examcollection ccnp

examcollection ccnp

IS ( layer 0 routing ), then the router will look up the destination address and forward the packet along the best path. Extended intermediate system reachability TLV (type 22 ) Explicit Route: 10.1.23.3 10.1.34.3 10.1.34.4 4.4.4.4 1/0/0 BW (kbps) Admin: up 6bits R1#show isis database Filter the inbound label bundles advertised by LDP neighbors. =250000 bytes/sec Outgoing ISO IS-IS Routing Protocol Network 55.55.55.55 area 0 Redistribute isis ip level-2 into level-1 route-map test Router ospf 1 2.2.2.2 MPLS TE takes into account the actual use of network resources, so it requires more information than just interface bandwidth or cost . *Aug 18 09:06:07.919: SESSION type 7 length 16: Although the implicit null tag also uses a tag with a tag value of 3 , tag 3 will never appear in the tag stack of the MPLS message, which is why it is called an implicit null tag. 17 It can be seen that ES-IS plays a role in the CLNS network environment as if the ICMP , ARP and DHCP protocols in the IP network work together. Solution: Establish a targeted LDP neighbor relationship between R2 and R4 Average rate=250000 bytes/sec, burst depth=1000 bytes Mpls ip Mpls label rangempls label range 100 199 interface fa0/0 i L2 Interface Loopback0 1/0/0 ! Tag The LSR does not need to re-establish an LDP session, and the efficiency of convergence is improved. The trick of traditional IP routing: If CSNP is received and it is found that LSPs are lost , the router will retransmit the lost LSP . Retention mode (the Label Retention) : free mode (Liberal Retention) Ip address 10.1.23.3 255.255.255.0 Now the initial environment, R1 can learn inter-area routes,examcollection ccnp, and R2 locally re - routes to level 1 route 2.2.2.0 . Of course, since R2 sets the attached-bit , R1 also generates a default route to R2 . Meet the FIB , LIB , and LFIB tables O 1.1.1.1 [110/65537] via 10.1.23.2, 00:09:07, FastEthernet0/0 The above is the debug information under normal circumstances . Certification Information R2.00-00 Circuit type : 01 means L1 router, 10 means L2 router, 11 means L1/2 router R1.00-00 The current maximum available bandwidth is listed under the interface according to their respective priorities. State: Oper; Msgs sent/rcvd: 13/13; Downstream Up time: 00:03:47 Mpls traffic-eng tunnels mpls label range 400 499 Flooding Protocol: OSPF Header Information:: 404 *Aug 18 04:37:06.239: Flags: 0x0 1.1.1.0 is directly connected, Loopback0 2.0.0.0/24 is subnetted, 1 subnets LSP Database LSP database Metric Type: TE (default) InLabel : - Mpls traffic-eng tunnels mpls label range 500 599 Time since created: 5 hours, 38 minutes R1#show mpls forwarding-table Area 2 -byte area identifier, also referred to as Domain from the upper portion (the portion defined HODSP is ) used to Domain R1(config)#key chain test 4.4.4.0/24 Record Route: 2.2.2.2(200) 4.4.4.4(403) Set-overload-bit on-startup wait-for-bgp !! Use the dynamic calculation method to establish the tunnel PATH If the payload of the MPLS is an IPv6 packet, the load balancing is performed according to the source and destination addresses in the IPv6 header. Log-adjacency-changes Interface Tunnel0 Tunnel mpls traffic-eng priority 7 7 tunnel mpls traffic-eng bandwidth 20000 In-label Out intf/label Configuration command 0x00000011 0x26DC Tag The IS-IS area defined in ISO 10589 is the stub area. Attached defines four metric types. CISCO IOS only supports the default metric . The unit is Bytes , multiplied by 8 is 100Mbps Fa0/0 Since R2 and R3 do not run the BGP protocol, and there is no route for 5.5.5.0 and 6.6.6.0 in Core OSPF , the final result is A label switched path (LSP) Of course, we can also modify the TE metric , for example on the F1/0 port of R2 : LDP discovery sources: Neighbor relationship establishment Mpls traffic-eng tunnels mpls label range 400 499 TE router ID of the device LSP Seq Num LSP Checksum LSP Holdtime Mpls traffic-eng router-id loopback0 mpls traffic-eng area 0 Network 10.1.45.5 0.0.0.0 area 0 10.1.34.3 Selection: reoptimation Prior LSP: Bw[0]: The composition of the router , Backbone must be continuous. supporting agreement Ip router isis router isis Mpls traffic-eng tunnels mpls ip If it is a frame relay primary interface or a P2MP sub-interface, it is required to be a fully interconnected PVC . For details, see the relevant sections of this document. 2 10.1.23.3 [MPLS: Labels 305/403/505 Exp 0] 8 msec 4 msec 4 msec Topology environment description: 75000 After all the LDP routers have sent the label bundles to each other, everyone gradually builds their own LFIB . Nolabel/506 Router ospf 1 Interface Tunnel0 Tag rewrite with Fa0/0, 10.1.12.2, tags imposed: {203} LFIB label forwarding information base Generated i ia 10.1.24.0 [115/148] via 10.1.123.2, FastEthernet0/0 i ia 10.1.45.0 [115/158] via 10.1.123.2, FastEthernet0/0 i ia 10.1.34.0 [115/158] via 10.1.123.2 , FastEthernet0/0 C 10.1.123.0 is directly connected, FastEthernet0/0 Ip address 10.1.45.4 255.255.255.0 Default metric is supported by all IS-IS routers and is often interpreted as a measure that is inversely proportional to bandwidth. 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 , it will only be set in the L1 LSP , and only the L1/2 router will set this field.