ccnp route review

ccnp route review

Please see the passhot of Black passhot" IPv6 Notes", visit passhot.com for the latest version. The command distribute-list out works only on the routes being redistributed by the Autonomous System Boundary Routers (ASBRs) into OSPF. It can be applied to external type 2 and external type 1 routes, but not to intra-area and interarea routes. WWW and SMTP belong to the Isalated VLAN , so they cannot access each other; WWW and SMTP servers can only communicate with the promiscuous port, that is, with the router. ? * i Route-map first acquaintance Show ip bgp on R3 Recognized as a self-determination attribute. LP is a local priority, only AS inside, in IBGP between peer transfer, and will not be passed to other EBGP neighbors Set the interface to nonegotiate and do not send DTP frames. If the configuration is non-negotiated, you must manually configure the interface mode as access. Completed in the logical interface Adj-RIBs-Out of We found that both O , O IA or with the FA 's OE2 routes are redistributed into BGP later, these BGP routes Next-hop are they in OSPF the IGP next hop. At the same time, the network segment where the OSPF direct connection port is activated locally will also be injected into BGP . After the injection, Next_Hop is the router (BGP update source IP) . If there are no dynamic and static routes on R2 , and the configuration is as follows: The "original Ethernet frame" is up to 1518 bytes, the IP MTU of 1500 , plus the source destination MAC address is 12 , the type field is 2 , CRC4 , plus 30 bytes of ISL encapsulation, which is 1548 bytes. Per packet load-sharing is disabled IP unicast RPF check is disabled Inbound access list is not set Outbound access list is not set 3.3.3.3 BGP routing table entry for 100.100.100.0/24, version 5 Paths: (2 available, best #1, table Default-IP-Routing-Table) Multipath: eBGP Used in route-map , when some of the matching entry, and using the set command, the route-map used in a neighbor (e.g., out time direction), then to update the route to a neighbor,ccnp route review, the BGP of MED properties will Inherit the metric value of these routes in the local IGP Repeat, you can configure multiple Application example Let the CISCO router ignore the AS-path attribute during its decision making process Applications Ip route 172.17.0.0 255.255.255.0 192.168.12.1 Community Aggregator ? 1 Switchport mode private-vlan promiscuous Switchport private-vlan mapping add 100 101 200 ? In CEF , there are two main types of load balancing, based on messages and based on purpose. Modify the TAG of the summary LSA of the ASBR notification ORIGINATOR_ID and CLUSTER_LIST are optional non-transfer attributes used by route reflectors to prevent loops. As shown above, the position of the line is 16+4=20 , so we get the summary address: 192.168.0.0/20 , which is the most accurate summary address. Route matching tool 70 EtherType When port-security mac-address sticky is activated on the interface , then: Sw1(config-if-range)#channel-group 1 mode desirable Sw1(config-if-range)#no shutdown This address of the neighbor must be IP reachable The RID is the largest IP address on the router and tends to be assigned to the loopback address. It can also be set manually by the bgp router-id command. If a path contains an RR attribute, the route generator ID ( originator ) will replace the RID in the optimal path selection process. Metric LocPrf Weight Not advertised to any peer ? R1 and R3 , R2, and R5 establish an EBGP neighbor relationship. IP Routing Overview Type echo protocol ipIcmpEcho 10.2.2.2 source-ipaddr 10.2.2.1 frequency 10 You can use route-map in the following BGP commands. 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 ------------------ 00:B0:64:04:09:99 Offset-list offset list 78 Note that PEs in an MPLS VPN environment do not have this limitation. 802.3 does not recognize the upper layer protocol and must be used with a dedicated LAN ( such as IPX) . BGP re-released to IGP Assigning community 100:11 to route 11.11.11.0/24 on R1 and passing it to R2 , then R1 is configured as follows: R3 and R4 , R4 and R5 establish IBGP neighbor relationships, and R3 R4 R5 uses LOOPBACK as the update source and refers to the neighbor . Configure no switchport ( routed port ) Layer 3 interface Lease expiration RIPng for IPv6 1 command) only sends and receives v1 messages, v2 only sends and receives v2 messages by default . ? Port-Security supports nonegotiating trunk interface Neighbor 10.1.12.2 capability orf prefix-list receive Ip community-list standard del permit no-export route-map test permit 10 DHCP clients require client identifiers. The unique identification of the client is specified in dotted port-security does not support etherchannel the port-channel interfaces Route-map cisco permit 20 match ip address 2 set metric 20 Number of messages waiting to be sent to the neighbor in the outQ queue FastEthernet0/0 Ip route 172.16.1.0 255.255.255.224 192.168.23.3 !! Press the longest match, go this one Router bgp 100 Match ip address 1 router bgp 100 TCP O 2.2.2.2 [110/65] via 10.1.12.2, 00:05:16, Serial0/0 Configuration Example SW1 still turns on dhcp snooping and inserts option82 This command can change the properties of the aggregation route (note, only for the summary route, not for the details). Next Hop 200 Packets with destination addresses that do not exist at the beginning of 192.168 are discarded directly. Normal traffic on other subnets of the 192.168 intranet will be forwarded according to the longest matching principle. Start a TCP connection. Prepare enough resources when BGP is enabled Redistribute rip metric 10 subnets distribute-list 1 out rip Metric Router eigrp 100 Elect a root port on each non-root bridge (Optional) Configuring the security address aging time switchport trunk encapsulation dot1q switchport mode trunk Ip rip trigger 31 *> 100.0.1.0/24 Port-Security is turned off by default R2 100 RIP V1 supports a maximum of 6 and defaults to 4 equivalent load balancing. And does not support verification. V2 supports verification. If