examcollection cisco exams

examcollection cisco exams

Net 49.0001.0000.0000.0003.00 Bw-based Min unit=0 bytes, max pkt size=2147483647 bytes 2.2.2.0 [115/20] via 10.1.123.2, FastEthernet0/0 3.0.0.0/24 is subnetted, 1 subnets Network Next Hop In label/Out label Redistribute connected level-1 Set-overload-bit on-startup <5-86400 sencondes> How to view opaque LSA-10 on CISOC IOS router ? Router isis Bytes tag switched Router ospf 1 Metric: 10 [Note] If the router receives a tagged packet and the top tag cannot be found in the local LFIB , the CISCO IOS will discard it. 5.5.5.5 Tun ID: 0 Ext Tun ID: 1.1.1.1 Router(config-router)#mpls traffic-eng area x 0x00000037 Oper: up Src 1.1.1.1, Dst 4.4.4.4, Tun_Id 0, Tun_Instance 39 RSVP Path Info: FastEthernet0/0 (ldp): xmit/recv Enabled: Interface config Shared-Explicit (SE) FLOWSPEC Type 9 flooding range only on this link The label mapping message that is advertised locally is meaningful to the global . The labels corresponding to the same FEC advertised from different interfaces are the same. Oper: up ATT/P/OL Network 10.1.34.3 0.0.0.0 area 0 mpls traffic-eng router-id loopback0 mpls traffic-eng area 0 202 In the routing table, R3 goes to 1.1.1.1 and uses 10.1.34.4 and 10.1.23.2 equivalent load balancing. Interface loopback0 *Aug 18 04:37:06.243: Tun Sender: 1.1.1.1, LSP ID: 20 *Aug 18 04:37:06.239: version:1 flags:0000 cksum:DEB3 ttl:255 reserved:0 length:132 Route redistribution Therefore, in an NBMA network, such as a frame relay environment, it is strongly recommended to use the P2P sub-interface to run ISIS . IS Ip router isis .......................................... R2 will immediately trigger a new LSP and clear the ATT , which causes R1 not to use R2 as the next hop for the default route. Interface eth0/0 Dynamic hostname mapping By default tunnel0 port cost = 1000 , we can tunnel interface cost modification is 1 ; then R1 is e0 / 1 port cost to The VRF IGP running between PE and CE is OSPF , using process number 1. PATH Ip router isis interface Serial0/0 TOS 0 Metrics: 1 3.3.3.0 [115/20] via 10.1.23.3, Serial1/0 We know that IS-IS actually recognizes two types of networks, one is peer-to-peer and the other is broadcast multi-access network. For NBMA , such as frame relay networks, IS-IS deployment should be cautious, to see what will be wrong: Device Internet segment 10.1.xy.0 / 24 , where xy is the device number, X small y large RFC3209 RSVP-TE Extensions to RSVP for LSP tunnels describes the extension of MPLS TE function by RSVP protocol . IS-IS packet format 2 Interface Ethernet0/0 The configuration of R2 is as follows (the tunnel is not configured temporarily ): To add: In the above environment, the loopback interface cost=1 , and the cost of all other physical interfaces =10 . Then if we configure: 4.4.4.4/32 *Aug 18 04:37:06.239: parameter id=127, flags=0, parameter length=5 *Aug 18 09:06:07.919: 10.1.24.2 (Strict IPv4 Prefix, 8 bytes, /32) [6]: Basic Run OSPF on the entire network to announce direct connection and loopback interface. For the LAN interface,examcollection cisco exams, a 1- byte circuit ID is appended to the 6- byte SysID of the specified intermediate system ( DIS ) to form a 7- word. There are three HELLO packages in IS-IS : Recommendations for Interoperable Networks using IS-IS UP Generating a pseudo-node, node action by the pseudo-elections DIS play LSP Of course, the above method is not safe. Therefore, in special cases, we may want the L1\L2 router to conditionally set the ATT bit and set it more controllable. Then we can associate the route-map and match a specific one in the route-map . Routing, as long as this route is in my routing table, route-map is satisfied, I will set ATT . The boundary of