ccnp r&s vs ccna security

ccnp r&s vs ccna security

Private-vlan community Vlan 102 R2(config)#router ospf 1 Similarly, if ip route 3.3.3.0 255.255.255.0 null0 is the same. 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 peer is empty. 3.1 Overview 20 When the topology changes, the spanning tree protocol can detect these changes and automatically adjust the interface status in time to adapt to network topology changes and achieve link redundancy. Neighbor 5.5.5.5 remote-as 345 Show ip b rib-failure The smaller the MED, the higher the priority BGP routing table entry for 11.11.11.0/24, version 2 Clear the dynamically learned security address entries on the interface. 10.10.10.0/24 The configuration of R4 is as follows: Access-list 1 deny 192.168.13.0 access-list 1 permit any Route 2 : AS_PATH : 100 All devices complete the basic configuration and establish BGP neighbor relationships. The yellow area is the federated member AS . R5 release B segment RIP routing, R2 and R3 can learn, at the moment we are in R2 and R3 are on to OSPF to inject RIP routing, assuming that R2 injected first, then the B route will be R1 update to R3 ,ccnp r&s vs ccna security, R3 this When you learn B routing from both RIP and OSPF , then it will: Number_of_messages will also become 0 . ? 3 Neighbor 4.4.4.4 update-source loopback 0 // Specify the update source as loopback0 IP Routing Overview 5 Switch(config-if)# switchport port-security aging time ? 5.5.5.5 Router bgp 345 Note: If it is an EIGRP environment, you need to implement unicast update, then the route update interface can not be PASSIVE (this is different from RIP ), directly use the neighbor command to specify the neighbor. If the interface is PASSIVE , even if the neighbor is manually specified , the EIGRP neighbor relationship cannot be established normally . Ip default-network 192.168.1.0 R5 routing, naturally the last is the route from R5 , reflection to R3 is no problem. Match community 11 Ip dhcp pool BIND We found that both routes are best and are loaded into the routing table. Ip route 0.0.0.0 0.0.0.0 192.168.12.1 Neighbor 10.1.12.1 remote-as 100 Path In addition, if the command is configured when writing: Then IOS will automatically change the command to Set ip next-hop ip1 ip2 ...... Let's look at a simple case of a three-tier exchange deployment: 100 (2) By default, the routing entry of 1.0.0.0 updated by R1 is ignored. After configuring ip rip receive v 1 on S0, you can learn. 3.3.3.3 Policy-list feature [Note] If the interface is passive , but at the same time the network interface in the routing process, the interface will not attempt to send updates or establish neighbor relationships, but the network segment where it is located will still be declared into the routing process. Deployment points When ISP1 is down, and the GW does not detect it (that is , the interface of GW connected to ISP1 is not DOWN ), the traffic of PC access 100 is still thrown to ISP1 , which is disconnected. For 802.1D , when a port is elected as the designated interface, which from blocking to forwarding at least 30S of time. However, in RSTP , the proposal/Agreement mechanism enables the interface to complete a fast, reliable transition in seconds. So what are the solutions? Two-point two-way routes redistributed problems RIP database Example of multiplication characters: Ip address 10.1.34.3 255.255.255.0 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. The use of one-arm routing can solve the problem of data exchange between VLANs , but there are also various drawbacks, such as the interface of the router, the load is too large, and the traffic needs to enter and exit the interface or link twice, causing the load on the trunk link to be too heavy. And the scalability is particularly poor. Local network and re-routed routes, LP defaults to 100 , and can be transmitted to other IBGP neighbors within the AS . The LP is unchanged unless the policy is deployed during transmission. Both R1 and R2 inject 100.0.1.0 and 100.0.2.0 into BGP using network . Ok, then let's start the experiment below: No-advertise no-export Finally: R4#sh ip b Optional non-delivery, generally used between AS to affect routing. DoS attack. Then it is recommended to limit the ARP message threshold on the interface . Ip route 0.0.0.0 0.0.0.0 null0 router bgp x Fast forwarding Ip helper-address 192.168.100.1 Run RIPv2 , the default R1 update 1.0.0.0/8 is summarized to R2 , and the automatic summary is closed on R1 , then R2 learns to 1.1.1.0/24 , and since it still starts automatic summarization, the update to R3 is 1.0.0.0. /8 . This time if R2 on ip route 1.1.1.0 255.255.255.0 null0 , then R2 is routed on the table 1.1.1.0 becomes static static routing, and the R2 is no longer to R3 updated RIP 's ipAddress DMZ-Link Bw 193 kbytes Router ospf 100 --------------- 192.168.10.1 Port ID ( 2 bytes) = Port Priority (1 byte ) + Port ID (1 byte ) Baby giant frame is larger than the standard MTU 1500 bytes, but less than 2000 bytes Used to limit the time that the route staying in the routing table has not been updated. Slot Slot unit 0 VC -1 Use a static route to the next hop Acl-match none —Does not log packets that match ACLs. PAgP is a Cisco propretary protocol LACP is IEEE 802.3ad standard Exact match Path Set ip next-hop 10.1.1.2 10.2.2.2 interface fast 1/0 Set as-path set community Based on CEF Dhcp-bindings none —Does not log packets that match DHCP bindings. Note that the above two configurations are invalid for manually configuring the secure address of switchport port-security mac-address 00b0.9999.9999 . That is, the static security address entry configured by the above method never times out. Rl , R2 , R3 using LOOPBACK neighbor relationship with the address of 1.1.1.1 , 2.2.2.2 , 3.3.3.3 , running OSPF such The certificate contains the password information when it is verified using plain text. Rule example Marker : for detecting BGP loss of synchronization between peers, the message authentication, and in the case of supporting an authentication function if the message type is open or open message does not contain authentication message flag field is set to all 1 , For example, R1 redistributed into direct on the OSPF , with out distribution list can be filtered out direction 1.1.1.0 this external routes. But R1 redistributed incoming routing, if R2 with the out distribution lists direction tried to block R3 accepted routes or LSA , you can not, because this is not a local external routes originating. The IP configuration is as above. The R2 interface is configured with two IP addresses, and both have announced that the entire network runs RIP . Knowledge review Convergence comparison between 802.1D and RSTP Write multiple commums in the same line, such as ip community-list 1 permit no-export 12:1111 does not take effect, can not delete these two values Sw1(config-if)#ip address 172.16.10.1 255.255.255.0 Sw1(config-if)#no shu Toxicity reversal After receiving the BPDU packet, the interface will immediately switch to the err-disable state. Example 1 : No-advertise no-export 200 i AS_CONFED_SEQUENCE and AS_CONFED_SET Arp replies sent: 3 Forwarder 2 !! GW has no other configuration about routing switchport trunk encapsulation dot1q switchport mode trunk Modify the TAG of all external LSAs generated by the ASBR . Cc01.043c.0000 (10.1.1.252) Neighbor 4.4.4.4 remote-as 345 It is worth noting that we can manually modify the management distance of the routing protocol in the specific protocol process on R4 , so as to affect the routing of the router itself. For example, on R4 , we will default the administrative distance of OSPF to external routes. 110 , modified to 130 , greater than the RIP management distance of 120 , so that R4 in this environment, for 192.168.1.0 will optimize the RIP route, you can avoid the problem of sub-optimal path and routing feedback .