ccna routing and switching test

ccna routing and switching test

Router(config)#tunnel mpls traffic-eng path-selection metric ? igp use IGP metric Each IP packet forwarded to a router is the same before and after being forwarded through the router. ISO addressing Three triggers that may cause the TE tunnel to reoptimize . Type 9 flooding range only on this link Ip cef 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 The static route forwarding mode of the MPLS TE tunnel supports route recursion. Labels 0-15 are all reserved labels. Here are some reserved tags that have a specific role: --------------- 0 Or, I let the LDP adjacency between R1-R4 be established, then the OSPF between R1-R4 will naturally come up. Well, we now let the LDP adjacency between R1-R4 , and then the OSPF adjacency will be automatically established. Route-map test permit 10 router isis 75M Explicit_route Bw[1]: Point3 Fa0/0 O Ip address 10.1.23.2 255.255.255.0 Configure on R2 as follows: 0x1B7C *Aug 18 09:06:07.919: *Aug 18 04:37:06.239: version=0, length in words=7 14 Assuming the bandwidth of the local physical outgoing interface is 100M , the default reservable bandwidth of rsvp is 75% . Here is 75M. Et0/1 2.2.2.2 IS-IS Adjacency related packets debugging is on R1# IS-IS link state database 75000 Router(config-if)#ip rsvp bandwidth [total-flow-kbps] [single-flow-kbps] Mpls traffic-eng tunnels mpls label range 400 499 10.1.34.4 4.4.4.4 Nterface fast0/0 mpls mtu mtu-size 10.1.45.4 10.1.45.5 *Aug 18 09:06:02.699: Tun Sender: 1.1.1.1 LSP ID: 247 Router ospf 1 ! Create a TE tunnel on R1 , the path is R1-R2-R4-R5 , and create another backup tunnel path as R1-R2-R3-R4-R5 . This path is used as the backup tunnel of the former . 10.1.34.4 Mpls traffic-eng tunnels ip rsvp bandwidth Route-map test permit 10 router isis IS-IS packets carry all easily expandable information using TLV fields Router-id 4.4.4.4 *Aug 18 04:37:06.239: Path MTU: 1500 Router(config)#Ip cef Of course, when deploying, we strongly recommend that the same tunnel should have the same priority and priority. *Aug 18 09:06:02.699: Path Latency (microseconds):0 Local binding: tag: 101 Periodic update. OSPF of LSA aging time for the 3600s , refresh interval CEF 's hash algorithm to select the battle interface. Note that if there is an IP (unlabeled) path and a labeled path has the same metric, only the labeled path is used for packet forwarding. This is because in some cases, traffic that passes through an unlabeled path cannot reach its destination. For example , on a P router in an MPLS VPN environment . InLabel : - Uptime: 12 seconds 10.1.34.4 [MPLS: Labels 404/505 Exp 0] 0 ​​msec 0 msec 0 msec 10.1.12.2 LSP serial number 10.1.23.3 [MPLS: Labels 300/403 Exp 0] 0 msec 4 msec 0 msec It should be noted here that if a label package is received and the label is 0 , the label will be directly popped up and the data will be submitted to the FIB for searching, and there will be no loss of the search. Label tag with tag 0 , why not just remove the tag (allocate a 13 value to the next hop to let the next hop remove the tag), why keep the tag header with 0 ? This is to maintain the uniformity of network planning under certain circumstances. For example , if QoS of MPLS is deployed , the EXP field in the label package is required,ccna routing and switching test, and then a label is required. When QoS is implemented , the last hop must carry the exp bit. Therefore, the label cannot be ejected. You need to configure mpls ldp explicit-null. The label assigned to a specific route is 0 and passed to the LDP neighbor (such as the penultimate hop). .