ensurepass ccna

ensurepass ccna

LAN Priority: 64 Format: Phase V 959 Test . 6 : SET-overload-External 'bit the suppress interlevel *Aug 18 09:06:07.919: TIME_VALUES type 1 length 8 : Router(config)# mpls ldp neighbor xxxx labels accept acl We see that R5-PE2 assigns a 505 label to VPN customer route 6.6.6.6 . Or Tunnel Id R1_t0 Local binding: tag: 104 Mpls traffic-eng tunnels ip rsvp bandwidth Link connected to: a Transit Network Router-id 2.2.2.2 Note: a L1 / L2 router if the other area router adjacency relationship, it will to this area of the L1 router advertisement himself outlet, the specific method is the raw cost region L1 LSP when packets ATT bit Set 1 Ip address 4.4.4.4 255.255.255.255 LOOP Detection Explicit empty label Ip rsvp bandwidth 2000 This command sets the total reservable bandwidth of the interface to 2M. Tunnel mpls traffic-eng autoroute announce tunnel mpls traffic-eng priority 7 7 NSAP Tag request object There are two types of LSPs : Level1 LSP PDU and Level2 LSP PDU. Interface eth 0/0 1.0.0.0 Hello Host 0 kbits/sec Ip address 3.3.3.3 255.255.255.255 RFC 3373 *Aug 18 09:06:07.919: The configuration of R5 is supplemented as follows: Local label info: global/16 10.1.23.3 [MPLS: Label 300 Exp 0] 4 msec 0 msec 4 msec 0x2D6E R4.00-00 75000 Solution: R1 and R4 use the loopback interface to establish IBGP neighbor relationships. In fact, this is a metric trick, but when we are thinking about it, remember to take the virtual path of the tunnel into consideration. Frame-relay map ip 10.1.123.1 201 broadcast DIS is preemptible, and there is no backup DIS , which means that when the DIS hangs, it is immediately reselected. (Tunnel0) Destination: 4.4.4.4 Based IP traffic engineering is connectionless, not an explicit path ( Explicit routing ) R1#show ip cef 4.4.4.4 *Aug 18 09:06:07.919: Path MTU: 1500 LDP inbound label binding filter R2 . But why? The reason is that the label assigned by R2 to route 10.1.12.0 is PoP , because 12.0 is the directly connected network segment of R2 , and there is a second-end hop pop-up mechanism. Then this IP packet is R2 to stop the meal , because R2 does not have 6.6.6.6 and 5.5.5.5 routing. How to do? Router(config)#interface tunnel0 L1 router re-releases external routes into IS-IS *Aug 18 11:26:02.546: 0xA538 Network 10.1.45.4 0.0.0.0 area 0 ! Router#show mpls traffic-eng topology router#show mpls traffic-eng tunnels The IGP will advertise the link with normal IGP metrics. At this time, the traffic that traverses this interface is the traffic for label switching. Basically, if the LDP session is not established, OSPF will not establish adjacencies on this link, and HELLO will not be sent at all (of course, there is a basic word here, that is, there are two cases) . On the L1/L2 router , the routes of the subordinate Level1 area are summarized, so that the summary route is learned in the backbone or level2 area , and the configuration is as above. Mpls traffic-eng router-id Loopback0 mpls traffic-eng area 0 See the process of label exchange? Prove that the data is indeed on the TE tunnel . Configuration command Device Configuration MPLS technology architecture 0x00000029 Advertising Router: 1.1.1.1 LS Seq Number: 80000001 Router ospf 1 The configuration of R2 is as follows: Access-list 1 permit 5.5.5.0 route-map test permit 10 TE can provide a solution to avoid link overload by controlling traffic or partial traffic. Let's make a comparison: Comprising one or more routers is configured on the source IP address, the CISCO IOS in Maximum reservable bandwidth : 9375000 Number of Priority : 8 Sender_Template Record Route: NONE DIS MPLS LDP-IGP synchronization can be used to solve this problem. Note that the MPLS LDP-IGP solution cannot be used for BGP label distribution. Hostname: R1 IP Address: Metric: 10 IS-IS can route both CLNP and IP in mixed mode . LDP discovery sources: Configure the destination of the tunnel Network 10.1.23.3 0.0.0.0 area 0 20. IGP System ID: 2.2.2.2 Expense metric is optional. The transmission cost of the link is not supported. 