ccna current version

ccna current version

301 The label stack is placed before the third layer header, that is, before the header of the transmitted protocol, and after the header of the second layer. We see that R1 has learned to 2.2.2.0 , 3.3.3.3.0 and 10.1.24.0 , 10.1.34.0 . Mpls traffic-eng tunnels mpls label range 100 199 Interface Tunnel0 Local Network 10.1.12.1 0.0.0.0 area 0 Next Hop LSPID At this time, R2 goes to 55.55.55.55 , and the traditional IP data is taken instead of the LSP . PSNP In the LAN , SNPA refers to the MAC address. Phenomenon observation 0 kbits/sec 101 Name: R1_t0 Status: Type Block Mpls traffic-eng tunnels ip rsvp bandwidth *Aug 18 09:06:07.919: Controlled Load Service break bit=0 service length=0 Ip unnumbered Loopback0 tunnel mode mpls traffic-eng tunnel destination 5.5.5.5 Finally, let's complete the configuration of R1 : Used to establish and maintain adjacent relationships Next-address 10.1.45.5 Interface eth 0/1 *Aug 18 09:06:07.919: average rate=250000 bytes/sec,ccna current version, burst depth=1000 bytes Src 1.1.1.1, Dst 4.4.4.4, Tun_Id 0, Tun_Instance 2 RSVP Path Info: Interface eth 0/0 FastEthernet0/0 via high priority queue 75000 List the adjacent L1-routers . Note that our section says L1 router. All routers run OSPF Contains information such as the tunnel sender address, LSP ID, etc. 201 IGP System ID: 2.2.2.2 OutLabel : Ethernet0/1, 305 Mpls traffic-eng router-id loopback 0 mpls traffic-eng level-1 Priority : Priority. The DIS priority of the interface used to elect the DIS in the broadcast LAN . The higher the priority value, the more likely the router becomes a DIS . supporting agreement End System terminal system The label mapping message advertised locally is meaningful to the local . The label corresponding to the same FEC advertised from different interfaces is different. In the IGP (such as OSPF or ISIS configuration) of the routing process. This command sets the TE router 's routerID Basic experiment Tib entry: 10.1.23.0/24, rev 8 Net 49.0001.0000.0000.0002.00 Let the ES know where it is, the area prefix The paragraph appears in the first paragraph. Type Bandwidth: 0 kbps (Global) Priority: 7 7 Affinity: 0x0/0xFFFF Metric Type: TE (default) 366 Next-address 10.1.34.4 Interface Address : 10.1.12.1 Admin Metric : 1 With BDR , the DR cannot be preempted, and the DR sends Hello at the normal frequency. AutoRoute: disabled LockDown: disabled Loadshare: 0 bw-based auto-bw: disabled 10.1.12.2 R1(config-keychain-key)#key-string cisco R1(config-keychain-key)#exit Local binding: tag: 102 R1#show mpls ldp discovery detail In an actual environment, MPLS TE is often deployed only in a few core nodes . The edge node cannot sense the existence of the TE tunnel and can only select routes according to the traditional IGP . Net 49.0001.0000.0000.0002.00 Mpls traffic-eng router-id loopback0 mpls traffic-eng area 0 Tag or VC (Link ID) Designated Router address: 10.1.12.1 (Link Data) Router Interface address: 10.1.12.2 Number of MTID metrics: 0 In the dynamic setup, let the tunnel head end router calculate the path that the TE tunnel can traverse the network to the tail end in an optimal manner. We only need to configure the destination of the tunnel , and then the first-end router uses the CSPF algorithm to calculate the path itself. Tag information from 10.1.15.0/24, shared local tag: 403 ! Reservable Bandwidth[3]: In the explicit setup mode, we must specify the router that the TE tunnel needs to traverse. You can specify the TE of the router in the link. Mpls traffic-eng tunnels mpls label range 200 299 Type-10 Opaque Link Area Link States (Area 0) ! Ip address 10.1.45.4 255.255.255.0 / / View the basic parameters of the protocol Tunnel mpls traffic-eng autoroute metric absolute 32 Ip rsvp bandwidth 2000 500 behind 500 is for a single stream, limited to 500K 75000 In R2 configuration backup link, R2 increase in the following configuration: Link state information IGP itself supports R2#sh isis neighbors ! Outgoing *Aug 18 09:06:07.919: SENDER_TEMPLATE type 7 length 12: 5.5.5.5/32 Type 2 length 36: ! SystemID Length : Identifies the length of the system ID . A value of 0 indicates a length of 6B , a value of 255 indicates a length of 0 , and other system ID fields may have a length of 1-8 bytes. The average allocated traffic on the interface. Restrictions: 201 R3.00-00 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.