ccnp switch chapter 10

ccnp switch chapter 10

Passive-interface configuration 51 Both R1 and R2 inject 100.0.1.0 and 100.0.2.0 into BGP using network . Ip arp inspection trust One thing to note here is that ip bgp-community new-format is used to convert the display format of community in CISCO IOS . When using regular expressions in the extended community-list list, the filtering results will vary depending on the format choice. Limit of inhibition: 2000 Len : Number of bytes of Sub-option Value , excluding two bytes of SubOpt and Len fields If DHCP snooping is turned off or this is a DHCP- free network environment, such as a pure static IP address environment, use ARP Origin codes: i - IGP, e - EGP, ? - incomplete Port Security : Enabled Switch(config)# interface fast0/15 Aggregate-address summary address as-set advertise-map VTP operation Range character *Mar 16 17:09:21.858: DHCPD: relay information option exists, but giaddr is zero. Community 10.1.13.1 command It is usually a direct connection because it will look for direct routes. EBGP default TTL is 1 Minimum path cost to the root bridge The configuration of R2 is as follows: EGP e was re-released from an early agreement such as EGP Dual two-way point of the route re-release After the Uplinkfast feature is activated , the switch automatically adjusts some parameters: 200 i ? Incomplete View and verify: Origin IGP, metric 0, localpref 100, valid, external, multipath, best Route 1 : AS_PATH : 500 Add configuration on SW2 : (global configuration mode) ip dhcp relay information trust-all EBGP neighbor As a result of the experiment, the PC could not get the address. ? CASE4 : Apply the configured ARP ACL to the DAI. ? R4 Neighbor IBGP_peers send-community The IGP Origin, Metric 0, localpref to 100, Valid, Internal, Best Originator: 1.1.1.1, the Cluster List: 2.2.2.2 The Native VLAN must match at both ends of the trunk . Otherwise,ccnp switch chapter 10, VLAN traffic will appear. ? Ip detects whether the IP address in the ARP body is invalid or unexpected, such as 0.0.0.0 , 255.255.255.255 , and multicast IP address, which are considered invalid IP . SenderIP verifies whether the message is an ARP request or response . And targetIP only if the message is the ARP response will be verified when Network 5.5.5.5 0.0.0.0 area 0 The configuration commands are as follows: 200 i The TCP connection was not successfully established and the TCP connection was tried repeatedly . Network 10.1.25.0 0.0.0.255 area 0 Set comm-list del delete route-map test permit 20 However, we found that R4 did not pass these two routes to R5 , which is because of the effect of IBGP 's horizontal splitting principle. According to the IBGP split horizon principle, a BGP router, if it learns BGP routes from its IBGP neighbors , will not be able to pass these BGP routes to other IBGP neighbors. The reason for setting this rule is that BGP anti-ring needs to resort to ID . Neighbor 3.3.3.3 peer-group IBGP_peers neighbor 4.4.4.4 peer-group IBGP_peers Route-map test permit 10 After 10.30.0 is passed to R3 , since the RIP updated subnet and the R3 interface subnet belong to the same main class network, R3 receives the update, and uses the interface mask as the mask of the RIP route, so the R3 routing table The route loaded in is: 10.1.20.0/24 200 201 300 Match ip add pre 1 *Mar 1 00:11:48.043: ICMP: echo reply rcvd, src 2.2.2.2, dst 192.168.123.3 Promiscuous The AVG is responsible for responding to the ARP request of the PC to the gateway , while the AVG is responsible for the allocation of the virtual MAC . AVG can be flexible depending on the load balancing mode PC 's ARP request response. If the route is learned from other neighbors, the default value (locally the route) is 0. Shows all routes received from the specified neighbor (a subset of the previous command, shown here is the route remaining after the inbound policy is executed) Major Points Path If R1 turns on auto-summary and network 1.0.0.0 , R2 can learn summary route 1.0.0.0/8 Advanced Features 100 Input conditions: length < ge-value < le-value <= 32 Manually modify the hop count of RIP . First configure matching routes For more detailed BGP state machine and neighbor relationship establishment process, please see the note document: " BGP State Machine and Neighbor Relationship Establishment Process" R1(config)# access-list 1 deny 11.11.11.0 R1(config)# access-list 1 permit any R1(config)# route-map rp permit 10 R1(config-route-map) match ip address 1 R1(config )# router bgp 100 ? Access-list 1 permit any route-map PBR permit 10 match ip address 1 Network 10.1.34.0 0.0.0.255 area 0 Based on agreement 10.1.12.1 from 10.1.12.1 (1.1.1.1) Clear the dynamically learned security address entries on the interface. The default priority is 128 , the range is 0-255 , the smaller the better Start a TC while timer for the root port and all non-edge designated ports . The timer value is equal to 2 times the hello-time timer. Input conditions: length < ge-value < le-value <= 32 By default, BGP does not allow static default routes to be injected when static is re-released ; unless it is in the BGP process at the same time default-information originate From this experimental analysis, the automatic aggregation of BGP is obtained , and the main class network boundary is not required, which is different from the IGP . Path Dot1q Failure case analysis Atomic_Aggregate and aggregator The boundary will change, so if you make an AS_PATH modification policy for IBGP neighbors , it will be nonsense. What happens to the two-way re-release of RIP to OSPF on R3 ? We assume that the configuration completed on R3 , the route 192.168.1.0 will be injected into OSPF by R3 , and will be updated to R1 , and then updated by R2 to R4 . At this moment, R4 learns this from both OSPF and RIP . Routing, what would it do? Of course, OSPF is preferred because AD is small, so in its routing table, the route about 192.168.1.