cisco practical exam

cisco practical exam

In an actual environment, MPLS TE is often deployed only in a few core nodes . The edge node cannot sense the existence of the TE tunnel and can only select routes according to the traditional IGP . ! ! 120s Router ospf 1 10.1.12.1 Provide a loop-free network Interface fast0/0 Default change threshold (bandwidth occupancy): Pop tag ADV Router R1(config)#key chain test *Aug 18 04:37:06.243: *Aug 18 09:06:07.919: Error Value: 0x5 (No route available toward destination) Mpls traffic-eng tunnels mpls label range 200 299 55.55.55.55 [110/31] via 10.1.23.3, 00:03:44, Ethernet0/1 TE metric: 1, IGP metric: 1, attribute_flags: 0x0 *Aug 18 09:06:07.919: version=0, length in words=7 Ensure reliable diffusion of LSPs on point-to-point links 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. Ip address 2.2.2.2 255.255.255.255 ID: path option 10 [248] Routing information diffusion in point-to-point links !! TE metric , the default is equal to the following IGP metric Tag Conceptual introduction 6.6.6.6/32 101 Take a look at the routing table for R1 : The configuration of R1 is as follows (other basic configurations are omitted directly): Obviously due to the lost and R3 direct link, R1-R3 between the LDP adjacency hung up, in terms of natural LIB table, before R3 pass over the bundled label will be lost, and now, if R1-R3 Between the link replies, they have to re-establish LDP adjacency and resend the label bundle. Forwarding Adjacency forwarding adjacency Pop tag 75000 And the link TLV is described for carrying a series of MPLS TE sub-unit of the link TLV , regarding the sub- TLV is described as follows: 75000 Level2 area default route (conditional advertisement) 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 ) Fast tag rewrite with Fa0/0, 10.1.12.2, tags commit: {203} via 10.1.12.2, FastEthernet0/0, 0 dependencies Type : 0x8848 (Multicast) The upper layer carries MPLS , looking for LFIB Bandwidth parameter is the bytes as a unit Activate the MPLS TE extension for each router's OSPF and manually set the RouterID for MPLS TE . Number of Links: 3 Discovery Sources: *Aug 18 09:06:07.919: IS Hops:1 IP internal reachability information Domain-password 3.3.3.3 5.5.5.5 Tun ID: 0 Ext Tun ID: 1.1.1.1 R2.00-00 Mpls traffic-eng router-id loopback0 mpls traffic-eng area 0 Going f.0/0 , the outbound tag used is 200 , while 10.1.35.5 accesses 1.1.1.1 and goes to F1/0 , and the outbound tag used is 400 . Record_route 0x80000018 0x001C01 1 Sub Pool Access-list 1 permit 5.5.5.0 route-map test permit 10 Remote binding: tsr: 2.2.2.2:0, tag: imp-null remote binding: tsr: 3.3.3.3:0 , tag: 301 *Aug 18 09:06:07.919: SESSION_ATTRIBUTE type 7 length 16: Configuration example 2 : R2(config)#key chain test R2 (config-keychain)#key 1 It is. At this moment: Network Entity Title is the last byte 0 of the NSAP , it is a device identification ( the NSAP port number is 0 thing). So every router is The configuration of R2 is supplemented as follows: Network 10.1.34.3 0.0.0.0 area 0 For Level1 router , the area number is required to be the same. L1/L2 router Ip cef L1/L2 router As I said earlier, the NSAP address has an area adddress part that is longer, so when we get an address, how do I know which part of the address corresponds to what? Cisco IOS software from the right explanation NSAP address (here use NSAP of OSI format). First, counting from the right, the first B is NSEL , the left 6B is SystemID , and the rest is AreaID . Interface Loopback0 Note that the main tunnel is strongly recommended to be explicit . If the primary LSP is dynamic , the primary LSP is down. (For example , the E0/1 port of R2 is shut down ), the switch will be switched to the backup LSP . However, if the E0/1 port of R2 is restored at this time ,cisco practical exam, after testing on the CISCO IOS router, it is found that the traffic cannot be switched back to the primary LSP . There is no such problem with the explici path .