ccnp switch quick reference guide pdf

ccnp switch quick reference guide pdf

Ip route 0.0.0.0 0.0.0.0 192.168.23.3 Route reflection clusters include reflectors and their clients Access-list 1 deny 192.168.13.0 access-list 1 permit any In the above example, the phenomenon we mentioned, R4 will know the route from OSPF and RIP to 192.168.1.0/24 , and finally R4 will choose OSPF route. This is a phenomenon we don't want to see in this environment, because it creates a sub-optimal path. The AD values ​​for several common routing protocols are listed below: 3.3.3.3 Manually modified. Ip mtu refers to the maximum value of the ip message. DMZ-Link Bw 193 kbytes is an extended community attribute, so if you want to pass this value to the just IBGP neighbor in the AS , you need to add send-community and add the extended keyword. 100 i Define multiple serial numbers under route-map . The serial number has a priority order when performing matching actions. 10.1.34.0 is directly connected, Serial0/1 Paths: (2 available, best #2, table Default-IP-Routing-Table) Not advertised to any peer The VTP Server and clients synchronize the database with the highest revision number; BPDU packet Enhanced Interior Gateway Routing Protocol (EIGRP) Open Shortest Path First (OSPF) neighbor to mean), BGP The network command, only the local routing loaded into BGP one way process. Mode description Recognized as a self-determination attribute. LP is the local priority and is used for Update messages between internal peers ( IBGP ) , but not to other EBGP neighbors. The larger the LP value, the higher the priority. Preemption enabled, min delay 30 sec Active is local, weighting 100 AS Hops 1 V1 defaults to send v1 to receive v1, v2 May be provided for routing cost , cost-ID is equal to the time, preferably cost small. If the cost is equal, select the cost-ID is small. verification Therefore: the route is redistributed into OSPF , the automatically inherit these external routes BGP 's A_PATH property, note that only inherit AS_PATH R4 and R2 , we look R2 , R2 moment from R4 has learned this RIP routes, if it from the R3 also learn the route and of the route metric is smaller, then, R2 will preferably from R3 this Routes , so that R1 , R2 , and R3 form a routing loop. Before routing 0bits must 0.0.0.0 ago 0 Ge bit match, in fact, all the bits does not matter, but also for the mask, that did not write ge keyword is implicit so ge 0 Le 32 , that is, cover The code length is greater than 0 and less than or equal to 32 . So this prefix list is permit Static routes You can see these two routes by viewing the BGP table on R3 . BGP anti-ring is implemented through AS_PATH , and AS_PATH is only changed after the route leaves the AS . Therefore , IBGP does not have EBGP anti-ring capability in the AS . To prevent loops, BGP routers will not be from IBGP neighbors. The learned route is advertised to other IBGP neighbors. 10.1.13.3 Detailed rules 100 i Generally done at the AS boundary, tell yourself the local-pref value from within AS . BGP routing rules 1 345 ; R3 has a federated IBGP neighbor R4 . ? DoS attack. Then it is recommended to limit the ARP message threshold on the interface . The configuration of R1 is as follows: BGP PA can measure or traffic statistics on IP traffic sent by BGP peers. 4 The oldest EBGP neighbor means that it is probably the most stable BGP neighbor, so it is preferred here. Of course, this rule has poor controllability and is generally not used as a routing policy. The following happens and will skip this rule: When LINK1 DOWN is dropped, SW2 will not receive the BPDU from ROOT , so it considers its root and starts to SW3. (interface) ip load-sharing per-packet Access-list 11 permit any route-map adv permit 10 match ip address 11 router bgp 12 *> 100.0.1.0/24 Next Hop 3 Community Metric When an activation of the Port-Security on the interface, MAC number of addresses has reached the maximum safe number of address configuration, and has received a new frame, and the source of this data frame MAC is not in these security addresses, then start punishment COMMUNITY attribute is set . 4 th 8 value bit group, RFC1997 predetermined front 2B represents AS number, after 2B represents the basis for management purposes set identifier, the format of AA : NN , and CISCO default display format is NN : AA , may be used The global configuration command ip bgpcommunity new-format changes the CISCO default format to RFC format. The least significant bit of the LSB indicates the TC flag; the most significant bit of the MSB indicates the TCA flag. Configure the SVI interface corresponding to the VLAN . Atom character example: Although the network devices are in the same subnet, they belong to different pVlans , and communication between pVlans must be implemented through the default gateway. Router ospf 1 At this time, if another PC accesses the port, the port-security interface will receive a new data frame of the MAC address in the non-secure address entry , and the triggered violation action is given to the interface. Will be err-disable off. At the same time, a snmp trap message is generated . In addition, under the interface, the Security Violation Count will be incremented by 1. *>i100.0.2.0/24 Router ospf 1 The TCN BPDU contains three fields, which are identical to the first three fields except the type field of the configuration BPDU . !! Match, go this one ? Connectionless packet transfer service The maximum number of seconds allowed before the HOLDTime router must receive a keeplive or update message Routers can learn routing entries in a variety of ways: static manual configuration, various dynamic routing protocols, and more. When the router learns two routes to the same destination from two different ways, the router compares the AD values ​​of the two routes , that is, the management distance, preferably the route with a small AD value. If the AD values ​​are equal, for example, the same routing protocol, the metric value is further compared . Of course, this also involves the working mechanism problem of different routing protocols, which is specifically discussed for different routing protocols. As shown in the following figure,ccnp switch quick reference guide pdf, R3 and R1 run the RIP protocol, and R3 establishes adjacency relationship with R2 through OSPF . Therefore, R3 learns the route to the destination 1.1.1.0/24 from RIP and OSPF . The two routes use R1 and R2 as the next hop respectively. Then R3 finally chooses the OSPF route to be loaded into the routing table, which is to use R2 as the actual destination.