ccnp switch command guide pdf

ccnp switch command guide pdf

Neighbor 10.1.12.2 remote-as 200 Experimental verification Paths: (2 available, best # 2, table Default-IP-Routing-Table) Flag: 0x820 Ip as-path access-list 1 permit _1$ After receiving the BPDU sent by SW3, SW2 stops sending its own BPDU. (empty), in other words, the MED will not be transmitted out of this AS R1 and R3 , R2, and R5 establish an EBGP neighbor relationship. Due to the existence of the principle of horizontal splitting, BGP requires that the IBGP be fully interconnected within the AS (here, the neighbor command specifies). (The root cause is in *Mar 1 00:11:47.951: ICMP: echo reply rcvd, src 2.2.2.2, dst 192.168.123.3 Note that although R4 passes the route 400 {100 , 200} ,ccnp switch command guide pdf, the AS in the braces is only calculated as an AS in the AS_PATH calculation. Therefore , the two EBGP routes received on R6 have the same AS_PATH length. Finally, R6 The route of the oldest EBGP neighbor will be preferred . Send Open package Locally find a route to the neighbor and try TCP three-way handshake. Waiting for completion, the authentication is completed during TCP setup. If the TCP connection is not up, enter the Active state and try to connect repeatedly. Le le-value Total number of bindings: 1 Off: EtherChannel not configured on interface Then IOS will automatically change the command to Set ip next-hop ip1 ip2 ...... 4. Proposal/Agreement Sequence Router ospf 1 Metric Interface fast0/1 Encapsulation Status This is a very typical case. In the above figure, the network environment is like this. Suppose we have two routers, R1 and R2 , connected to the server farm. The server farm uses two three-layer switches to hang the network server. We have planned two subnets for production of 10.1.1.0/24 and office 10.1.2.0/24 . R3 is the access router. R1 , R2 , and R3 run OSPF . Timer verification By default, only one BGP process can be started on a single router and can belong to only one AS . DUAL AS allows us to run a secondary AS under the primary AS without terminal BGP connections , thus providing a mechanism for network migration. For example, if you go to a destination and there may be multiple equal-cost paths, you may actually use one of them when forwarding data. Use this command to see which interface is actually used for traffic forwarding. 10.1.23.2 Deployment points 300 {100,200}, (aggregated by 300 3.3.3.3) RIP Version 2 Carrying Additional Information Solution 3 , so the above question is, R2 should not be to its EBGP announcement neighbor 1.1.1.0 , therefore CISCO support the use of command: Network ORIGINATOR_ID is a 32-bit value created by a route reflector . This value is the IBGP routerID of the route initiator in the local AS . Note that this initiator is not necessarily the initiator of this route (there is experimental verification below), if the initiator finds its RID In the received route ? Origin IGP, metric 0, localpref 100, valid, external, multipath The direct result of this command is that the metric of 192.168.12.0 in R3's original routing table is 30720 , but now it is 10000 , which becomes 40720 . We see that after the offset command is configured , what actually changes is the DLY that is updated to the neighbor . Because it is true that DLY is the best, the default Route-map test permit/deny 20 / / Use this command to delete The larger the Local_Pref , the higher the priority In the above output, the metric part of the red bold is the IGP metric that reaches the NEXT_HOP attribute address locally . We find that from R3 and R5 , the metric is 2 , then if we connect R4 to the interface of R3 , that is, F0/ 0 port OSPF Configure additional verification actions Similarly, if ip route 3.3.3.0 255.255.255.0 null0 is the same. Federal configuration and implementation The process learns the external route, so the update source here is R2 . Network Set metric 100 Field name Topology change mechanism (delivery) In addition, if the R1 update 1.0.0.0 to R2 , if R1passive out and R2 interconnect interface, invalid after the expiration, R2 on about the 1.0.0.0 route will Pdown , then R2 can still go to 1.0.0.0 , but will not Pass this route to other neighbors, instead sending non-stop messages. At this time, if the interface of R1 is passived , R2 will continue to receive the update, but it will not resume the route immediately, but will enter the holddown timer until the holddown timer expires before accepting the update of the route.