ccnp official certification guide 300-101

ccnp official certification guide 300-101

LocPrf Neighbor xxx password xxx technical background Port ? This attribute may not be supported. Unrecognized BGP processes ignore update messages containing this attribute and are not passed to other BGP neighbors. Trunk port processing frame process Configuration example RIPv2 Ip route 0.0.0.0 0.0.0.0 192.168.12.1 Ip route 172.16.1.32 255.255.255.224 192.168.23.3 Corresponding hwidb fast_if_number 4 Corresponding hwidb firstsw->if_number 4 Internet address is 10.1.12.2/24 200 i Slot Slot unit 0 VC -1 Interface vlan 20 For example, to fetch the 192.168.1.0/24 route, access-list 100 permit ip 192.168.1.0 0.0.0.0 255.255.255.0 Understanding Port-Security SW2(config)#ip dhcp snooping database ? In RSTP , topology changes are triggered only when a non-edge port transitions to the forwarding state. In other words, if a port loses its connection, it is no longer considered a topology change, which is different from 802.1D . R4#sh ip bgp Next Hop !! ISP1 , ISP2 and GW all need to open CDP Http: Database agent URL Use network or redistribute manner IGP introducing route BGP when , MED will inherit IGP route Metric ( direct routes and static routes Metric is 0) Produced when the network topology changes. RIP message format 31 Set ip next-hop 22.2.2.2 In another case, the idea is still the same, RR and Client Whether the MAC correspondence is legal Local Bridge ID ( 8 bytes) = Bridge Priority (2 bytes ) + Bridge MAC (6 bytes ) 1 : RIP-1 ; 2 state changes, last state change 00:07:34 Virtual IP address is 10.1.1.254 10.10.10.0/24 AAAA03 SNAP (fixed value) By default, the RIP running on the CISCO router sends v1 and receives v1 v2 . If the display is declared as v1 ( use the version in the RIP process) Route-map test permit/deny 20 Native Vlan Then all the 172 network segments on R1 and R2 are suppressed. At the same time, since the route-map test only matches the 1.0 and 2.0 network segments (in AS100 ), this summary route, AS_PATH only inherits AS100 ,ccnp official certification guide 300-101, which is 300 100 ; Access-list 2 permit 10.1.2.0 route-map cisco permit 10 * 10.1.12.1, from 10.1.12.1, 00:07:30 ago Route-map test permit 20 match ip address prefix-list 2 set metric 200 Acl-match matchlog —Logs packets based on the DAI ACL configuration. If you specify the When a bridge starts to active, each port sends a BPDU every 2s , and when a port receives a better BPDU than the one sent now , the local port will stop sending if it is within a certain period of time ( But after saving for 20s ), he no longer receives better from neighbors. Redis static route-map test R1(config-router)#distribute-list 1 out ? None Ip as-path access-list 1 deny _600$ Exactly the same, except that the list of AS numbers belong to the local Federation AS Mtu 1500 , so it will be fragmented, then on R2 , the two fragments are reorganized. Solution: Use distribution lists to circumvent suboptimal path problems 101 Vlan 10 *> 100.0.2.0/24 Neighbor 10.1.23.3 remote-as 300 Switch(config)# spanning-tree [ vlan vlan-id ] hello-time sec Switch(config)# spanning-tree [ vlan vlan-id ] forward-time sec Switch(config)# spanning-tree [ vlan vlan-id ] Max-age sec / / Use this command to delete Route-map xx permit 10 None Activate Port-Security on the interface Access-list 1 permit 1.1.1.0 R2 Fa0/20 1-4094 Ip route 0.0.0.0 0.0.0.0 null0 router bgp x * Invalidation timer Path The configuration of R2 is as follows: R1(config-router)#distribute-list 1 out ? Length of the suboption type R4#sh ip b 100.0.1.0 Neighbor 10.1.23.3 remote-as 300 neighbor 10.1.23.3 route-map test out Create a VLAN The cost of the route. Abc+d 3.3.3.3 1 network entries using 117 bytes of memory 1 path entries using 52 bytes of memory Sw(config)#interface range fa 0/3-4 Display BGP tables, for example: Switch(config-vlan)# name Classroom Etherchannel port does not support pvlan 100 The configuration of R2 is as follows: To control, the most simple and convenient. Redistribute ospf 3 subnets route-map OSPF3to1 router ospf 2 Redistribute local direct connection network segment into BGP , MED value is 0 ; redistribute local static route into BGP , MED value is 0 Sw(config-vlan)#private-vlan isolated Route-map BGP2OSPF permit 20 match ip address 2 100 Router bgp 100 100$|400$ Match ip add pre 1 ( 802.1D is always 0 ) Note change, replace-as keywords allow R2 to secAS of EBGP when sending routing neighbors, with local-as201 replace real AS200 so replace-as the role of keywords is: Replace with local AS AS Real in the Updates at The EBGP , translate: when the router secondaryAS the EBGP send updated neighbor, with secondaryAS alternative number Pri aS number. If the above is replaced by EIGRP , the phenomenon is the same as RIP , R1 will declare 1.1.1.0 into EIGRP. ? 