ccnp route official cert guide

ccnp route official cert guide

Ip dhcp relay information trusted Use the dynamically learned MAC address to form a secure address entry. Generally, it is 60-240 seconds longer than the invalid timer . If this time also expires, the routing entry is completely deleted. Cisco default 60s (note than invalidtimer multi- 60s ), RFC default 120s Obviously, R2 is preferred to 10.1.12.1 . This is because the first 12 rules cannot be decided. Therefore, the neighbor IP is compared . Therefore, 10.1.12.1 is preferred . Of course, if the 10.12.1 address of R1 is changed to 10.11.12.1 , And on the R2 to do the corresponding modification of the neighbor ip , then R2 to 1.1.1.0 will switch to 10.2.12.1 , because this IP is small Native vlan Neighbor 4.4.4.4 ebgp-multihop 4 Paths: (1 available, best #1, table Default-IP-Routing-Table, not advertised to EBGP peer) Flag: 0x820 RIP update behavior Half-duplex and full-duplex are the concepts of the physical layer, and the different access modes for the duplex mode of the physical layer are the concept of the data link layer, thus forming an important feature of Ethernet: the data link layer and The physical layer is relevant. Consider the case where R2 is RR , and R4 and R5 respectively declare loop Router bgp 1234 Offset-list 1 out 10000 fastEthernet 1/0 Heavy FAQ published Public Route-map test permit 20 match ip address 2 The switch sends data frames according to the discovered outbound interface. Route reflection clusters include reflectors and their clients Trunking Route 11.11.11.0 is introduced on R1 . Router(config-router)# passive-interface int- type int-num 120 The election of the Root Bridge will not be said. Match 100 , 1400 , 300 400, etc. Authentication is identified by setting the address family ID field to all 1s ( 0xFFFF ). Bgp inject-map RP_mingxi exist-map RP_huizong copy-attributes Local network and re-routed routes, LP defaults to 100 , and can be transmitted to other IBGP neighbors within the AS . The LP is unchanged unless the policy is deployed during transmission. All clients in the route reflection cluster should establish IBGP connections with and only with all RRs in the cluster. ? RIPng After the trigger update is enabled, the routers at both ends of the link no longer send routing updates periodically. Of course, another problem arises. If the route in the routing table expires, it will hang, so it is necessary to trigger the update. It must be configured on both interfaces of the link, so that the routing update will be marked permanent for permanent. Compatibility 37 Redistribute connected subnets redistribute rip metric 10 subnets network 192.168.23.0 0.0.0.255 area 0 Since the flash space is very limited, it is recommended to store the file on the TFTP server. When deploying on a TFTP server, be careful to first create an empty file to correspond to the URL in the configuration command . This file is used for dhcp snooping bingding database writes (depending on the device). FastEthernet1/0 Port ID ? Routing policy 50 Metric Bgp connected eigrp Network Next Hop Metric Flag field LSB = TC MSB = TCA Router bgp 64512 Metric MTU is the largest transmission unit, and different systems have different settings and understandings for MTU . RFC1403 BGP OSPF Interaction About sticky secure address Solution: Use distribution lists to circumvent suboptimal path problems 101 The Ip helper-address command is configured on the Layer 3 interface that receives the broadcast discovery packet sent by the client , or "blocks" the broadcast DHCP packet. For example, if it is a Layer 3 switch, use the access. interfacing PC ,ccnp route official cert guide, then you should configure the VLAN 's SVI interface. Neighbor R3 filter-list 1 weight 4000 Preferred routes sent by EBGP neighbors (relative to IBGP neighbors), preferred federated EBGP routes in federated EBGP and IBGP The problem that the static route associated with the outgoing interface is re-released. Access-list 1 permit 192.168.12.0 router rip Offset list Switchport mode access switchport port-security Hardware-address hardware-address type Router bgp 64513 no synchronization The default priority is 128 , the range is 0-255 , the smaller the better Show ip dhcp database Displays recent activity on the DHCP database Match ip address prefix-list 1 router