ccnp certification dumps

ccnp certification dumps

Average rate=250000 bytes/sec, burst depth=1000 bytes The figure above shows the format of IS-IS packets. The yellow background color is the common field of IS-IS packets. Each packet then has its own additional header field, which is then the TLV . 75000 Then R1 will limit the establishment of targeted session of the peer , is 3.3.3.3 , which is R3 of LDP routerid , in addition, LDP session protection time is 30S , that is to say, 30S If the LDP neighbors yet up, targeted session will fail. Naturally, the protected tag information stored in the LIB is gone. After the basic configuration is completed, since R2 and R3 are L1\L2 routers , for both of them, they will advertise themselves to the local level1 area as a way to go out , by setting ATT in the LSP generated by themselves . we R1 point of view isis database has been able to see out. R1#show isis database The Auto Route is configured on the MPLS TE tunnel head-end router and only affects the OSPF route selection of the head-end router . We see the above output, R1 , R2 , R3 all generate LSP , and the asterisk entry is issued by R1 itself. In addition, there is a special Is-type level-1 metric-style wide 10.1.23.3 [MPLS: Label 300 Exp 0] 0 msec 0 msec 0 msec Here are a few things to note: Ip router isis encapsulation frame-relay Device Internet segment 10.1.xy.0 / 24 , where xy is the device number, X small y large ISO10589 0xE7D9 !! Outbound label 201 , which is given by R2 Traffic Engineering (TE) automatic bandwidth feature adjusts the bandwidth allocation for TE tunnels based on their measured traffic load: Establishment of LIB and LFIB tables Mpls traffic-eng backup-path tunnel0 E 6B is systemID + 1B of PSN ID FastEthernet0/0 (ldp): xmit/recv Enabled: Interface config Ip address 10.1.34.4 255.255.255.0 The previous experiment used IBGP to establish IBGP adjacency on R1 and R4 to help you understand the MPLS environment. At this point for R2 , he has two paths to 5.5.5.5 and 55.55.55.55 . As long as the route prefix is ​​learned locally through the IGP , the route prefix is ​​assigned a label ( locally also assigns a POP label to the direct route ) 4 Does it match, verify that the password is correct, the area ID or something. Label Global Pool *Aug 18 09:06:02.699: 10.1.45.5 (Strict IPv4 Prefix, 8 bytes, /32) 75000 After saving the configuration restart R2 , the R2 after the restart is completed, ISIS lead convergence, but this time bgp Write convergence completion, so R2 resulting LSP in overload set, from R1 the following results can be seen, during this time, R1 is not R2 will be used as the next hop to other networks ( except for the network directly connected to R2 ): Create a tunnel For example, R1 . 01 - 00, where R1 is SystemID (this is the system ID based on the host name ), 01 is the PseudonodeID pseudo node ID , and if it is sent by the pseudo node, it is non- 00 , 00 is the fragment number. *Aug 18 11:31:44.598: Level2 , using the interface level command: isis circuit-type level2 , then R2 and R3 will not advertise these direct links when advertising LSPs in area 49.0001 . So the routing table for R1 becomes: ! Ip address 3.3.3.3 255.255.255.255 Primary lsp path: 10.1.12.1 10.1.12.2 IGP floods TE information when: router We see that on R1 , the outgoing label of the relevant route prefix is untagged . The R1 's routing table temporarily without any change. In this environment now, although R1 still be able to ping through 3.3.3.3 , but in fact has a problem, because it is a direct walk IPv4 packets, rather than the package label. Fast tag rewrite with Fa0/0, 10.1.12.2, tags commit: {203} via 10.1.12.2, FastEthernet0/0, 0 dependencies O 5.5.5.5 [110/31] via 4.4.4.4, 00:23:47, Tunnel0 Local binding: tag: 101 The configuration of R1 is as follows: Mpls traffic-eng tunnels ip rsvp bandwidth In the standard SPF algorithm, there can be multiple equivalent paths to the same destination. We call it ECMP ( Equal-cost Multipath ). Network 10.1.34.3 0.0.0.0 area 0 ! Modify the bandwidth UP/DOWN threshold 0 kbits/sec PLR ( Point of local repair ): Local repair point, this is the head end of the backup tunnel *Aug 18 09:06:07.919: MPLS label header. At the same time, the header of the Layer 2 data link layer will be instructed accordingly. For example, the Ethernet data frame, the TYPE field of the MAC layer indicates whether the upper layer data is an mpls label frame (if it is an IPv4 packet, the value is 0x0800 , if it is a label packet) Then it is 8847 -unicast or 8848- multicast) Reservable Add: The top label is replaced (exchanged) by a new label, and one or more labels are added to the upper layer of the replaced label. 10.1.23.2 If a particular interface does not wish to activate LDP , use no mpls ldp igp to turn off LDP . *Aug 18 09:06:07.919: 10.1.24.4 (Strict IPv4 Prefix, 8 bytes, /32) Consider in detail the details of the adjacency relationship establishment process: Describes all LSP information in the LSP database . MTU , then it is possible to first slice and then pass, and then use this slice number to indicate ( 0 is the first segment, 1 bit second segment, and so on), the maximum length of a single LSP is 1492 bytes, the most Can be divided into 255 pieces. IS-IS performs fragmentation when generating LSPs instead of generating large LSPs first , and then fragmenting them at the network layer (for example, IP ),ccnp certification dumps, thereby achieving the negative effect of reducing CPU resource waste.