how hard is ccnp route

how hard is ccnp route

Ip community-list standard del permit no-export ip community-list standard del permit 100:11 B Path Sw(config-if)#switchport mode private-vlan host DUAL AS Advertised to update-groups: 1 Configure channel-group on the interface. Provides load balancing and redundancy 100 13 32 bits The weight of the BGP route generated by the local summary is also 32768. 11 Authentication Features Overview learner Access-list 1 permit 1.1.1.0 0.0.0.3 route-map test permit 10 Access-list 11 permit any route-map adv permit 10 match ip address 11 router bgp 12 A CFI of 0 indicates a classic format. Configuring a sample RIP environment 1082 !! Match, go this one IBGP horizontal segmentation It is recognized that the attributes must be followed, and the source of routing updates is clarified. another example Set ip next-hop 10.2.2.2 IP Port *Mar 1 00:11:47.887: ICMP: redirect rcvd from 192.168.123.1- for 2.2.2.2 use gw 192.168.123.2 If an interface is in the flooding state, it will bring a lot of upadate and witdhdrawn messages to the network . Therefore, for a flipped interface, no bgp fast-external-fallover is recommended . After the interface is shut down, the BGP session and neighbor relationship will remain until The KEEPALIVE message contains only 19 bytes of BGP headers, and does not contain any other data. Redistribute connected subnets redistribute rip metric 10 subnets After completing this configuration, we can show it: After the Uplinkfast feature is activated , the switch automatically adjusts some parameters: Ip arp inspection vlan {vlan_ID | vlan_range} 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 . s> 172.16.11.0/24 The maximum time allowed before a KEEPLIVE or update message must be received . If Holdtime is inconsistent at both ends , both parties accept a smaller time. R2(config)#router ospf 1 Protocol mechanism O 2.2.2.2 [110/65] via 10.1.12.2, 00:05:16, Serial0/0 / / Use the federal member AS number to establish BGP 10.1.13.1 4 3 Destination address: The address of the host or network. Received WAS, IT A SENDS that the LAN containing the BPDU DATE The up-to-Port Information Stored for that. the In the this Way, the inferior IS Discarded Information, and Superior Information The IS ON propagated Network. " For details on the BGP neighbor table field, see the show section of the BGP Configuration section of this document. MED attributes for routes published to the federation are retained throughout the federation Through MED affect route choice 18 Route-map OSPF3to2 permit 20 match tag 20 In R4 connected R2 interfaces capture found update package 11.11.11.0 attribute prefix is carried in the AS_PATH , content of AS 1 4.3.2 Message Type 35 The non- root bridge receives the TCN on its designated port FastEthernet1/0 Determine if the frame has a VLAN tag . Use 224.0.0.9 SW1 and SW2 are configured as VTP mode client ; SW3 is configured as VTP mode Server Each AS has an identification number ranging from 1 to 65535 , of which 64512 to 65535 are reserved for private use. Match ip address prefix-list 1 router bgp 1 Neighbor 4.4.4.4 remote-as 345 ? All clients in the route reflection cluster should establish IBGP connections with and only with all RRs in the cluster. In the federal scope, the member AS number is pushed into the AS_PATH , but not published outside the federation, and the AS_PATH of TYPE3 , 4 is used . LocPrf 0xFFFF VTP Operating Mode : Server Maximum VLANs supported locally 1005 *Mar 1 00:11:48.023: ICMP: echo reply rcvd, src 2.2.2.2, dst 192.168.123.3 3.3.3.3 The ETHERNET_SNAP frame can be used to transport multiple protocols. Therefore, SNAP can be seen as an extension that allows vendors to create their own Ethernet transport protocols. Network 192.168.20.0 0.0.0.255 area 1 Type of data. Switch(config-if)# switchport port-security aging type {absolute | inactivity} Therefore, the role of the no-prepend keyword is: Do not prepend local-as to updates from ebgp peers . If you advertise the route to the EBGP neighbor of the primary AS , the secondary AS number is not attached . Name server Trunking Version 8bit , V4 currently uses more versions If DHCP snooping is turned off or this is a DHCP- free network environment, such as a pure static IP address environment, use ARP R2(config-router)# distribute-list 1 out fa 1/0 At the time, it is already " 200 i ", so doing prepend can only be inserted in front of 200 i , please pay attention to the