ccnp 642-813 vs 300-115

ccnp 642-813 vs 300-115

Cc01.043c.0000 (10.1.1.252) 32 bits CODE : 82 The composition of regular expressions Configure ARP packet rate limit abbreviation If you turn on always-compare-med In this way, the summary route inherits the detailed AS_PATH attribute, so atomic_aggregate is redundant. Therefore, in the above case, the generated summary route does not carry atomic_aggregate . Let's see: PVLAN considerations Native vlan Set community no-advertise route-map test permit 20 The above command only re-advertises OSPF internal routes and E1 routes into BGP. The non- root bridge receives the TCN on its designated port By default, only O and O IA routes in OSPF are redistributed into BGP. 2 byte Also, when R2 hangs, the entry of 172.16.2.0/24 is invalid, and the data destined for the 2.0 subnet is matching 172.16.0.0/16. No synchronization Reset BGP connection Displays all BGP routes received from the specified neighbor (original route before the local inbound policy is executed) Show tcp bri Message life Fa0/20 We can affect the routing by setting the LP value. For example, the same implementation allows R4 to access 100.0.1.0 and go to R3 , accessing 100.0.2.0. Switch(config)# interface fast0/15 1 : Request message, requesting all or part of the routing information from the neighbor; Priority 120 (configured) RIP defines two types of request messages and response messages. When a BGP router sends a route update to its EBGP neighbor, it cannot carry the LP attribute. The LP value of the EBGP route received by the other party is null (even the LP field is there), but it will assign a default to this route locally. Value, that is Origin IGP, metric 0, localpref 100,ccnp 642-813 vs 300-115, valid, internal, best Here are a few concepts to make clear: Another way is to use ARP ACL : I can't ping because I found a subnet route after looking up the table at 172.16.1.1 . Therefore, the search is limited to the subnet route, and then the route is found to be mismatched. Therefore, the packet is discarded directly without going through the default route. . Spanning Tree Protocol VTP version running VTP Domain Name VTP Pruning Mode VTP Traps Generation Redistribute connected route-map test Must be zero So in fact, it is very simple, as long as the prefix and mask part of the route, respectively, use the source and destination parts of the ACL to match. Destination address: The address of the host or network. Do not send outside local AS (well-known community) A BGP neighbor has an impact only on the router. It can be understood as a weight value. The larger the priority, the higher. The value is in the range 0-65535 . Then, first R2's own routing table will change, 3.0 routing is filtered out, and R3 is the downstream RIP router, 3.0 can not learn. Internal 0 packets, 0 bytes So to rule 12 : if multiple path originating router IDs or router IDs are the same, then the shortest path of the Cluster-List is preferred . Path ^10[^0-6]$ 10.1.25.2 Dhcp-bindings all —Logs all packets that match DHCP bindings. R1(config-router)#distribute-list 1 in ? // All interfaces By default, no rate limit is configured. State is Listen RIPv2 supports authentication by changing the field in the RIP message that should normally be the first route entry . In the single update message with authentication , the maximum number of route entries that can be carried is reduced to 24 . Origin IGP, metric 0, localpref 100, valid, external, atomic-aggregate , best Detailed rules The type parameter in the above command is used to indicate the hardware type of this hardware address. If type is 1 , the type is ethernet , if type Bgp dampening Ip route 0.0.0.0 0.0.0.0 192.168.23.3 Access-list 1 permit any route-map PBR permit 10 match ip address 1 Each message contains a BGP message header. The header of the BGP message is as follows: If both neighbor 1.1.1.1 weight and neighbor 1.1.1.1 filter-list 1 weight xxx are used , the latter is preferred Open loopback on R2 , IP is 172.16.10.0/24 , 172.16.11.0/24 None 10.1.13.3 The keyword should be added, otherwise the main class route will only be re-published. 9. Configure the switch to verify that the source MAC address in a DHCP packet received on untrusted ports matches the client hardware address in the packet. The default is to verify that the source MAC address matches the client hardware address in the packet. Passive-interface configuration 51 Must be a zero field. Configuring the sample EIGRP environment RIP Version 2 Carrying Additional Information Http: Database agent URL Private-vlan primary After an ARP ACL , if ARP packets are denyed by the ARP ACL , these packets are directly discarded, even in DHCP snooping. So in R1 on can learn 3.3.3.0 route, R1 routing table is as follows: The configuration of R2 is as follows: No auto-summary The configuration of R3 is as follows: Paths: (2 available, best #2, table Default-IP-Routing-Table) Not advertised to any peer Preferred to the nearest route to BGP NEXT_HOP 21 Ip helper-address 192.168.100.1 Ip sla monitor 2 0 packets, 0 bytes switched through the prefix tmstats: external 0 packets, 0 bytes The configuration is as follows: Preemption enabled, min delay 30 sec Active is local, weighting 100 