ccna test bank

ccna test bank

The configuration of R2-PE1 is as follows: Refresh Period (msec): 30000 O Interface eth 0/0 The overload-bit will not be cleared until the BGP convergence is completed . This feature is not particularly recommended. Feeling not very reliable. Bandwidth: 0 kbps (Global) Priority: 7 7 Affinity: 0x0/0xFFFF Metric Type: TE (default) IS-IS packets are encapsulated in data link layer frames. 75000 R1.00-00 AutoRoute Average rate=250000 bytes/sec, burst depth=1000 bytes Interface eth0/0 !! Path error message sent by R2 to R1 O bit 1.1.1.1 0 [521] ! O PSNP 0x00000014 2.2.2.0/24 Routing information diffusion and database synchronization Mpls traffic-eng tunnels ip rsvp bandwidth Frame-relay map clns 103 broadcast no frame-relay inverse-arp !! Neighbor's SNPA , the interface MAC of the other party in the LAN NSAP address re-addressing Config Parameters: In the previous configuration, the loopback of all devices in the device was /32 , so there was no problem. Now let's take a look at R1. Mpls traffic-eng tunnels ip rsvp bandwidth !! Bandwidth requirement is 20M R1(config-keychain-key)#key-string cisco R1(config-keychain-key)#exit IS-IS Level-1 LSP R3.02-00 Tag request object 10.1.12.2 State: explicit path option 10 is active Look at the routing table for R1 : By default, summaries go into Level 2 if no routing level option is indicated. Collects reachable NSAP prefix information, which is only used for inter-area ISO CLNP roads. Basic command *Aug 18 09:06:07.919: Layer 3 protocol ID: 2048 Allocated i/f max flow max sub max Insert ( impose or push ) Current LSP: ...... ...... Physical Bandwidth: Physical bandwidth of the 100000 kbits/sec !! interface OSPF uses different types of LSAs to carry different routing information. 200 The configuration of R1 is as follows ( R2 does not open area password temporarily ): RFC1195 Router router This state has three values: down , init , up SRM : used to control the delivery of LSPs to adjacent routers during the update process. The link ID can be the router ID of the neighbor . If it is a multiple access link, it is the interface address of the DR . Priority 5 : 9375000 The router in Lan establishes an adjacency with all other routers in the same LAN with the same area ID and hierarchy . 0x4769 View message Outgoing Tunnel mpls traffic-eng path-option 10 dynamic Ip address 1.1.1.1 255.255.255.255 Mpls traffic-eng tunnels ip rsvp bandwidth *Aug 18 11:26:02.546: Verify and view It is. At this moment: LDP IP before 4B is when there is a loopback when interfaces, loopback maximum interface IP , if there is no lp interface, is the largest active physical interface IP , use the following command to change: Now we will complete the following configuration on R2 : Router ospf 100 Ip cef 569 Allocated i/f max flow max sub max TE tunnels are an aggregation of traffic flows of the same class (bandwidth , etc.) which are placed inside a common MPLS LSP ISO 9542 The routing table of R3 is as follows (omit direct route): NSAP can be understood as something like an IP+ port number. 301 Mpls traffic-eng router-id loopback 0 mpls traffic-eng level-1 ! *Aug 18 09:06:07.919: 10.1.45.4 (Strict IPv4 Prefix, 8 bytes, /32) *Aug 18 04:37:06.239: parameter id=127, flags=0, parameter length=5 Tunnel mpls traffic-eng path-option 10 dynamic Mpls traffic-eng tunnels ip rsvp bandwidth It can prevent the structure of the core transmission network from being exposed due to TTL=0 return error message Redistribute ospf 1 vrf VPN-A match internal external 1 external 2 Tib entry: 10.1.23.0/24, rev 8 The level2 route is injected into the level1 area , and these level2 routes can be summarized on the L1/L2 router . The configuration is as above. CSPF algorithm overview Generated *Mar 1 00:00:32.759: ISIS-Upd: full SPF required Reservable BW (kbps) 10.1.23.0/24 PATH is used to establish and maintain, retain Fa0/0 OutLabel : FastEthernet0/0, 200 RSVP Signalling Info: Network 10.1.23.3 0.0.0.0 area 0 The configuration of R3 is as follows: Ip address 10.1.45.5 255.255.255.0 Wait. Path establishment and maintenance Reservable Bandwidth[5]: The CSPF calculation is performed by the head end of the tunnel , and the result of the calculation is a string of IP ( path of the tunnel ) Basic Experiment 2 ( IS-IS ) Configure the requested bandwidth of the tunnel All routers in the IS-IS routing domain will generate LSPs . The following events will trigger a new LSP : Network 2.2.2.2 0.0.0.0 area 0 *Aug 18 11:26:02.546: Net 49.0001.0000.0000.0003.00 3.3.3.3/32 Interface Ethernet0/0 Min unit = 0 bytes,max pkt size = 1500 bytes 0xA339 RFC1195 10.1.34.3 I mentioned the four metric types of IS-IS . The bits that can be used in each metric are the lower 6 bits. That is to say, the maximum interface metric is 63. We propose several new TLVs to make up for this defect. Mpls ldp router-id loopback0 Path: valid Remote binding: tsr: 2.2.2.2:0, tag: 202 tib entry: 10.1.23.0/24, rev 12 *Aug 18 11:26:02.546: Incoming Resv: !! R2 sends a resv message to R1 Ip cef Route summarization on the L1/L2 router ( to level2 ) Mpls traffic-eng tunnels ip rsvp bandwidth Mpls traffic-eng router-id loopback0 mpls traffic-eng area 0 OSPF checks by embedding the interface MTU field in a DBD packet. A little topic about OSPF in MPLS environment Ip address 10.1.45.4 255.255.255.0 10.1.12.2 4 msec 0 msec 4 msec OSPF divides areas based on interfaces. Routers can belong to different areas. After the configuration is complete, the level 2 LSP sent by R2 will carry the cipher text authentication TLV information (the level 1 LSP is not carried). If this configuration is maintained, we will find that R2 can only learn the R1 release. Routing,ccna test bank, this is because level1 LSPs are not authenticated. After completing this experiment, R3 and R4 complete the configuration. Flooding Protocol: OSPF Header Information:: *Aug 18 11:26:02.546: Create a TE tunnel on R1 , the source is its own loopback0 , and the destination is 4.4.4.4 of R4 . Device Configuration R3.01-00 Interface fast 1/0 Interface Ethernet0/0 RFC1195 75000 *Aug 18 11:31:44.598: Fa0/0 About flooding Mpls ip Priority 4 : 9375000 If the LSP database is too large, send multiple csnp Local tag: 104 First we need a routing protocol that can advertise various network resources (weights, IGP metrics , available bandwidth, link attributes, etc.). This routing protocol must be a link-state routing protocol and must support MPLS TE extensions. We have two Optional, one is OSPF and the other is IS-IS . In the CISCO IOS based "internal for MPLS TE link-state routing protocol extensions " to the TE information to build a TE database , the database contains all enabled MPLS TE characteristics or parameters of the links and the links. Parameters such as bandwidth and link attributes that can be used for MPLS TE are configurable on all links in the network.