ccna pdf download free

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Name: R1_t0 Status: To update the LSDB , the LSP will be cleared from the LSDB . After the old LSP is cleared from the LSDB , it will remain for a while. Only the label mapping message of the route prefix advertised by the next hop neighbor of the optimal route is saved locally. Let's look at the picture. If R1 to R6 want to establish a TE tunnel ,ccna pdf download free, which is the optimal path, and the bandwidth requirement is 30Mbps , what is the calculation process? First of all, thanks to the flooding of link state information in the zone, " OSPF or IS-IS for MPLS TE extensions ", *Aug 18 09:06:07.919: 10.1.45.5 (Strict IPv4 Prefix, 8 bytes, /32) Global Pool Frame-relay map ip 10.1.123.1 301 broadcast i*L1 0.0.0.0/0 [115/10] via 10.1.123.3, FastEthernet0/0 Ip cef Let us verify it now. Ip cef The IS-IS packets have the same common 8B above , and the additional header fields are different, and then the TLV field. At the time of packet capture , the ternary in the TLV : type, length, variable length content, type and length in the packet, the packet capture software may not be presented, but the type and length can be found from the binary code of the packet capture result. content. C 10.1.123.0 is directly connected, FastEthernet0/0 i*L1 0.0.0.0/0 [115/10] via 10.1.123.3, FastEthernet0/0 Outgoing Label Fspec: ave rate=20000 kbits, burst=1000 bytes, peak rate=20000 kbits History: Options: (No TOS-capability, DC) LS Type: Router Links 10.1.23.3 [MPLS: Labels 300/403 Exp 0] 0 msec 4 msec 0 msec MPLS relies on IP routing and CEF switching The configuration of R2 is as follows (the tunnel is not configured temporarily ): Turn off TTL propagation R1# SRM ( Send Routing Message ): Send routing information message Time since created: 5 hours, 38 minutes The current maximum available bandwidth is listed under the interface according to their respective priorities. This command will cause the tail router to advertise implicit empty labels. (default action notification explicit empty label) 10.1.34.4 [MPLS: Labels 404/505 Exp 0] 0 ​​msec 0 msec 0 msec 1/0/0 [5]: 75000 kbits/sec IS 6B is systemID + 1B of PSN ID L2 router , connected to different Leve1 area . Stores a separate Level2 LSDB . Mpls traffic-eng router-id loopback0 mpls traffic-eng area 0 Moreover, since the default duration is indefinite, these entries will remain. Of course, if you modify the configuration on R1 : ! *Aug 18 09:06:02.699: ADSPEC type 2 length 48: OSPF is routerID Mpls traffic-eng tunnels mpls label range 100 199 Ip address 2.2.2.2 255.255.255.255 Type 11 flooding range is the entire domain (will not enter the stub area) Next-address 10.1.45.5 Ip cef O *Aug 18 11:31:44.598: Assuming the bandwidth of the local physical outgoing interface is 100M , the default reservable bandwidth of rsvp is 75% . Here is 75M. R1(config)#router isis L1/L2 router re-releases external routes into IS-IS ( to level-1-2 ) Label or VC Fspec: ave rate=20000 kbits, burst=1000 bytes, peak rate=20000 kbits History: Type-10 Opaque Link Area Link States (Area 0) ISO IS-IS Routing Protocol Fa0/0 Or Tunnel Id Area verification is actually the verification of Level1 area . After the area authentication is added to an IS-IS router, it will check the IS-IS packets it receives . If there is no authentication information or error in the packet, it will be ignored. The IS-IS packet generated by the device itself carries the authentication information. If the receiver does not have the configuration area authentication, the device can still learn normally after receiving the packet carrying the authentication information. The authentication information of the area authentication is only included in the LSPs packet. Other packets are not included.