ccna certification questions and answers

ccna certification questions and answers

! It is found that a targeted session is established between R1-R3 . Now, let's come back to the Fa1/0 port of shutdown R1 . Test . 5 : SET 'bit-overload-the suppress interlevel Ability to send detail link information , including bandwidth . Replaces IS Neighbor TLV TLV 22 can contain 7 sub- TLVs , three of which contain bandwidth information for TE Interface eth 0/0 OSPF Router with ID (3.3.3.3) (Process ID 1) Router Link States (Area 0) Network 10.1.23.3 0.0.0.0 area 0 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. Bytes tag Outgoing Next Hop Interface Loopback0 Extended IP reachability reachability TLV (type 135 ) 1 1.1.1.1/32 1019 Tspec: ave rate=2000 kbits, burst=1000 bytes, peak rate=2000 kbits RSVP Resv Info: The configuration of R1 is as follows: Hello data unit: sent periodically to determine whether other ISs are running IS-IS , establish adjacencies, exchange LSPs , and synchronize LSDBs . 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 . Prefix Show clns neighbors Outgoing Router(config-if)#mpls traffic-eng administrative-weight ? Mpls traffic-eng tunnels ip rsvp bandwidth All Layer 2 routers must have a unique system ID within the domain Remote binding: tsr: 2.2.2.2:0, tag: 201 Attributes are explicitly assigned to the TE tunnel through administration action. *Aug 18 09:06:07.919: 10.1.45.5 (Strict IPv4 Prefix, 8 bytes, /32) 0x4F65 L Area-password cisco ! Targeted Hello 1.1.1.1 -> 3.3.3.3, active, passive My Address: 10.1.12.1 ! Mpls traffic-eng tunnels ip rsvp bandwidth FastEthernet0/0 Process ID 1, Area 0 0/0/0 *Aug 18 09:06:07.919: HOP type 1 length 12: *Aug 18 11:31:44.598: Detailed information See the process of label exchange? Prove that the data is indeed on the TE tunnel . Physical_bw: 100000 (kbps), max_reservable_bw_global: 75000 (kbps) Options: (No TOS-capability, DC) LS Type: Router Links Src 2.2.2.2, Dst 4.4.4.4, Tun_Id 0, Tun_Instance 6 RSVP Path Info: Fspec: ave rate=0 kbits, burst=1000 bytes, peak rate=0 kbits History: 42000 i L2 5.5.5.0 [115/20] via 10.1.45.5, Serial0/2 *Aug 18 09:06:07.919: Incoming PathError: In TLV ), other messages were not seen. The command is as follows (interface level): 562 For prefix-access-list – the IP access list that selects the destinations for which the labels will be *Aug 18 09:06:07.919: version=0, length in words=7 Clear text area certification Static mapping, when the network size is large, the configuration is surprisingly large. The enhanced features of IS-IS are defined in RFC 2763 , among which there is a mapping definition of dynamic host names. RFC 2763 introduces a new TLV , Type 137 , which is included in the LSP sent by the router participating in the dynamic mapping. Interface eth 0/1 There are three types of PDUs : the IS-the IS of ES-IS and CLNP All routers in a zone must have the same zone ID 1/0/0 Designated Intermediate System designated intermediate system C 0 kbits/sec Et0/1 In this way , when the IP packet is tagged on the border device, the TTL value in the original IP header is not copied , but a 255 value is used instead. 1.0.0.0/24 is subnetted, 1 subnets If the tunnel 0 setting priority than the tunnel 1 remains low priority, then tunnel0 can preempt Tunnel1 . Meanwhile, in order to avoid loops,ccna certification questions and answers, R2 in the area level1 when injected these routes will be marked downbit , As a result, R3 receive this LSP , for these routes, it will not flood the backbone inside. The Chinese translation of the verbatim word is "completely literal." The purpose of this is to preserve the EXP field in order to preserve QoS. The configuration of R1 is as follows: IS-IS Hello message ( IIH PDU ) Interface Address : 10.1.12.1 Admin Metric : 1 The labels constituting the LFIB may not be distributed by LDP , and the RSVP allocation label is used in the MPLS traffic engineering . In the MPLS VPN , Mpls traffic-eng tunnels ip rsvp bandwidth Up time: 00:00:33 Reservable Bandwidth[5]: RSVP extension to LSP tunnel Local binding: tag: 104 Address-family vpnv4 neighbor 5.5.5.5 activate Ip address 10.1.24.2 255.255.255.0 Mpls traffic-eng tunnels mpls label range 200 299 Tspec: ave rate=60000 kbits, burst=1000 bytes, peak rate=60000 kbits RSVP Resv Info: Route summarization on the L1/L2 router ( to level2 ) Ip unnumbered loopback 0 tunnel destination 4.4.4.4 tunnel mode mpls traffic-eng 1.0.0.0 Interface eth0 1/0 My Address: 10.1.12.1 Bytes tag Mpls traffic-eng tunnels ip rsvp bandwidth Ip address 10.1.12.1 255.255.255.0 NSAP can be understood as something like an IP+ port number. Allocation pattern (the Label Allocation) : independent control mode (Independent Control) Mpls traffic-eng tunnels ip rsvp bandwidth Net 49.0001.0000.0000.0004.00 IS-IS adjacency on a point-to-point link UP 28 *Aug 18 09:06:07.919: 1.1.1.1 (Strict IPv4 Prefix, 8 bytes, /32) Interface eth 0/0 Network 10.1.34.3 0.0.0.0 area 0 The configuration of R3 is as follows: Tunnel mpls traffic-eng autoroute announce Mpls traffic-eng tunnels ip rsvp bandwidth Mpls traffic-eng tunnels ip rsvp bandwidth The integrated IS-IS protocol implemented by CISCO was first released during the period 1991/1992 . Since then a series of improvements and extensions have been made. The large-scale development of the IS-IS protocol in major ISP networks began in 1995 , and another important reason was the US government 's interest in ISO CLNS . Although integrated IS-IS has dual routing capabilities, it is interesting to note that most of today's world's largest ISP networks use IS-IS protocols only for IP routing.