ine - ccnp r&s v2 (2015)

ine - ccnp r&s v2 (2015)

If R1 turns on auto-summary and network 10.0.0.0 , the subnet will be automatically summarized to R2. 10.1.13.1 R2 becomes the demarcation point between RIP and OSPF domains. So how can I let R1 learn the route from OSPF and let R3 learn from RIP? Match ip address pref 1 set local-preference 100 s> 172.16.1.0/24 100 i IP policy routing is disabled 100 In the cmd of windows PC , the packet size after ping is the size of ICMP data , ping –l 1472 , and the generated packet is 1500 bytes. Network 100.0.2.0 mask 255.255.255.0 Port-security supports 802.1Q tunnel interface SW1(config)# interface fast0/23 Router bgp 1234 At 1 o'clock, it can be considered that this address represents a broadcast address or a multicast address in the Ethernet, or represents a broadcast address or a function address in TR and FDDI . The next bit is the G/L bit (also known as U/L, where U is global). When this bit is set to 0 , it represents a global management address. R11#sh ip ro 8.8.8.0 summary: 300, ( aggregated by 300 3.3.3.3 ) So match interface is a match with the outbound interface attribute, and this description BGP Deaggregation Static route 20 Affect traffic 12 by modifying the LOCAL_PREF attribute Ip dhcp snooping Any Incomplete ? Learned from other sources (confirm that the source of the route is incomplete), the re-routed origin is the tag : ccnp When the number of prefixes received from the neighbor exceeds the maximum number 300 of 90% (default 75% ), generating a message log Then use set comm-list 1 delete to delete, pay attention to the above community-list writing, use multiple lines, the experimental verification results are in Set native vlan on the trunk Open Shortest Path First (OSPF) Routing Information Protocol (RIP) Route map reference Router ospf1 No synchronization 10.1.23.2 SW1#sh int trunk protocol Pointer to the target: The pointer does not point to the router's direct connection to the destination network or to another router address in the directly connected network , or to the local interface of the link. A router that is closer to the target network is called a next hop router. When the network is normal, the data is forced to go ISP1 , ping 100 remote network data to ISP1 OSPF redistributed directly connected interface default cost20 ; redistributed static route default cost20 ; using the default-metric can modify and redistribute static routes into other routing protocols OSPF default after the cost , but this command to redistribute directly connected interface. invalid. ( 0xFFFF0000-0xFFFFFFFF ) is a reserved community value. In addition to these values, several well-known values ​​such as no-export , local-as, etc. are defined. For specific values, see RFC . In order to verify this rule, we first maintain the basic BGP configuration. Introduce 100.0 by using network on R1 Ip default-gateway 192.168.100.254 Interface fast0/0 In addition, if there are multiple links between two EBGPs and use their respective Loopback ports as the source , you should also pay attention to the configuration. Ebgp-multihop 2 (because loopback spans two routers, including this one ), and must also refer to static routing to the other's loopback interface. ) Vlan range and mapping In this experiment, we define AS345 as a federated AS , R3 , and R4 as member ASs , using 64512 as the AS number, R5 as a member AS , and 64513 as the AS number. The frame to which the Native VLAN belongs is not tagged when it passes the trunk . Y Response message and check !! Globally enable DHCP snooping Avoiding ARP and its vulnerabilities through specific mechanisms in IPv6 Failure case analysis R4#sh ip bgp ? Redistribute connected subnets redistribute rip metric 10 subnets network 192.168.23.0 0.0.0.255 area 0 , By the spanning tree protocol in a particular port logically Block , in order to achieve redundant physical environment, and the upper floor and preventing the loops Loopback Loopback interface Interface fa1/0 AS65102 as a transit region ( trasit AS ), the AS inside BCDE running the OSPF , such that AS within reachable; D and C did not run Neighbor 10.1.23.3 send-community neighbor 10.1.23.3 route-map test out 10.1.23.3 from 10.1.23.3 (3.3.3.3) Port-channel Ethernet Channel of interfaces UDLD The decision process of BGP is to use the local routing policy for the routes in ajd-RIBs-IN , and put the selected or modified routes into Loc-RIB and BGP only passes the route that it uses, that is, the route that it considers to be Best to the BGP peer. The default is 10 , this default value is generally sufficient. The smaller the total cost of the switch to reach the root switch path, the better, related to the interface bandwidth. 2 Ip route 0.0.0.0 0.0.0.0 null0 100 Unicast update Detailed command Mode 100$|400$ Affect routing decisions by modifying weight 10 Rule validation ( AS_SET type AS_PATH , i.e. {} in the AS number in AS_PATH when calculated as a hop) Send BPDU Do not send outside local AS (well-known community) 5 R2# sh ip ro 100.100.100.0 The front is to use static routing. If dynamic routing protocol is used, the situation is different. For example, IGRP or EIGRP , the network specified by the ip default-network command must be obtained through IGRP or EIGRP (declaration, learning or redistribution). ), the default route can be dynamically passed to other protocol routers. RIP-2 RIPv2 uses multicast update If deterministic-med is turned on, the information of the route prefix is regrouped by AS. Route metric is 0, traffic share count is 60 Router(config-router)# distance ospf external ad1 inter-area ad2 intra-area ad3 Configuration example 5 (in the single routing protocol environment - OSPF out direction distribution list) If the routes are from EBGP neighbors, it is preferred that the oldest EBGP neighbor came routing, reducing the impact of roll Used for unidirectional link detection, mainly for fiber links. Devices that need both ends of the link support UDLD Ip community-list standard del permit no-export route-map test permit 10 Tag 9, type extern 2, forward metric 64 Same speed and duplex If a DHCP relay is also deployed on the switch, the switch adds the relay address to the DHCP packet. Case PBR 88 Switchport access vlan 10 interface fast0/24 PC2 is a new host access, arranged 192.168.0.1 address, the address after the completion of the configuration, PC2 transmits to the network a Gratuitous ARP , to prevent someone within the network using the same IP address, the Gratuitous ARP is senderIP and target IP All are themselves, senderMAC is its own MAC . If R2 is added to the default route of R3 on the above basis, the data of the PC to the 10.1.13.0 network is still lost to R1 , which means that ip defaut-next-hop has higher priority than the default route. This comprehensive thinking question helps you sort through several solutions: Precautions: These policy-lists can be called in the route-map A frame whose type field is 0835 represents an RARP protocol frame. STP requires network devices to exchange messages to detect bridged loops. This message is called the bridge protocol data unit BPDU. The blocked port also receives BPDUs continuously to ensure that a new STP can still be calculated when the fault occurs . To understand the working process of STP ,ine - ccnp r&s v2 (2015), it is very important to understand the meaning of the fields in the BPDU , because these are the root of the work STP relies on.