boson ccna

boson ccna

Ip cef Configured in OSPF process mode, this command activates MPLS TE in a specific area. Outgoing The interface of each router activates RSVP and MPLS TE tunnel support. R1#show ip cef 4.4.4.0 detail 4.4.4.0/24, epoch 0 Ip cef IGP Area[1] ID:: ospf area 0 System Information:: Remote binding: tsr: 2.2.2.2:0, tag: 203 IS-IS requires the same length of the SystemID in the entire domain . If you receive the IIH , the " System ID Length " field is local to R3#show mpls forwarding-table 10.1.34.0/24 Configuration example The Internet segment of the device is shown in the figure, for example, 10.1.23.0/24 , which is the R2-R3 interconnection address segment, then the interface IP of R2 is 10.1.23.2 . An LDP session is a TCP session, and a TCP session may be attacked by TCP fragment spoofing. LDP authentication can be used for protection. MD5 will add a signature — called the MD5 digest, to the TCP segment. L1 router [Note] Label behavior of Frame Mode IGP Neighbor: ID 10.1.23.2 *Aug 18 09:06:02.699: Refresh Period (msec): 30000 0x0000000E By default TE metric equal to the IGP Metric (This means that, without using the above command interface disposed in the physical, TE metric equal to the IGP Metric ) Ip explicit-path name R2R3R4 enable next-address 10.1.12.2 10.1.23.3 [MPLS: Labels 300/403 Exp 0] 0 msec 4 msec 0 msec Router ospf 1 Show mpls ldp bindings HELLO message Oper: up If CSNP is received and it is found that LSPs are lost , the router will retransmit the lost LSP . Bw[0]: ! C Note: LDP or TDP only generates labels for routing entries of the IGP protocol, and does not generate labels for BGP routing entries. CSNP (Complete Serial Number PDU ) Prefix 55000 See below for more details on how labels are handled. Two processes: neighbor discovery process, session establishment process By default, an OSPF area is not a stub and can be configured as a stub. R3#show ip cef exact-route 10.1.35.55 1.1.1.1 After completing the above configuration, R2 and R5 will advertise this tunnel in their own Class 1 LSA , just like a direct link. Res. Global BW: 75000 kbits/sec !! interface's maximum reservable bandwidth IS-IS link state database Tunnel mpls traffic-eng autoroute announce The main function of the ES-IS protocol is to provide mapping of NSAP addresses to SNPA addresses for network devices . Various bandwidth information Reservable Bandwidth[4]: 129 The configuration of R1 is as follows: The interface of each router activates RSVP and MPLS TE tunnel support. The routing table for R1 is as follows: Interface eth0/1 ! System ID 6 -byte system ID , ES or IS identifier, similar to OSPF 's Router ID , each device has a system ID , and the IP network, each interface has an IP , which is the difference between one of . Note: The SystemID must be unique across the entire Area and trunk ( Level2 ). FR The DLCI Nodes level and area level Router# mpls traffic-eng reoptimize Keeping priority indicates how much weight a tunnel has, so that it can be preserved in the link; Local label info: global/16 Show ip route isis MPLS is a CISCO proprietary protocol, later IETF borrowed, in IETF is called Tag Switching , can be understood as both a different name when enabled, the protocol used is not the same Tunnel mpls traffic-eng autoroute announce tunnel mpls traffic-eng priority 7 7 10.1.23.0/24 Show isis database on R1 The configuration of R6 is as follows: Physical Bandwidth: Physical bandwidth of the 100000 kbits/sec !! interface Domain-wide Prefix Distribution with Two-Level IS-IS A list of directly connected IP address prefixes is listed, which is only used in non-pseudo-node LSPs . In CISCO IOS , a re-optimization of a TE tunnel is done every 1 hour by default . 00 MPLS VPN Backbone carried out within for MPLS TE in the OSPF extensions and R1 build on a TE the Tunnel , for their own sources of the Loopback0 , for the purpose of R5 is 5.5.5.5 OSPF uses different types of LSAs to carry different routing information. See below for more details on how labels are handled. IS-IS 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,boson ccna, 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.