cisco ccna practice

cisco ccna practice

The establishment of an OSPF adjacency involves a more complex process. Next-address 10.1.34.4 13223 The interface will be created. We just need to put the traffic into the tunnel port, there are still a lot of methods, we will continue to introduce in the following content. The global configuration command metric-style transition allows the original narrow metric to be smoothly extended to a new width. This command allows a router to accept and transmit both narrow and wide quantities. Interface Tunnel0 This time we did the test, environmental test just a different, TE the Tunnel tail end now is to R4 of 4.4.4.4 . Router-id 2.2.2.2 The TTL is placed in the label header. Turning off TTL propagation prevents the MPLS network from being exposed (by traceroute ). ! R3 Look again, now looking at the traffic with the source of 10.1.35.55 for 1.1.1.1 , we found that R3 uses another equivalent path, that is, it goes out from the F0/0 port. This is based on the meaning of the source address pair. MTU implicit check SENDER_TEMPLATE TE metric: 1 Bw[5]: R3#show ip route Path option 10, type dynamic (Basis for Setup, path weight 3) Router ospf 1 RFC 2205 Resource Reservation Protocol (RSVP) Point3 =250000 bytes/sec *Aug 18 09:06:02.699: ADSPEC type 2 length 48: If a tunnel1 establish priority than the tunnel2 high hold priority, then tunnel1 be able to seize tunnel2 200 Src 1.1.1.1,cisco ccna practice, Dst 4.4.4.4, Tun_Id 0, Tun_Instance 2 RSVP Path Info: Router(config)#interface fast0/0 TE tunnels are an aggregation of traffic flows of the same class (bandwidth , etc.) which are placed inside a common MPLS LSP Interface eth0/1 Each IP packet forwarded to a router is the same before and after being forwarded through the router. Connection method) R1 2.0.0.0/24 is subnetted, 1 subnets Periodic flooding Oper: up Next we R3 and R5 activate the forwarding adjacency, then R3 and R5 will be advertised in this region of the Tunnel- ( L in the manner of direct links). Bw[0]: L1 Sub Pool Reservable Bandwidth[4]: ISO10589 2.2.2.2 *Mar 1 00:00:32.759: ISIS-Upd: full SPF required State: Oper; Msgs sent/rcvd: 13/13; Downstream Up time: 00:04:05 Bw[1]: Ip router isis Let us verify it now. Initialization message The LSP is transmitted to R2 all the way , and in R2, the pop-up label becomes an IP packet and then forwarded to R1 . R1 then forwards the IP packet to R5 and fixes it. Network 10.1.12.1 0.0.0.0 area 0 R1#show ip ospf database opaque-area self-originate The L1 router only has the link state database of Level1 in the area , and contains routing information of all L1 routers in the area. Router(config)# mpls ldp advertise-labels [for prefix-access-list [to peer-access-list ] ] Test the transmission process of the data stream, observe the phenomenon *Aug 18 09:06:07.919: IS Hops:1 *Aug 18 04:37:06.239: parameter id=127, flags=0, parameter length=5 75000 10.1.12.2 Aggregation: The label stack is removed and an IP lookup is performed on the IP packet. For all practical applications, IS-IS only supports broadcast and point-to-point links. The NBMA link is not supported . In the NBMA environment, it can be equipped Both interfaces: 1 interface: The TTL is placed in the label header. Turning off TTL propagation prevents the MPLS network from being exposed (by traceroute ). 201 R2.00-00 Router ospf 1 Prefix However, not all messages with the same label belong to one FEC , because the EXP values ​​of these messages may be different and may be performed differently, so they may belong to different FECs . Small to check if the MTU of both parties matches The router uses a local circuit ID of 8 bits to assign a local unique link identifier to each point-to-point link. Interface eth0/0 Age L1/L2 router is usually located on the area boundary (Tunnel0) Destination: 5.5.5.5 Interface tunnel0 3.3.3.0 [115/20] via 10.1.23.3, Serial1/0 ISO10589 Ip address 10.1.123.1 255.255.255.0 Pop tag 1.1.1.1:0 Three-way handshake mechanism: Basic Experiment ( LinkProtection ) So using this feature (an IS-IS process to configure multiple NET addresses), you can achieve: DR 10.1.34.4 4.4.4.4 State: Oper; Msgs sent/rcvd: 26/22; Downstream Up time: 00:09:33 Interface eth 0/2 Mpls ip After the tunnel setup failed Note: To use the above command to complete conditional notifications, you need to use no mpls ldp advertise-labels first . Otherwise, the LSR advertises all label bindings. !! Outbound label 201 , which is given by R2 Bandwidth: 20000 kbps (Global) Priority: 7 7 Affinity: 0x0/0xFFFF Reservable Bandwidth[0]: We see the above output, R1 , R2 , R3 all generate LSP , and the asterisk entry is issued by R1 itself. In addition, there is a special 10.1.34.4 Mpls traffic-eng tunnels ip rsvp bandwidth Router isis Or Tunnel Id *Mar 1 00:09:39.243: ISIS-Adj: Rec L1 IIH from cc01.0a44.0000 (FastEthernet0/0), cir type L1, cir id 0000.0000.0002.02, length 1497 Next Hop Fa0/0 Ip route 5.5.5.5 255.255.255.255 Tunnel0 0x2D6E L2 router , connected to different Leve1 area . Stores a separate Level2 LSDB . Ip cef Router-id 6.6.6.6 The way to use static routing is of course the easiest, and the best control, but the scalability is too poor, if there are multiple tunnels, then configuration and maintenance is more troublesome. LSP TLV field of Level 2 route 1.1.1.1 [110/3] via 10.1.34.4, 00:53:36, FastEthernet1/0 ---------- MPLS TE router ID: 1.1.1.1 i* L1 C 10.1.24.0 is directly connected, Serial0/0 C 10.1.45.0 is directly connected, Serial0/2 C 10.1.34.0 is directly connected, Serial0/1 i L2 10.1.123.0 [115/20] via 10.1.34.3, Serial0/ 1 SSN ( send Sequence Number ): send serial number flag 0x00000037 ! Ip cef 1 Interface Loopback0 No output feature configured Interface tunnel0 IS-Extended R2.01 R2.00-00 0x2D6E Ip router isis 2.0.0.0/32 is subnetted, 1 subnets Interface eth 0/0 10.1.23.2 RESV 2.2.2.2/32 New object for RSVP-TE extension *Aug 18 09:06:07.919: SENDER_TEMPLATE type 7 length 12: LSP midpoint frr information: LSP identifier Route-target import 2345:5 Network 10.1.23.3 0.0.0.0 area 0 basic concept R2#sh isis neighbors Policy routing The load of the routing processor is low in large areas Tag request object After completing this configuration, take a look at the phenomenon: AutoRoute defect *Aug 18 09:06:07.919: peak rate =250000 bytes/sec Run the interface configuration command: isis metric value level-1 | level-2 to configure the metric on the same interface. Bw[7]: One is the LAN on to Ll Router ( Level-1 to the IS the Hello PDUs the IS LAN ), a method in LAN on to L2 of Router (a to the IS LAN the Hello PDUs the IS Level-2 ) Outgoing Label Mpls ldp router-id loopback0 mpls label protocol ldp IS-IS Adjacency related packets debugging is on R1# The affinity attribute is a property that describes the MPLS TE tunnel and is also composed of 32 bits , which is exactly the same as the number of attribute-flags mentioned above . Also configured with the affinity attribute is a mask, also 32bits , which is used to match the attribute tag and the affinity attribute.