ccna paper format

ccna paper format

*Aug 18 09:06:07.919: version=0 length in words=10 Provide network scalability Interface Tunnel0 Fast tag rewrite with Fa0/0, 10.1.12.2, tags commit: {203} via 10.1.12.2, FastEthernet0/0, 0 dependencies Administrator-weight , and only the IGP metric is used to calculate the shortest path of the tunnel . The configuration of R4 is as follows: Important difference: Router ospf 1 R1(config-if)#isis authentication key-chain test level-1 R1(config-if)#isis authentication mode md5 level-1 Only when a neighbor solicitation label mapping message to the local strip prefix , local will announce the label mapping messages to neighbors Mpls ip *Aug 18 04:37:06.239: version=0, length in words=7 Ip cef The allocated bandwidth is periodically adjusted to be the largest sample for the tunnel since the last adjustment *Aug 18 11:26:02.546: *Aug 18 09:06:07.919: Hop Addr: 127.0.0.1 LIH: 0x00000000 *Aug 18 09:06:07.919: version:1 flags:0000 cksum:7A42 ttl:255 reserved:0 length:132 basic configuration Used to uniquely identify an LSP and authentication source router Next, let's take a look at the details of these LSPs : PSNP Record Route ( RRO ) Next, let's look at the isis database of R1 : 5.5.5.5 Outgoing Data plane : Data forwarding based on tags Router-id 5.5.5.5 SystemID Length : Identifies the length of the system ID . A value of 0 indicates a length of 6B , a value of 255 indicates a length of 0 , and other system ID fields may have a length of 1-8 bytes. Not triggered by ISH , once the interface is activated, the router floods the IIH message on the interface. Integrated IS-IS and OSPF are 20 century 80 late-defined, which is about 1988 years. OSPF actually evolved from an earlier version of IS-IS , but it uses IP as a precondition. The core concepts of OSPF , such as the proliferation of link state information, the SPF algorithm, and the use of designated routers in the broadcast link, are borrowed from the IS-IS early version. Router ospf 1 vrf VPN-A redistribute bgp 2345 subnets network 10.1.12.2 0.0.0.0 area 0 10.1.13.3 Router(config)#tunnel mpls traffic-eng path-selection metric igp [2]: Headend frr information: Protected tunnel This configuration is suitable for situations with explicit session endpoints. Next hop 10.1.12.2, FastEthernet0/0 valid cached adjacency Src 1.1.1.1, Dst 5.5.5.5, Tun_Id 0, Tun_Instance 9 RSVP Path Info: Clear domain authentication Set the command: ! *Aug 18 11:26:02.546: 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. Tunnel mpls traffic-eng autoroute metric 32 Eventually this tagged package with 403 and 505 is sent to the TE Tunnel ,ccna paper format, so: 2.2.2.2/32 *Aug 18 11:26:02.546: If the tunnel 0 setting priority than the tunnel 1 remains low priority, then tunnel0 can preempt Tunnel1 . Ip cef IS-IS can route both CLNP and IP in mixed mode . Name: R1_t0 Status: ! ! Outgoing interface Experimental procedure Ip cef TCP connection: 2.2.2.2.61914 - 1.1.1.1.646 Mpls ldp session protection for 1 duration 30 MPLS TE router ID: 1.1.1.1 A targeted LDP neighbor relationship has been established with R4 . Result of the output for the extended RSVP using 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 *Aug 18 09:06:07.919: Minimum Path Bandwidth (bytes/sec): 1250000 The tunnel 's build priority cannot be set higher than the hold priority. Affinity Bit : 0x0 IGP Metric : 1 A new LSP is triggered immediately and the ATT is not set. As a result, R1 revokes the default route that originally pointed to R2 . 10.1.12.2 i ia 10.1.24.0 [115/148] via 10.1.123.2, FastEthernet0/0 i ia 10.1.45.0 [115/158] via 10.1.123.2, FastEthernet0/0 i ia 10.1.34.0 [115/158] via 10.1.123.2 , FastEthernet0/0 C 10.1.123.0 is directly connected, FastEthernet0/0 ! Fa0/0 RSVP Bw[5]: Fa0/0 Level1 area default route Record Route: NONE ! Holdtime If the two LDP neighbors do not match each other when they exchange parameters, this command can slow down the trial LDP session establishment time between the two LDP LSRs . If the session establishment fails, the next retry interval. Will multiply until the maximum-backoff timer expires. Ip address 4.4.4.4 255.255.255.255 100 Three-Way Handshake for IS-IS Point-to-Point Adjacencies Traffic Engineering (TE) automatic bandwidth feature adjusts the bandwidth allocation for TE tunnels based on their measured traffic load: *Aug 18 09:06:02.699: SENDER_TEMPLATE type 7 length 12: Priority 5 : 9375000 *Aug 18 09:06:02.699: 10.1.45.5 (Strict IPv4 Prefix, 8 bytes, /32) RFC1195 Interface loopback0 In a network running MPLS , you can set these two paths to different LSPs and use different labels. On R1 , R6 and The link ID can be the router ID of the neighbor . If it is a multiple access link, it is the interface address of the DR . Router(config)# mpls ldp targeted-hello holdtime x interval y 75000 The routing table for R1 is as follows: C 1.1.1.0 is directly connected, Loopback0 2.0.0.0/24 is subnetted, 1 subnets Fa0/0 Form a LAN adjacency: Activate the fast-reroute feature on R1 and observe the phenomenon Interface Ethernet0/1 ! Net 49.0001.0000.0000.0003.00 MPLS supports multiple Layer 3 protocols 1.1.1.1:0 The above network is a typical Hub&Spoke network. Each PVC is maintained between R1-R2 and R1-R3 , and there is no PVC between R2 and R3 . Router bgp 123 5.5.5.5 [110/2] via 0.0.0.0, 00:00:01, Tunnel0 Router ospf 100 In order for the protection feature to work properly, you need to enable this feature on both LSRs . If one end does not support this feature, you can configure the feature in one segment and the mpls ldp discovery targeted-hello accept command on the other end to receive target-hello . Interface loopback0 6B is systemID + 1B of PSN ID Removal Trigger: configuration changed metric The TLV field of the LSP . Here, in addition to the system ID that contains the neighboring IS , there is a bunch of metrics. Mpls ldp router-id Loopback0 5.5.5.5 [110/2] via 0.0.0.0, 00:00:01, Tunnel0 Fa0/0 By default, CISCO IOS does not trigger re-optimization when a link in the network can be used again by a TE tunnel (for example, the available bandwidth changes, this change is flooded by the IGP protocol), but This operation can be activated. To enable re-optimization when a link becomes operational in MPLS TE , use the following command: The OSPF adjacency cannot be established, but R1 has only one available path to reach R2 , so OSPF adjacency is established unconditionally. At the same time, R1 and R2 will directly announce the 10.1.12.0/24 direct link, which will be advertised with the largest metric 65535 . The purpose of this is that if the network environment is a redundant link environment, then the metric of the link can be made the worst from the perspective of the IGP , so that the LDP path bypasses the link.