ccna security braindump

ccna security braindump

! Device Internet segment 10.1.xy.0 / 24 , where xy is the device number, X small y large For example, in the above topology, R1 establish a to R4 of TE the Tunnel , all routers have declared their loopback into OSPF . All interfaces cost are 1 . 102 Frame-relay map ip 10.1.123.2 102 broadcast 0 kbits/sec Link IP Address: 10.1.12.2 Mpls traffic-eng tunnels ip rsvp bandwidth The sub-TLV of 0-244B is mainly used for MPLS TE. ! ! 120s R1#traceroute 4.4.4.4 IS-IS Level-2 Link State Database: L1/L2 router re-releases external routes into IS-IS ( to level2 ) A pseudonode represents a broadcast multi-access network (including all ISs connected to this LAN ), which actually "as a router" (above, gray router) in the network. In other places, this is a whole. So does this whole have to generate an LSP ? This LSP is generated by the DIS . This bandwidth is reserved for the TE tunnel . If the bandwidth value is not added after the command, the default is 75% of the interface bandwidth. R2-PE1#show mpls traffic-eng tunnels 4 Interface eth 0/1 Virtual link !! The link to the problem , the metric is set to 65535 Tunnel mpls traffic-eng bandwidth 2000 Signalling: connected Interface loopback0 Interface Tunnel0 OSPF Router with ID (1.1.1.1) (Process ID 1) *Aug 18 09:06:07.919: Complete sequence number packets ( CSNP ) Complete sequence number packet Isis password Network 10.1.23.3 0.0.0.0 area 0 The IS-IS related interface is Up or Down . Et0/1 IGP metric: 1 N/P Integrated IS-IS configuration !! Note area0 and area1 must activate MPLS TE IS R1.00 R1#sh mpls traffic-eng topology 1.1.1.1 (1.1.1.1 is a local router ) You see that we have IS-IS metrics in many places in the LSP , for example: 0/0/0 Configuration command Ip address 10.1.123.2 255.255.255.0 Local Label InLabel : - Prefix ! Tunnel mpls traffic-eng autoroute announce IS-IS routers belong to only one specific area Name: R1_t0 Status: 1.0.0.2 If the payload of the MPLS is not an IPv4 packet or an IPv6 packet, load balancing is performed by viewing the value of the bottom label. Otherwise, the interface may be considered in MPLS-LDP Discovery Transport interface address ,ccna security braindump, the Transport Address configured as Direct interface IP address. ! Local tag Mpls traffic-eng tunnels mpls ip Mpls traffic-eng router-id loopback0 mpls traffic-eng area 0 Connection TCP: 2.2.2.2.31044 - 1.1.1.1.646 , indicates that the LDP connection is built on TCP 's 1.1.1.1 source port 646 , to the destination 2.2.2.2 of 31044 ports. Because the 2.2.2.2 address is large, it is the initiator. Then, OSI routing begins. When an ES wants to send a packet to another ES , it sends the packet to its directly connected network. 0 kbits/sec Error notification Three-way handshake mechanism: Ip address 10.1.34.3 255.255.255.0 i*L1 0.0.0.0/0 [115/10] via 10.1.123.3, FastEthernet0/0 Bw-based OutLabel : FastEthernet1/0, implicit-null RSVP Signalling Info: Network 2.2.2.2 0.0.0.0 area 0 DIS advertises all neighbors in the LAN in the "pseudo-node LSP " (similar to the LSA in OSPF ) Extended OSPF and IS-IS to TE required information flooding in the network, then Tunnel head-end router can build your own TE It can be seen that ES-IS plays a role in the CLNS network environment as if the ICMP , ARP and DHCP protocols in the IP network work together. 3.3.3.3/32 5.5.5.5/32, version 22, epoch 0, cached adjacency 10.1.34.3 Control metric through dynamic routing protocol to affect routing routing DIS is preemptible, and there is no backup DIS , which means that when the DIS hangs, it is immediately reselected. In CISCO IOS , a re-optimization of a TE tunnel is done every 1 hour by default . *Aug 18 09:06:02.699: peak rate =250000 bytes/sec 10.1.34.4 [MPLS: Labels 404/505 Exp 0] 0 ​​msec 0 msec 0 msec 100 104 R3 found that the inbound tag 300 's tag package, the outbound tag is a POP , so he pops the top tag (actually a layer), and then directly throws the popped data to 10.1.34.4 , note that this time it does not need Find the FIB table again because there is already a next hop in the LFIB table. Eventually this data was passed to R4 . Sender_Template Regional separation The configuration of R2 is as follows: Complete basic IP configuration (configuration omitted) Restart signaling for IS-IS Interface Serial0/0 Down Thresholds: 100 99 98 97 96 95 90 85 80 75 60 45 30 15 The TLV field of the LSP . Here, in addition to the system ID that contains the neighboring IS , there is a bunch of metrics. After the MPLS LDP-IGP synchronization is activated on an interface , the IGP will advertise the metric of the link to the maximum until the synchronization is complete or the LDP session is successfully established on the interface. In OSPF , the metric is up to 65535 . In this way, it can be guaranteed that no path will pass through the interface when LDP is in the disconnected state.