ccna exam faq

ccna exam faq

basic configuration Fast tag rewrite with Fa0/0, 10.1.12.2, tags commit: {203} via 10.1.12.2, FastEthernet0/0, 0 dependencies R2#show ip route Interface eth 0/2 Affinity property Affinity Attributes and mask 4 10.1.45.5 8 msec 8 msec * Priority 4 : 9375000 Mpls traffic-eng tunnels mpls label range 400 499 Interface loopback TE 's policy routing is no different from traditional policy routing, and it does not change the routing table traffic forwarding based configuration policy. Periodic update. We see that after the BGP neighbor relationship is up , R2 immediately triggers an LSP , and the overload is set before the LSP is cleared . IS-IS and OSPF Bw[0]: *Aug 18 09:06:02.699: SESSION type 7 length 16: !! 10.1.23.2 is also unchanged OAM alarm tag *Aug 18 11:26:02.546: Metric: 10 If a router plurality of distribution on the net, these NET system ID must be the same. The allocated bandwidth is periodically adjusted to be the largest sample for the tunnel since the last adjustment Router ospf 100 Router ospf 1 This time, we do some tests, R1 configuration area-password and R2 are not the same configuration. In this way , although the neighbor relationship can be established for R1 and R2 , they cannot learn the route of the other party, because neither party recognizes the LSPs . The figure above is a single-area Level1 routing domain. Partition repair: on . 8 bits if the LSP originating router supports the repair area division is set this field Attached bits : the first 4-7 bits, for setting the LSP association with another area available with the following metrics: of . 4 -bit - default; 5th bit - delay; 6th bit - overhead; 7th bit - error Mpls ip Regarding the priority of the tunnel and the verification of the currently available bandwidth: First , the configuration of the tunnel is as follows: With BDR , the DR cannot be preempted, and the DR sends Hello at the normal frequency. R3.00-00 Match ip add 1 router isis Broadcast multi-access link 2.2.2.2/32 Next we R1 on shutdown Fa1 / 0 mouth, then R1 on a look: 2.2.2.2 Record Route: 2.2.2.2(200) 4.4.4.4(403) The SWAP process is well understood. Note that the LSR only processes the top label when it processes the tag data for multiple tags in the tag stack. therefore Ip address 10.1.23.3 255.255.255.0 *Aug 18 04:37:06.239: ADSPEC type 2 length 48: Ip address 10.1.34.4 255.255.255.0 IS-IS !! 2.2.2.2 The metric of the link is unchanged We see a lower priority than 5 of the Tunnel , along with the available bandwidth into a 75-20 = 55M . / / Whether the local will retain all the label mapping messages received from the neighbor in the database *Aug 18 11:26:02.546: 0xE7D9 Net 49.0001.0000.0000.0002.00 0x00000037 ! 10.1.23.3 Pop tag 0 kbits/sec Type escape sequence to abort. Tracing the route to 6.6.6.6 *Mar 1 00:00:32.763: ISIS-Upd: full SPF required The status of IP traffic engineering ...... PLR ( Point of local repair ): Local repair point, this is the head end of the backup tunnel *Aug 18 09:06:07.919: SESSION type 7 length 16: Mpls ip State *Aug 18 09:06:07.919: ADSPEC type 2 length 48: *Aug 18 11:26:02.546: 101 Routing domain IS-IS link type LSP Seq Num LSP Checksum LSP Holdtime Mpls traffic-eng router-id Loopback0 mpls traffic-eng area 0 Comparison of terms between IS-IS and OSPF : Router ospf 1 Set the command: Administrator-weight , and only the IGP metric is used to calculate the shortest path of the tunnel . R1(config-keychain)#exit Generate a default route to this device as the egress route by ATT bit with its nearest L1/L2 router Ip cef The overload router participates in the calculation as the last hop route. Use set-overload-bit to manually set the overload bit. 2 10.1.34.3 [MPLS: Label 303 Exp 0] 856 msec 1012 msec 1072 msec R2.00-00 R1#show ip route Average rate=250000 bytes/sec, burst depth=1000 bytes R1#sh mpls forwarding-table 2.2.2.2/32 Device Internet segment 10.1.xy.0 / 24 , where xy is the device number, X small y large Network 10.1.23.3 0.0.0.0 area 0 Ip address 1.1.1.1 255.255.255.255 Switched State: dynamic path option 10 is active Router(config)# mpls ldp session protection for acl-peer duration sencondes Interface eth 0/0 Only when a neighbor solicitation label mapping message to the local strip prefix , local will announce the label mapping messages to neighbors Label location Interface Tunnel0 Mpls traffic-eng tunnels mpls label range 500 599 The configuration of R4 is as follows: tunnel interface can be configured directly IGP Metric , for example, if the running OSPF , directly in the tunnel configuration mouth ip ospf cost can Therefore, we activate the forwarding adjacency feature on the CISCO IOS router, except that the TE tunnel endpoint router advertises the tunnel as a direct link,ccna exam faq, and also considers the tunnel when it performs the SPF algorithm calculation . And if we modify the IGP of the tunnel port Circuit circuit In preparation, the same label is assigned to one FEC . Traffic belonging to one FEC has the same forwarding mode, forwarding path, and forwarding treatment. By default, if the synchronization is not completed, the IGP does not explicitly know the time to wait before establishing the adjacency relationship. Interface Loopback0 Related standards: Label subobject: Flags 0x1, C-Type 1, Label 0 Ip cef Initial database synchronization is performed after the adjacency is established. 304 R1#show ip route *Aug 18 09:06:07.919: SESSION Ip explicit-path name R2R3R4 enable next-address 10.1.12.2 To add: In the above environment, the loopback interface cost=1 , and the cost of all other physical interfaces =10 . Then if we configure: 101 State: explicit path option 10 is active Router ospf 100 ! Network 10.1.34.4 0.0.0.0 area 0 Therefore, the main functions of RSVP are: We know that by default, IS-IS is level1 area much like a Stub (but allow people to re-advertise external routes coming in, so just say they look like), Area within the L1 router through a default route to reach outside the region, which have A suboptimal path may be generated because he is looking for the nearest L1\L2 router in the region .