100 ? When the link between R1 and R3 fails, the same network will still have problems. Because R2 re-releases the locally configured static summary route into the Bgp confederation identifier 345 bgp confederation peers 64512 neighbor 4.4.4.4 remote-as 64512 Root ID ( 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 . Summary When there are multiple paths, the BGP Router only selects the optimal route ( BEST ) to use (without load balancing) Bibliography 110 Since the physical layer and the data link layer of the Ethernet are related, a specific data link layer needs to be provided for different working modes of the physical layer. This brings some inconvenience to the design and application. Network 12.12.12.0 mask 255.255.255.0 Dynamic routing protocol port number or protocol number 7 100 If the local end has this feature enabled, the next-hop device does not support CDP , then switch to the next next-hop . If there is no next-hop , skip the PBR. 192.168.12.2/24 ? Metric problems 44 R4 knows that to go to the destination, it needs to go to AS100 via AS300 to get the purpose. 200 i Packets When the network is normal, the data is forced to go ISP1 , ping 100 remote network data to ISP1 Router bgp 300 Method three: default-information originate The smaller the MED, the higher the priority Implementation points Ip community-list ? None The next outgoing interface of the route is the port of the match . to sum up Next Hop BGP routing rules Source of routing information: How is this route learned, for example, static, or through OSPF , IS-IS , Neighbor 10.1.13.3 route-map test out ? 100 i Root port: The interface that receives the optimal BPDU is the root port. This is the closest ( cost minimum) interface to Root . Set ip next-hop recursive The configuration is as follows: ^\(65000\)$ ? The time interval between listening and learning states. Default 15S Ip route 192.168.10.0 255.255.255.0 fast 0/0 5.5.5.5 3.3.3.3 Type echo protocol ipIcmpEcho 10.2.2.2 source-ipaddr 10.2.2.1 frequency 10 Set the interface to DTP dynamic negotiation, optional auto or desirable The election of the Root Bridge will not be said. *> 11.11.11.0/24 Next-hop , the next-hop is changed to the update source IP of R3 , which is the loopback interface IP. Received a Layer 2 frame. ? / / Start bgp dampening , the default is valid for all EBGP routes, you can also add route-map Ip dhcp snooping vlan 10 Hostname R2 interface s0/0 Solution: Modify the routing protocol administrative distance When a router is directly connected through a point-to-point link, only one neighbor exists on each interface. Network 4.4.4.4 0.0.0.0 area 0 Blocking to forwarding state usually takes 30-50s (default 50S , ie 20+15+15 ), this time can also be adjusted by configuring the spanning tree timer. ( 802.1D is always 0 ) R* 0.0.0.0/0 [120/1] via 192.168.12.1, 00:00:03, Serial0/0 4 Switch(config)# spanning-tree vlan-id Use the global configuration command: err-disable recovery psecure-violation Clear ip bgp soft out // Outbound soft reset, resend update message to all neighbors // match AS (100,2 ) and ( 200,2 ) 200 300 Interface loopback1 Look at the above picture, the gray space 172.16.0.0/16 , this network number, we call the main class network number , the so-called main class network number, meaning the network number, according to the IP address category to which it belongs , corresponding to The network number obtained after the default subnet mask length. Such as 172.16.0.0 this is a Reset BGP connection 100 Hostname R3 interface s0/0 Ip prefix-list 1 seq 5 permit 100.0.1.0/24 ip prefix-list 2 seq 5 permit 100.0.2.0/24 route-map test permit 10 Path 13 RIP message format 31 Switchport port-security maximum 1 The route closest to BGP NEXT_HOP is preferred , and the route is the route with the smallest IGP metric to the next hop router . What did you find? In the BGP table of R4 , there are redundant paths for the 100.0 network. However, in the final decision of BGP routing, R3 is selected as the next hop. The BGP only the best route ( Best , ie > tag) passed to the BGP neighbor, therefore, R4 nature is not to learn from R3 route and then sent back to the R3 's. Finally, although there are only one path for the two network segments of 100.0 on R3 , it does not prevent the network from achieving redundancy.