difference from the previous one. 4.4.4.4 About the recovery of err-disable after being punished : Using reflector Border Gateway Protocol (BGP) Connected Interface vlan 10 *> We restore the experimental environment to the basic configuration: BGP neighbor relationships are as follows Toxicity reversal VLAN abbreviation Set as-path set community R1(config-router)# network 12.12.12.0 mask 255.255.255.0 R1(config-router)# distribute-list prefix 11 out As a result, there is no problem with route delivery. LocPrf Whenever a route is reflected by the reflector, the cluster -ID of the reflector (the cluster) is added to the route's Cluster-list attribute. CASE1 : Sh ip bgp neighbors {address} received-routes ? RIP-1 compatibility RIPv2 sends updates in the form of broadcasts, enabling V1 to receive ? Router bgp 12 table-map PA Select the port for the Channel BGP routing table entry for 11.11.11.0/24, version 2 Switching, so we can only disable fast switching by : no ip route-cache , which in another sense is to turn on process switching. In the transport AS , establish IBGP full interconnection, that is, R3 and R4 , R4 and R5 , R3 and R5 are established. External route tag Knowledge review BGP table version is 1, local router ID is 4.4.4.4 [Experiment 6 ] There are subnet routes, the subnet route prefix length is different (matching and mismatching), and the matching route is taken. !! Take the default route Of course, it is ok to filter the prefix list in the in direction on R2 . In R1 to the 1.1.1.0 and 1.1.2.0 do a summary, as 1.0.0.0/8 , if coupled summary-only keyword, two details will be suppressed by inhibiting a bar if you want to cancel the details of a neighbor, Such as 1.1.1.0 , then Then observe the BGP table on R4 : When configuring the reflector, the client- to- client reflection is enabled by default, but if the client is fully interconnected, this command adds no to turn off the reflection between the clients. Often used with the portfast feature on the interface for connecting to the host Arp spoofing solution 3.5 RSTP (802.1W) About the configuration of PVLAN : doing what OSPF routes take effect, and only 1.1.1.0 routes survive. The source of continuous routing is direct routing, or RIP . Neighbor 10.1.23.3 remote-as 13 Command summary 81 ? Route tag Tag 73 LocPrf Verify again, instead of detailed routing, use a summary route of ip route 10.0.0.0 255.0.0.0 , the next hop is R3 , the effect is the same as above, also take R3 . Therefore, as long as it is not the default route, as long as there is such a matching route in the routing table, the route is taken preferentially, and the route-map is taken without the route . Associate route-map when route is re-published Path ? 32 bits | The above requirements can be achieved through the Port-Security function of the switch : Route matching tool Set default interface specifies how to send such a packet 10.1.13.1 Strange phenomenon: In the BGP table of R5 , there are only two routes advertised by R2 , and the 100.0 route from R3 is not passed to R5 via R4 . In other words, we expect that AS345 will have redundancy to 100.0 network. Remaining path (through R1 , In the above example, the phenomenon we mentioned, R4 will know the route from OSPF and RIP to 192.168.1.0/24 ,how hard is ccnp route, 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: Redistributing Routing Protocols 40 ! 100 i 10.1.12.2 Ip address 5.5.5.5 255.255.255.0 Although RIP is running between R1 and R2 , the routes of 1.1.1.0 and 2.2.2.0 are updated with each other , but since R1 is from RIP and his The new routing table is typically sent to neighboring routers on a regular basis, and the triggered update is sent immediately in response to changes in the routing table. So what are the solutions? FastEthernet0/0 Experimental verification 82 ---- -------------------- We found that although R4 learned these two prefixes through BGP , it is also valid (with * ), but it is not optimized (not best , no > mark). If it is not optimized, it will not be loaded into the routing table. Then why is this? Note that the next hop of the two routes is 10.1.13.1 , and it is worth noting that the directly connected network segment of 10.1.13.0 is not declared into OSPF by R3 . In other words, R4 goes to the next-hop of the two routes. Unreachable, the next hop is unreachable. Therefore, although the two BGP routes are in the BGP table, they are not best and cannot be loaded into the routing table.