it is RIP , the network specified by the ip default-network command does not need to be displayed to announce RIP , and once the default gateway is specified, RIP The third column is empty or i . If it is empty, the route is obtained from the EBGP neighbor. The i indicates that this is the route learned from IBGP . The last column indicates the origin of the BGP routing information. Configuration view and verification When the network topology changes, the switch that first recognizes the change will send the TCN ( TYPE field = 0x80 ) from the root port to the upper layer switch (in the direction of the ROOT ) until the root switch, except the upper switch. The upper layer switch sends the TC , and also returns one The GW configuration is as follows: Y Limit the maximum number of prefixes accepted from the neighbor. If this number is exceeded, the router will close the BGP connection with the neighbor. Apply clear ip bgp R2#show adjacency detail The BGP router appends its AS number to the AS_PATH only when the update message is sent to another AS ( EBGP peer ) . This sentence also implies another meaning, that is, if you want to modify the AS_PATH attribute, you must execute the policy on the AS border router, and the policy of modifying the AS_PATH for the IBGP neighbor is invalid. Match, and the result is that there is no match, it is directly discarded, regardless of whether there is a valid entry in the DHCP Snooping database . Experiment continued, after the above configuration, R4 has passed BGP learned from the R1 two of BGP routes. The protocol for RSTP BPDU is 2 and the version is 2 . Set the Route-map of the BGP peer application IN/OUT direction Weight <1-99> Community list number (standard) Ip community-list 30 permit 300:30 route-map PA permit 10 Paths: (1 available, best #1, table Default-IP-Routing-Table) Flag: 0x820 3.3.3.3 These two attributes are used to prevent ringing within the federation and member AS . About IP Routing Ip address 10.1.34.4 255.255.255.0 Then, the situation is different for RSTP . After receiving the sub-optimal BPDU , C will immediately send back its own BPDU , so that B can understand the topology. This mechanism is very similar to BackboneFast . Passive: passively wait for other side to ask Define the network segment associated with the address pool The following uses an example to illustrate the application of SSAP and DSAP . Assuming that Terminal System A and Terminal System B are to use a connection-oriented and reliable data transmission service, the following process occurs: The neighbor advertises the route. Store the result of the CRC cyclic redundancy check This address of the neighbor must be IP reachable Experimental verification If you try to activate port-security on an 802.1X interface, you will get an error and the port-security feature will not open. RSTP has made minor modifications to BPDUs only on an 802.1D basis : Neighbor 5.5.5.5 ebgp-multihop 3 Configure the Port-Security penalty mechanism Configuration example 1 ( -RIP in a single routing protocol environment ) IP routing troubleshootingShow ip dhcp database Displays recent activity on the DHCP database Maximum MAC Addresses : 1 !! The maximum number of secure addresses, the default is 1 We restore the experimental environment to the basic configuration: BGP neighbor relationships are as follows Redistribute ospf 1 route-map test 8 bits Assigning community 100:11 to route 11.11.11.0/24 on R1 and passing it to R2 , then R1 is configured as follows: FastEthernet1/0 Hash R4 on the show ip bgp 172.16.0.0 Preferred routes sent by EBGP neighbors (relative to IBGP neighbors), preferred federated EBGP routes in federated EBGP and IBGP R2(config)# access-list 1 deny 192.168.3.0 R2(config)# access-list 1 permit any R2(config)# router rip 10.1.23.2 B If the packets of the same data stream are sent in different paths, the IP packets may need to be re-queued when they reach the destination. This may reduce the forwarding performance of traffic such as VoIP , or if the packets arrive out of order, the quality of service will be degraded, packets may be discarded, and delay jitter will be added. Static routes Network Next Hop Metric LocPrf Weight Path Using route reflector 23 200 i 100 i Configure RIP unicast updates: Switch(config-if)# switchport mode host BGP Display all BGP routes advertised to a specific neighbor External route tag 10.10.10.0/24 In this way, TC messages are quickly flooded across the network. Instead of using 802.1D , pass the message to root and then root ipAddress 标准Add a standard community-list entry Bridge ID Then just republish this static summary route into OSPF . In this way , the routers in OSPF can reach through this summary route. Eliminate routing loops by horizontal splitting After the policy to take effect View R4 's BGP table: Address family Access-list 1 permit 192.168.1.0 route-map test permit 10 Basic configuration of Layer 3 switch BGP routing table entry for 100.100.100.0/24, version 5 Paths: (2 available, best #1, table Default-IP-Routing-Table) Multipath: eBGP Network 192.168.12.2 0.0.0.0 area 0 The default load balancing method is round-robin *Mar 16 17:09:21.858: DHCPD: inconsistent relay information. This route was therefore sent to R1 . C 1.1.1.0 is directly connected, Loopback0 2.0.0.0/32 is subnetted, 1 subnets Implementation of CEF The SYSID can also be used as an identifier for a VLAN or an MST instance. For example , the system ID extension of VLAN 100 is 100. The default keyword has a lower priority than the detail route. Ip dhcp pool vlan10 network 192.168.10.0 /24 Let us look at the above example. In a typical education park network, we often have more than two external network export routes, assuming one for telecommunications and one for education network. Then we generally add a default route to the egress router, pointing to the next hop address of the telecom, in order to allow intranet users to access Internet resources through telecommunication lines . However, if the telecommunications export fails? We can add a default route to the router.