1194 Exit Ip explicit-path name R2R4R5 enable next-address 10.1.12.2 Path-number } } [lockdown] LSP Seq Num Router(config-router)#mpls traffic-eng area x Interface eth 0/0 Network 10.1.34.4 0.0.0.0 area 0 IS-IS packet format *Aug 18 09:06:07.919: Tun Dest: 5.5.5.5 Tun ID: 0 Ext Tun ID: 1.1.1.1 Intermediate system adjacent router *Aug 18 11:26:02.546: SESSION Router ospf 1 RFC 2763 Ip address 10.1.34.3 255.255.255.0 Interfaces: 0x00000011 10.1.34.4 [MPLS: Label 400 Exp 0] 0 msec 12 msec 8 msec Interface loopback0 Interface eth 0/0 System ID , larger than Only the label mapping message of the route prefix advertised by the next hop neighbor of the optimal route is saved locally. Local binding: tag: 104 IS-Extended R2.01 *Aug 18 09:06:02.699: Tun Dest: 5.5.5.5 Tun ID: 0 Ext Tun ID: 1.1.1.1 ! Phenomenon analysis L1/L2 router re-releases external routes into IS-IS ( to level-1-2 ) For IS-IS LSP messages and CSNP and PSNP, see the IS-IS Link State Database chapter. End host. For example , the ISO CLNP workstation searched by the ES-IS protocol . ! R1#show mpls ldp neighbor 4.4.4.4/32 4 10.1.34.4 NSEL is 00 ( 1B from the right ) The system ID is 0000.0c00.1111 The area ID is 39.0f01.0002 Tunnel mpls traffic-eng path-option 10 dynamic Used to establish and maintain adjacent relationships BDR NSAP FIB 3 6.6.6.6/32 LSP *Aug 18 09:06:07.919: Incoming PROXY_PATH: 0x8000001A 0x002ED2 0 The configuration of R4 is modified as follows: Show isis database on R1 ( ZeroAgeLifetime , during which only the header of this LSP is reserved ), it will be deleted when this time is reached. Network 5.5.5.5 0.0.0.0 area 0 Network Service Access Point . It is a conceptual point on the boundary between the network layer and the transport layer. It is the location where the OSI network layer serves the transport layer. Each transport layer entity is assigned a unique NASP address. 75M MPLS configuration ( frame mode ) Note: LDP or TDP only generates labels for routing entries of the IGP protocol, and does not generate labels for BGP routing entries. Outgoing tag or VC State: Oper; Msgs sent/rcvd: 19/19; Downstream Up time: 00:07:56 information routerID Tun Sender: 1.1.1.1, LSP ID: 521 The area address groups configured on the router are listed. Auto-bw: disabled But if we modify the configuration on R1 : All Layer 2 routers must have a unique system ID within the domain (support) does not announce the direct connection between R1-R5 and R4-R6 into OSPF Bytes Label Network 10.1.45.5 0.0.0.0 area 0 Tunnel destination 5.5.5.5 Interface eth 0/1 OSPF 's LSA Mpls traffic-eng tunnels ip rsvp bandwidth Net 49.0001.0000.0000.0002.00 *Aug 18 09:06:02.699: Path MTU: 1500 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 ) The introduced IP route changes. Continue to show it: R1 # show mpls forwarding-table R1 of LFIB table Two modes: frame mode ; ATM mode ( cell mode ), we mainly study frame mode Version : value is 1 In this way, R2 will ignore the LDP hello packet received from the R1 on the interface , and then the LDP adjacency between R1-R2 will DOWN after a while. ! Keep priority Tunnel mpls traffic-eng autoroute announce tunnel mpls traffic-eng priority 7 7 Router ospf 1 The configuration of RouterA is as follows: description ! Not supported yet Neighbors should use PSNP to confirm this LSP Ip address 5.5.5.5 255.255.255.255 203 Assign and distribute labels SRM and SSM are used to coordinate diffusion and database synchronization value HELLO PDU (ESH , ISH and IIH) R1#show mpls traffic-eng tunnels