No shutdown exit Next Hop OSPF can let R3 learn 1.0/24 and 2.0/24 routes. An important improvement in RSTP is the rapid transition of ports. The traditional STP algorithm needs to go through several timers before transitioning an interface to the forwarding state. In order to get a fast convergence of the network, we may adjust the timer, but this method may affect the stability of the network. d routed ( dampening ) route, the route is punished, although the route may be normal at present, but will not be notified before the end of the penalty period You can use ^ at the beginning of a range to exclude all characters in the range, or you can use an underscore _ to specify an interval. Router ospf 1  open *>i100.0.1.0/24 32 bits VLSM support Also a route prefix may carry multiple community to form a list, if you want the original route for a particular community to add a foundation community , then the route-map in the set community , the increase in additive keywords. Fa0/22 1-4094 5.5.5.5 Router(config-router)# distance AD ip-src wildmask acls Report routing information. Vlan 10 Ip community-list standard del permit no-export ip community-list standard del permit 100:11 Route-map test permit 20 match ip address prefix-list 2 set metric 100 These two attributes are used to prevent ringing within the federation and member AS . The DA 40bit multicast address is used to indicate that this FRAME is an ISL . On R2 and R3 , there are two OSPF processes. If shown, one is OSPF1 and the other is OSPF2 . Note that this dual process is mainly implemented on the two ASBRs R2 and R3 . ? Match ip address prefix-list 1 set weight 100 AD value and back door DoS attack. Then it is recommended to limit the ARP message threshold on the interface . Neighbor R3 filter-list 2 weight 5000 Promiscuous port capable pVLAN communicate with any device, regardless of the other master is in the VLAN , or secondary VLAN. Failure case analysis 1,10,20,30 !! In the case of turning off VTP prunnig , trunk defaults to traffic for all VLANs , which is in SW2 Method three: default-information originate C 1.1.1.0 is directly connected, Loopback0 2.0.0.0/32 is subnetted, 1 subnets If there is no tag , mark the PVID of the Access port and proceed to the next step. Ip route 0.0.0.0 0.0.0.0 null0 To this end, some organizations and manufacturers propose to layer the data link layer, which is divided into logical link control sub-layer ( LLC ) and media access control sub-layer ( MAC ). Such different physical layers correspond to different MAC sublayers, and the LLC sublayer can be completely independent. As shown in Figure 1-4 . ? Another way is to use ARP ACL : Route 1 : AS_PATH : 500 *time* Nov 05 2011 07:52 PM Summary 29 Metric Passive-interface 50 1.0.0.0/24 is subnetted, 1 subnets Metric Complete the basic configuration Basic VLAN concept State is Listen R3 13 In the BGP table, only one route is preferred, which should be R3 (because R3 's RouterID3.3.3.3 is less than R5 's 5.5.5.5 ) Metric Combine object tracking to detect the reachability of a remote device (or IP ) Neighbor 5.5.5.5 weight 100 Ip prefix-list ABC seq 5 permit 172.0.0.0/8 le 24 BGP The route works, but it is basically not used now, because the uncertainty is too strong) Weight You can use ^ at the beginning of a range to exclude all characters in the range, or you can use an underscore _ to specify an interval. Except none Unicast update Experimental phenomena: Y Route-map test permit 20 Path 100 Network Next Hop Metric LocPrf Weight Path Path The range of prefixes to match, ranging from length to le-value 3.3.3.3 100 MD5 digest : 0x49 0x3C 0x1F 0x79 0x15 0x00 0xC7 0xAE 0x0E 0xDC 0xDD 0xEF 0x93 0xA5 0xB6 0x26 Network 100.0.2.0 mask 255.255.255.0 Heavy FAQ published Then in the BGP process, network 0.0.0.0 can inject this default route into the BGP process . The default route introduced in BGP by this method will be delivered to all BGP neighbors. R3 announces 192.168.1.0 , 2.0 , and sets the community attribute of 1.0 to no-adv. Route-map can be used in different commands for specific purposes Network 100.0.1.0 mask 255.255.255.0 Neighbor 3.3.3.3 update-source Loopback0 neighbor 3.3.3.3 next-hop-self After the bgp bestpath compare-routerid command is configured , the principle is skipped and the route with the smallest RID is selected as the optimal. Exchange network security !! ISP1 , ISP2 and GW all need to open CDP 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 . Here, because there is an OSPF interval , and OSPF does not know BGP , the BGP attributes will be lost during the re-release process . Default-metric x !! Globally enable DHCP snooping Data ( DATA ) A default route will be published into the RIP and passed to other routers. For example, R1 , R2 , and R3 run RIP and open loopback on R1 . When a router receives an update from the neighbor router indicating that the previously reachable network is now unreachable, or has a route with a larger hop count, the router marks the route as unreachable and starts a suppression timer if If the router receives a newer update of the route before the timer expires, or has a better metric than the previous record, the router identifies that the route is reachable and deletes the timer.