ccnp switch 300-115 in

ccnp switch 300-115 in

So how do you perform an accurate calculation of the summary route ? Let's look at an example: Multi-hop EBGP If R1 turns on auto-summary and network 1.1.1.0 mask 255.255.255.0 , it is still updated to R2 with details. Arp spoofing solution In the nogotiate permanent link aggregation mode, the neighbor must be manually configured as a trunk gate and no DTP frame is sent . Generally used when the peer device does not support DTP . Neighbor 10.1.12.2 send-community If BGP routes are passed from EBGP peers The next-hop attribute can be changed by next-hop-self Remote-ID type Regular expression example: Weight Port 5.5.5.5 UDP * 10.1.12.1, from 10.1.12.1, 00:07:30 ago Tool overview 62 ---------- // There are routes in the routing table of R3 : 1.1.1.0 , 2.2.2.0 , 192.168.12.0 You can not route the network , but the origin of the route, configure a summary static, and then network the summary route, this method is not recommended. The ip community-list is also like ACL . There are standard and extension points, 1-99 is the standard, and 100-199 is the extension. Extended community-list Example 2 of ip community-list (logical relationship): ! Access-list 1 permit any route-map PBR permit 10 match ip address 1 The Layer 2 switch searches for VLAN configuration information based on the destination MAC address and VLAN ID of the frame, and determines from which port the frame is sent out. The same prefix is ​​obtained through different protocols, first than AD , and later than metric ? Loopback Loopback interface VID Mode No synchronization no auto-summary In PVST+ , a VLAN has a spanning tree. On each switch, a unique identifier is required for each spanning tree, that is, the network. Ip dhcp pool BIND 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 ) Provides load balancing and redundancy Network Next Hop Metric LocPrf Weight Path Neighbor R2 unsuppress-map test Let the CISCO router ignore the AS-path attribute during its decision making process Display BGP tables, for example: to sum up RA(as200) RB(as100) RC(as100) Port role: Router bgp 100 Mode : 000a.8a07.8280 : 1 to 3 R8 to re-advertise 8.8.8.0 into the BGP , has spread to R10 , the R10 on the route AS_PATH is 98? , The network learns the route learned from the IGP routing protocol into BGP . The MED value inherits the metric in the IGP protocol. ? Violation Mode : Shutdown !! After the violation, the default is shutdown Aging Time : 0 mins Another recommended solution is to adjust the management distance of the routing protocol: * i100.0.1.0/24 Generally seen between switches or between switches and routers and servers It means for VLAN100 traffic, not to log the ARP ACL discarded packets match Neighbor 1.1.1.1 remote-as 123  32 bits If R1 is configured as follows: 10.1.34.3 from 10.1.34.3 (3.3.3.3) / / Use this command to delete Passive interface About the rate_in_pps parameter: RIP secondary address problem Metric 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 In this way, whether the method of re-publishing the static summary route or the method of distributing the list filtering route can ensure that the network is not interrupted in the event of a network failure, as follows: Use a hold-down timer to prevent routing loops The shorter the AS-Path, the higher the priority. In the above figure, the configuration revision number of server and client is the same, but the vlan information is different. At this time, an error will be reported, prompting md5 digest checksum mismatch Version Routing Feedback (feedback) is a re-release in the deployment of routing requires a great attention to the phenomenon. As shown above, R5 will VTP pruning Network xxx mask yyy route-map zzz Epoch 0 Switch(config)# vlan 20 When the number of prefixes received from the neighbor exceeds the maximum number 300 of 90% (default 75% ), generating a message log Preferably EBGP route Weight In a real network environment,ccnp switch 300-115 in, we may encounter a situation where there are two or more routing protocols in a network environment, for example: Match x4 set Y EtherChannel supports load balancing in the same port-channel link The route -map used by exist-map has at least the following two match statements: Isolated We restore the experimental environment to the basic configuration: BGP neighbor relationships are as follows Hardware-address hardware-address type If it is injected through network or re-release, the IGP next hop of the prefix will be the next-hop of BGP before injection. Status codes: s suppressed, d damped, h history, * valid, > best, i - internal, r RIB-failure, S Stale Origin codes: i - IGP, e - EGP, ? - incomplete Off: EtherChannel not configured on interface If it is unreachable, the suppression timer is started at the same time. If the timer expires, the same neighbor still advertises the ? Match ip address prefix-list 11 set as-path prepend 600 5 0 100 0 200 i Path We will find that when the topology changes, the TCN will be generated . However, in some cases, the transition flooding of the TCN may have an unnecessary impact on the network . The interface connected to the PC terminal device on the access layer switch is set to portfast network can be optimized to a certain extent, prevent the PC interface of the switch due to switch updown and excessive the TCN .