ine ccnp tshoot workbook

ine ccnp tshoot workbook

In a real network environment, we may encounter a situation where there are two or more routing protocols in a network environment, for example: Route 1 : AS_PATH : 500 Border Gateway Protocol (BGP) Connected R4 knows that to go to the destination, it needs to go to AS100 via AS300 to get the purpose. R1(config)# ip prefix-list 11 seq 5 deny 11.11.11.0/24 R1(config)# ip prefix-list 11 seq 10 permit 0.0.0.0/0 le 32 R1(config)# router bgp 100 One of the ideal solutions is to transform the network topology: Switchport access vlan 10 interface fast0/24 Next is the re-release of EIGRP to OSPF : BGP routing table entry for 172.16.0.0/16, version 3 Instead of choosing R3 ? This is determined according to the routing principle of BGP (see the BGP document of Red Tea Three Cups Zhu SIR ). Here, the final impact of routing is such a rule "preferred routing from EBGP neighbors (relative to IBGP neighbors) "), R2 is the EBGP neighbor of R5 , so it is preferred. Enables debugging on the DHCP client First ensure that R1 , R3 to 10.1.1.0 are routed, and test on R2 : For example, change the COMM value of a route of AS12 to 10000 , and the RFC uses hexadecimal to indicate the COMMUNITY attribute, while CISCO PVST+ The comparison principle of OE2 is first compared to the external metric of OE2 . If they are equal, further comparison of the internal metric is the metric to the ASBR . Use a hold-down timer to prevent routing loops 0 ? Netflow switching Vtp pruning can only be turned on in server mode MAC address. Ge ge-value Configure the primary VLAN to associate the Layer 2 secondary VLAN to the primary VLAN. 802.1q In this way, whether the method of re-publishing the static summary route or the method of distributing the list filtering route can ensure that the network is not interrupted in the event of a network failure, as follows: Network If you try to activate 8021.X on a port-security interface, you will get an error and the 802.1X function will not open. The other side has received the Keepalive packet, the two sides agreed capability characteristics, started Update on : Disabled RSTP is able to quickly transition between edge ports and point2piont links. The link type of the RSTP is automatically obtained through the duplex state of the interface. If the interface is half-duplex, the link type is the shared port . If it is full-duplex, it is point2point . Verify set ip default next-hop CISCO routers have two ways to find the global lookup of routes: classful ( Classful ) lookup mode and classless ( Classless ) lookup mode. The configuration of R2 is as follows: Communicates with all other ports Interface vlan 100 Set the interface cost Not advertised to any peer 200 Do not advertise to any peer (well-known community) Do not export to next AS (well-known community) 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: The DHCP server got an illegal address and eventually the PC could not access the Internet. Two-way re-release on R2 . Under normal circumstances, R1 can learn 3.3.3.0 , and R3 can learn 1.1.1.0. In the nogotiate permanent link aggregation mode, the neighbor must be manually configured as a trunk gate and no DTP frame is sent . Generally used when the peer device does not support DTP . Can be detected when a violation time occurs, and can be punished C and D are not aware of 1.1.1.0 (they only run OSPF , not running BGP ), and thus become a routing black hole. Note that although the CD is not running Port Neighbor xxxx advertise-map xx exist-map xx Access permanent nontrunking mode and negotiate with the peer interface to make it a nontrunking link 0 00:04:30 Y The configuration of R3 is as follows: ? ? VLAN 15 bits with the current 10 th, then the support up to 2 of the 10 power = 1024 th VLAN To other neighbors ( Optional transitive ) R1 and R3 , R2, and R5 establish an EBGP neighbor relationship. Next Hop R2 's EIGRP routing process: O E2 1.1.1.0 [110/20] via 10.1.23.2, 00:06:40, Serial0/0 basic concept Fa0/22 desirable n-isl trunking 1 Mapping is only valid locally Match ip address prefix-list 11 set as-path prepend 600 We found a very strange phenomenon. R4 eventually went to 100.0 and both networks chose 3.3.3.3 as the next hop instead of metric . Why? Originally, the MED attribute, the BGP router only compares the MED values of the routes originating from the same host by default , and R1 and R2 belong to AS100 and AS200 respectively . Then, for R4 , the two paths of the 100.0.1.0 route are from different ASs , the default It bypasses the MED comparison,ine ccnp tshoot workbook, and finally, the rule that affects the routing is: " The RID of the BGP neighbor (the smaller the priority).