cisco ccnp 300-135

cisco ccnp 300-135

Principle of ARP protocol Configuration example 46 Match ip address 1 Requires trunk link support between switches 11 Match ip address matches the access list or prefix list * i Fa0/22 1-4094 2 Encapsulation protocol VLAN works on the second layer of the OSI reference model Match ip address Each RIP message contains routing entries, up to 25 , and more than one message is required. A advertises the detailed route to B , B advertises the detailed route to C and D , and C advertises the summary route. At this time, the summary route will be transmitted to B in addition to being notified to D , and this may cause problems. Therefore, you need to filter the summary route on the IP distribution-list x of neighbor B on C. Otherwise, a routing loop will occur. CISCO data forwarding mode 13 R3 Set metric 1111 Ip prefix-list 1 permit 11.11.11.0/24 route-map test per 10 ? 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. Management MAC table PS : In Ethernet, due to the conflict, two hosts on the shared medium send frames at the same time , which will cause conflicts. According to a specific algorithm, the minimum length of a frame in Ethernet is 64 bytes. At this time we look at the state of the trunk on SW1 : ^ Difficult case 60 You can see these two routes by viewing the BGP table on R3 . Option packet structure: Router ospf 1 Multi-vendor routing environment Only IBGP Peer transfer (unless otherwise made between strategy LP value AS in IBGP between neighbors transfer will not be lost), can not be EBGP Peer transfer between, if the EBGP Peer path between routes received property Carrying Local Portfast,uplinkfast, backbonefast Typical configuration example: Preferably EBGP route Router(config-router)# passive-interface default Router(config-router)# no passive-interface int- type int-num 200 i Designated port: Select a designated port on each segment , which will send the best BPDU on this segment . If the interface is configured as a host interface Route-map 55 [Synchronization concept] After a BGP router learns a route from an IBGP neighbor, it is not enabled (not optimized) unless it learns the same route from the IGP again . This is to prevent the routing black hole problem described above. Last update from 10.1.12.1 00:07:30 ago Routing Descriptor Blocks: Gratuitous ARP , the free ARP is a special ARP Request/response message, that is, the Sender IP is the same as the Target IP (usually used for IP collision detection). Use the match command to match a specific packet or route, and set to modify the packet or route related attributes. Match ip address prefix-list 1 set metric 200 Revision record Flooding the MAC table to the above port Unicast update (Note that in the actual environment, the situation may be quite different). CAM is the table that the switch checks when it is used for Layer 2 switching. After the interface is configured, the interface switches to the err-disable state immediately after receiving the BPDU . The configuration is as follows: Received a Layer 2 frame. Example 2 of ip community-list (logical relationship): MED , choose 3 Two-way re-release on R2 . Under normal circumstances, R1 can learn 3.3.3.0 , and R3 can learn 1.1.1.0. Port ? 1-4094 Aging Type : Absolute SecureStatic Address Aging : Disabled Use as-path access-list to match routes Ip route 1.1.1.0 255.255.255.0 serial 0/0 Set the timer of STP A macro command that specifies the interface mode as access and enables the portfast feature. Topology change mechanism Activate a particular VLAN of DAI 30.30.30.0/24 5.5.5.5 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 The above command only re-advertises OSPF NSSA routes into BGP. Track 1 rtr 1 reachability At this point , the route 1.1.1.0 is seen on R3 , which contains the next hop attribute, and the previous one. If a DHCP relay is also deployed on the switch, the switch adds the relay address to the DHCP packet. As Primary the AS , 201 of Secondary the AS , R2 can be maintained in the original R1 of BGP case of updating the routing and connection is not affected, Knowledge review Bgp default local-preference 500 // Modify the default LP value About recursion of routes 16 bits 2.2.2.2/32, version 55, epoch 0, per-destination sharing 0 packets, 0 bytes Fast switching is superior to process switching, it uses a route cache ( route cache ) for storing information about a stream of data (Flow) specific information , 100 A advertises the detailed route to B , B advertises the detailed route to C and D , and C advertises the summary route. At this time, the summary route will be transmitted to B in addition to being notified to D , and this may cause problems. Therefore, you need to filter the summary route on the IP distribution-list x of neighbor B on C. Otherwise, a routing loop will occur. *>i100.0.2.0/24 What package? Native Vlan Ip arp inspection limit {rate pps [burst interval seconds ] | none} Revoked route R1 and R3 , R2, and R5 establish an EBGP neighbor relationship. Run the switchport port-security mac-address command to configure a static security address entry. You can also configure DAI to discard the Ethernet frame source MAC and ARP body in the MAC illegal inconsistent ARP . This is followed by a further introduction. None The parameters and capability features are negotiated successfully. You start to send the Keepalive package and wait for the other party's // The offset value is increased by the value displayed in the normal route entry. It is added on the original basis instead of replacing the original hop count. *> 172.16.0.0 R4#sh ip bgp The weight of the BGP route generated by the local summary is also 32768. Configuration Example 4 (at a single routing protocols -OSPF ) Here are a few concepts to make clear: 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 . At this time, if another PC accesses the port, the port-security interface will receive a new data frame of the MAC address in the non-secure address entry , and the triggered violation action is given to the interface. Will be err-disable off. At the same time, a snmp trap message is generated . In addition, under the interface, the Security Violation Count will be incremented by 1. Neighbor 4.4.4.4 update-source Loopback0 neighbor 10.1.25.2 remote-as 200 And the preferred order is: i > e > ? All clients in the route reflection cluster should establish IBGP connections with and only with all RRs in the cluster. In Ethernet, different media access methods are provided for different duplex modes: The destination IP address of the route , which can be the address of the natural network segment or the subnet address or switchport trunk encapsulation dot1q switchport mode trunk 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,cisco ccnp 300-135, 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 Interface mode, configure the interface as DAI trusted , the default is untrusted Establishing IBGP full interconnection, the configuration is relatively simple, has been involved in the above experiments, let us look at how to achieve through the route reflector. The idea is very simple. We configure R4 as RR and R3 as the client of R4 . In this way, R4 acts as the RR and will reflect the route learned from Client R3 to R5 . It will also learn the route from IBGP neighbor R5 . Reflected to ClientR3 .