the area is on the router We started CEF on R3 . In fact, in CEF , the default load balancing method is destination-based load balancing. CEF 's 101 *Aug 18 09:06:07.919: 1.1.1.1 (Strict IPv4 Prefix, 8 bytes, /32) Ip vrf VPN-A rd 2345:6 HOP Current LSP: Configure the destination of the tunnel 1bit is the bottom of the stack (this position is 1 , the last label. You can press a multi-layer label on a data packet, and the Bos bit of the last label is set to 1. When processing to this layer, the upper-layer data packet is normal data. package.) Router(config)# mpls ldp discovery holdtime seconds Designated Intermediate System designated intermediate system To form an adjacency relationship. IGP System ID: 2.2.2.2 Then we wait for the BGP neighbor relationship on R2 to be established. You can debug it: LSP IPv6 , then it must publish routing information with this NLPID value. The configuration of R2 is as follows: Ip address 10.1.255.1 255.255.255.255 Tunnel mpls traffic-eng bandwidth 60000 75000 Type 1 length 8 : 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 . (Link Data) Router Interface address: 0.0.0.13 Number of MTID metrics: 0 General Parameters break bit=0 service length=8 RFC 3719 L1 TE tunnel reoptimize Experiment 1 Router ospf 1 MPLS features !!tunnel establishment and retention priority // Prerequisites for binding a label to a route prefix locally 5 10.1.15.5 1564 msec 1124 msec 1484 msec Interface fas1/0 Mpls traffic-eng router-id loopback0 mpls traffic-eng area 0 Default metric The global configuration command metric-narrow can be restored to the original default configuration. State: Oper; Msgs sent/rcvd: 19/19; Downstream Up time: 00:07:56 Interface fa0/0 10.1.12.2 Reservable Bandwidth[2]: Ip cef R3#show ip cef exact-route 10.1.35.55 1.1.1.1 ! The default on the point to point link 10S sent once IIH . LSP Tunnel R1_t0 is signalled, connection is up !! means from 13.1 to 34.3 and then to the local ( 34.4 ) 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. Fa0/0 Router(config)# mpls ldp neighbor [vrf vpn-name] ip-addr targeted [ldp | tdp] 10.1.45.5 5.5.5.5 Active Path Option Parameters: The metric is 31. The calculation method is of course very simple, as follows: Designated Intermediate System designated intermediate system In-label Out intf/label IGP System ID: 2.2.2.2 !! Don't forget the mapping of CLNS [3]: 75000 kbits/sec CSPF maximum arbitration Hello interval: 5000 ms; Transport IP addr: 1.1.1.1 LDP Id: 2.2.2.2:0; no host route to transport addr Bw[5]: OSPF divides areas based on interfaces. Routers can belong to different areas. R1(config)#interface fa0/0 OSPF Router with ID (1.1.1.1) (Process ID 1) NET Interface eth 0/0 Router isis IDP and DSP can be borrowed from the concept of IP inside. IDP has something like the main network number. DSP has something like subnet number and host IP . Of course, the meaning of this IDP is relatively complicated. See The following figure: Router-id 3.3.3.3 Tib entry: 2.2.2.2/32, rev 6 Router-id 3.3.3.3 Mpls traffic-eng tunnels ip rsvp bandwidth Tspec: ave rate=20000 kbits, burst=1000 bytes, peak rate=20000 kbits RSVP Resv Info: The actual CLNP data is encapsulated in the CLNP header and then encapsulated in Layer 2. Reservable Bandwidth[3]: PUSH is also similarly understood, only for top-level label operations, first the inbound top-level label TTL249 is first decremented by 1 , then the newly pushed label header TTL 722 The path calculation of the MPLS TE tunnel requires relevant information to be performed. Then we need to use a link state routing protocol to flood the link information to all routers running TE in the network . After collecting the information, the TE router establishes its own MPLS TE Database .