BGP route delivery in MPLS environment AutoBandwidth Net 49.0001.0000.0000.0003.00 No output feature configured Time since created: 5 hours, 7 minutes Time since path change: 12 seconds Local Label Ip cef !! Only one interface activates MPLS TE Types of 75000 Mpls ldp router-id loopback0 mpls label range 300 399 interface fast0/0 *Aug 18 09:06:07.919: BGP routing problem, well, now we use the loopback interface on R1 and R4 to establish IBGP adjacency, the problem is solved. At this time R4 , the go 5.5.5.5 next hop of the R1 of Loopback port addresses, R4 at destined to 5.5.5.5 of the IP when the pressure package label, use is 1.1.1.1/32 routing tag, The same is true for R3 and R2 , then the label package can be opened through 1.1.1.1/32 . Mpls label rangempls label range 300 399 interface fa0/0 75000 An IBGP adjacency is established between R1 and R4 . The IBGP adjacency is established on the physical interface. Established between R1 and R5 , R4 and R6 Opaque ID: 0 By default TE metric equal to the IGP Metric (This means that, without using the above command interface disposed in the physical, TE metric equal to the IGP Metric ) Link connected to: a Transit Network ! Interface eth0/0 ! 75000 ! Complete basic IP configuration (configuration omitted) ! Ip address 10.1.12.2 255.255.255.0 Ip address 1.1.1.1 255.255.255.255 Label (Link ID) Designated Router address: 10.1.12.2 (Link Data) Router Interface address: 10.1.12.2 Number of TOS metrics: 0 You see that we have IS-IS metrics in many places in the LSP , for example: Replaces both IP Reachability TLVs ( 128 and 130 ) . Uses wide metrics FIB Network 10.1.34.3 0.0.0.0 area 0 Appears only in the LSP of the L1 router . List the adjacent L1-router and the end ! OSPF 's LSA 10.1.34.4 [MPLS: Label 400 Exp 0] 0 msec 12 msec 8 msec First of all, these three commands all work on the route obtained by the route calculated by the TE tunnel with the autoroute feature enabled . The above command changes the cost of the tunnel interface itself . Tspec: ave rate=2000 kbits, burst=1000 bytes, peak rate=2000 kbits RSVP Resv Info: R1#show mpls traffic-eng tunnels This inbound label packet,ensurepass ccna, with a label value of 203 , indicates in the LFIB table of R2 that 203 needs to be exchanged to 300 and then dropped to the next hop. *Mar 1 00:00:32.759: ISIS-Upd: Building L2 LSP Of course, if you are running in a single zone, you can use a full L1 router or a full L2 router solution. Interface tunnel0 Routing information diffusion in point-to-point links Mpls traffic-eng router-id Loopback0 mpls traffic-eng area 0 Bw[1]: 200 Mpls traffic-eng router-id loopback0 mpls traffic-eng area 0 System ID , larger than The configuration of R3 is as follows: SNPA Mpls traffic-eng backup-path tunnel0 IS-IS Adjacency related packets debugging is on R1# RSVP Signalling Info: Outgoing interface Both are link state routing protocols, which require routers in the area to exchange link state information, and link state information is collected in the link state database. In CISCO IOS , a re-optimization of a TE tunnel is done every 1 hour by default . The port in TCP/IP . LSP midpoint frr information: LSP identifier Clear text area certification --------------- 0 Or Tunnel Id L1/L2 router , which holds two independent LSPDs . The Layer 1 and Layer 2 routing processes are running at the same time . At a layer LSDB maintains the first in a layer LSP information simultaneously to other L1 router advertisement which is an outlet of the region (the L1 router to form a default route one point to the area border routers according to this announcement); it support of two layers function in the trunk with the other router communication, independent of the first and maintains a layer LSDB of 2 layer topology database.