certification cisco ccna

certification cisco ccna

Distribution mode (the Label Distribution's) : the downstream drive mode (Downstream Unsolicited) Router(cfg-ip-expl-path)#next-address 10.1.12.2 !! Note the input order Total Allocated The two new TLVs are: 4B is an unsigned integer. Starting from 0 , increase by 1 each time . When a router is first connected to the network, the sequence number of the first LSP it generates is 1 . The LSP sequence number generated when the network changes is also incremented by 1 . The LSP sequence number plays a key role in the data synchronization process, mainly in distinguishing between old and new LSPs . *Aug 18 11:31:44.598: No longer take the tunnel , and then go to traceroute 55.55.55.55 from R2 , no longer see the label. Interface eth0/0 Link[0 ]:Nbr IGP Id: 10.1.12.2, nbr_node_id:8, gen:47 frag_id 0, Intf Address:10.1.12.1 R1#show isis da R1.00-00 detail ! Bw-based Bw[7]: Network 10.1.45.4 0.0.0.0 area 0 mpls traffic-eng router-id loopback0 mpls traffic-eng area 0 TE overview Interface fast0/0 Mpls ip interface fa1/0 IGP Area[1] ID:: ospf area 0 System Information:: The following will be analyzed separately: In R1, this L1 router attempts to perform route summarization. The result is a failure. This is similar to OSPF . Routers in the area cannot be routed. Because we want to flood the LSP , the routers in the area must know the area. For details of the topology, if the L1 router is allowed to perform route summarization, does it lose the nature of the link state routing protocol? Outgoing interface 10.1.23.3 R1#show mpls ldp neighbor All routers in the area (except the border router) can only establish neighbor relationships with routers in the area. The LFIB table does not contain inbound interface information. Network 10.1.12.1 0.0.0.0 area 0 Activate the MPLS TE extension for each router's OSPF and manually set the RouterID for MPLS TE . Local Outgoing Prefix Bytes Label Outgoing Next Hop Label Label or Tunnel Id Switched interface LDP autoconfig 1.0.0.0 R2-PE1#show ip route The way to use static routing is of course the easiest, and the best control, but the scalability is too poor, if there are multiple tunnels, then configuration and maintenance is more troublesome. Ip address 1.1.1.1 255.255.255.255 Let's experiment one by one: ! Prefix adjacent router Reservable Bandwidth[3]: The LSP mainly contains the following information. Ip unnumbered Loopback0 tunnel mode mpls traffic-eng tunnel destination 4.4.4.4 IIH 1174 959 Active Type : 0x8848 (Multicast) The upper layer carries MPLS , looking for LFIB ! Forwarding Adjacency forwarding adjacency Regional association. The L1/L2 router sets this field in the L1 LSP it generates to notify the L1 routers in the same area to connect themselves to other areas. Usually, the L2 backbone area is connected. When the router in the L1 area receives the L1 LSP from which the ATT bit sent by the L1/2 router is set , it creates a default route to the L1/2 router so that data can be routed to other areas. Although the ATT bit is defined in both the L1 LSP and the L2 LSP ,certification cisco ccna, it will only be set in the L1 LSP , and only the L1/2 router will set this field.