best ccna simulator

best ccna simulator

( ZeroAgeLifetime , during which only the header of this LSP is reserved ), it will be deleted when this time is reached. Configure MPLS TE tunnel on R1 . *Aug 18 09:06:02.699: 10.1.24.2 (Strict IPv4 Prefix, 8 bytes, /32) .......................................... *Aug 18 11:31:44.598: Incoming PathError: 7 Nterface fast0/0 mpls mtu mtu-size Address-family ipv4 vrf VPN-A no synchronization Nexthop 10.1.12.2 FastEthernet0/0 label 204 Adjacent router Pop Label Configure the encapsulation mode of the tunnel as MPLS TE. In this way, B receives a label packet with a label value of 22 sent by A , and pops the label to obtain an IP packet, and then forwards it to C , and then C only needs to search and forward the FIB table of the IP packet . Mpls traffic-eng tunnels mpls ip Mpls traffic-eng tunnels mpls label range 400 499 The main function of the ES-IS protocol is to provide mapping of NSAP addresses to SNPA addresses for network devices . Router ospf 1 This inbound label packet, with a label value of 203 ,best ccna simulator, indicates in the LFIB table of R2 that 203 needs to be exchanged to 300 and then dropped to the next hop. R3.02-00 ! On C , first look up the LFIB table and find that the label is to be popped up, so it will pop up the label and pop up and find it is an IP packet, so go check FIB again. Interzones can only be interconnected via L2 or L1/L2 routers No mpls ip propagate-ttl [ forwarded | local ] Modify ldp holdtime , default 15S Debug information on R1 Interface Loopback0 Fa0/0 The IS-IS adjacency on the LAN is still different from the P2P link: 8 Setting the priority and maintaining the priority all indicate whether a TE tunnel can preempt another TE tunnel by using the corresponding value . The lower the priority, the higher the importance. R1#sh mpls ldp bindings We can still see the label bundles passed by R3 before in the LIB table of R1 : Nolabel/505 System ID , larger than 2 4 10.1.45.5 8 msec 8 msec * ! 0/0/0 OSPF is LSADB TE headend router tunneling according TE calculated database TE optimal path of the tunnel, and with reference to the bandwidth constraints. In addition, the optimal path can also be defined by an explicit path option that the user configures on the tunnel interface. In either case, the headend router knows the specific path used by the TE tunnel. Physical_bw: 100000 (kbps), max_reservable_bw_global: 75000 (kbps) Let's take a look, why is it exposed to network information? Suppose A below router E , E made to be a packet to D under F. , The data packet is A tag the transferred B , assumed that the BC loop appears between subsequent label TTL is decremented to 0 , since the TTL value The setting is very small, so very quickly, the TTL is decremented to 0. At this time, B (message discarder) will send an ICMP error message back to E. Then, if B has E route (or label), B will The ICMP error message will be sent directly back to E. If not, B will continue to tag the error message and gradually pass it to D , D.As the PE , about E route, then back to the label and then loaded on E . Then, no matter what the situation, the final E can receive the ICMP error message generated by B.