency is established and the LDP session has not been synchronized, the IGP will advertise the metric of the link to the maximum. lab environment It should be noted here that if a label package is received and the label is 0 , the label will be directly popped up and the data will be submitted to the FIB for searching, and there will be no loss of the search. Label tag with tag 0 , why not just remove the tag (allocate a 13 value to the next hop to let the next hop remove the tag), why keep the tag header with 0 ? This is to maintain the uniformity of network planning under certain circumstances. For example , if QoS of MPLS is deployed , the EXP field in the label package is required, and then a label is required. When QoS is implemented , the last hop must carry the exp bit. Therefore, the label cannot be ejected. You need to configure mpls ldp explicit-null. The label assigned to a specific route is 0 and passed to the LDP neighbor (such as the penultimate hop). .