bgp 300 The VTP protocol sends a VTP advertisement on the trunk link through the multicast address 0100-0CCC-CCCC . Port Interface fast0/1 -------------- Detailed rules Acl-match none —Does not log packets that match ACLs. Second column > Optimal path selected by BGP algorithm 100 i // is equivalent to route-map not matching ( permit ) any entry, so all details are released Next Hop Port-Security violation penalties We look at the above picture, the external detail route 172.16.32.0 – 39.0/24 , and the summary route 32.0/21 are introduced into OSPF by R1 , now Migrate to the Established state if you receive a keepalive message from the other party (empty), in other words, the MED will not be transmitted out of this AS Remove the command configured on SW1 in step 2 to restore the experimental environment. OSPF RouterID : 1.1.1.1 ( Routing Table ) , the routing table is loaded with routing entries ( routes ) learned by the router . The routing entries are composed of routing prefixes (destinations associated with routes), routing information sources, outgoing interfaces, or next hop IPs . The router obtains routing entries and maintains its own routing table in a static or dynamic manner. routing Elect a root port on each non-root bridge The longest match Load balancing methods However, if the R1 release carry on a tag external routes, and R2 re-released on OSPF into RIP , tag lost: Let's take a look at this route 100.0.1.0 : Rl , R2 , R3 running the OSPF , R3 routing table is as follows: When a BGP router sends a route update to its EBGP neighbor, it cannot carry the LP attribute. The LP value of the EBGP route received by the peer is empty. In 802.1q the native vlan is untagged, using Dot1q switches all unmarked frame is forwarded to the native vlan in the ISL on all data frames, including native vlan encapsulation, so if the package is not received The data frame will be discarded (the ISL does not have the concept of a native VLAN ). [Experiment 3 ] Cancel detailed route suppression for a specific neighbor IP prefix lookup IPv4 mtrie 8-8-8-8 optimized Input fast flags 0x0, Output fast flags 0x0 ifindex 3(3) On Demand stub Routes Atomic character Default route GLBP IP routing troubleshootingDUAL AS provides a migration solution: Allow R2 's BGP process to take into account both AS numbers, 200 and 201 , of which 200 Match community 11 Preferably the BGP NEXT_HOP nearest route Isis Of course, it is ok to filter the prefix list in the in direction on R2 . 1 : Request message, requesting all or part of the routing information from the neighbor; There are classes and classless route lookup mode OSPF TAG Overview First ensure that R1 , R3 to 10.1.1.0 are routed, and test on R2 : Abc+d Let's look at the picture and deploy a two-way re-release on R2 and R3 . Network 12.12.12.0 mask 255.255.255.0 RIPng Neighbor maximum-prefix xx restart 2 Configure BPDU is 0x00 and TCN BPDU is 0x80. The summary of the route is actually done by the operation of the subnet mask. For the following example: Comparative principle Match ip address prefix-list 1 route-map RP2 permit 10 This is the ICMP redirect message sent by R1 to R3 . Note that the Gateway address field in the header is filled with the next hop IP that is closer to the destination than the destination . Experiment 1 : Basic experiment 100 i Incomplete No synchronization If the number exceeds xx , disconnect the BGP connection with the neighbor and reconnect after 2 minutes. 20 DMZ-Link Bw 193 kbytes UDLD Access-list 1 permit 10.1.1.0 0.0.0.255 route-map test permit 10 The configuration of R2 is similar to the above. The key is to look at the configuration of R3 : CISCO Private Agreement We know that in a campus network, the largest number of devices should generally be switches (Layer 2 and Layer 3 switches), of which the number of Layer 2 switches is mostly. The Layer 2 switches are in a typical Layer 3 network structure. At the "access layer", the main task is to provide access to the PCs and users of the terminal , and to divide the VLAN isolation broadcast domain, and then run STP to provide a Layer 2 anti-ring mechanism. A small and medium-sized campus network, the number of two-layer switches is often hundreds. These devices are usually unpacked at the customer site, and are usually commissioned by engineers on the site with a console cable.