ccnp tshoot infrastructure services

ccnp tshoot infrastructure services

Match ip address 1 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. Re-routing interface connecting the local release, static routing weight is 32768 Remarks BGP based policy accounting on input is disabled BGP based policy accounting on output is disabled Hardware idb is FastEthernet0/0 RIPng for IPv6 Canonical Format Indicator , which is 1 bit long, indicates whether the MAC address is a classic format. We restore the experimental environment to the basic configuration: BGP neighbor relationships are as follows On the debug information we found: BVI Bridge-Group Virtual Interface 16 bits Neighbor 5.5.5.5 update-source Loopback0 Preferably the BGP NEXT_HOP nearest route After the completion, the two PCs can communicate with each other. Use strategy in R3 Connect Modify AS_PATH with route-map SW3 is small), so the interface connected to SW2 on SW4 wins and becomes RP . Distribute-list 1 in Configuration example At the same time, if 172.16.1.0 and 172.16.2.0 are all DOWNed at this time , the summary route also disappears. Neighbor 10.1.23.3 local-as 201 no-prepend CISCO data forwarding mode 13 Use as-path access-list to match routes 0 ? At this time, on R4 , only 1.1.1.0/24 and 192.168.13.0/24 can be learned. 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. Of course, this time 1.1.1.0 is unable to access 3.3.3.0 , because R3 does not have a route in the RIP routing domain (that is, there is a problem with the backhaul routing, data communication must always consider the round-trip path, remember), so if To achieve network-wide interworking, you need to be on R2 : Port-Security configuration steps The Protected port feature cannot be configured across switches: After completing the configuration, R2 show ip route R3 , R4 running the OSPF , the R3 on each can learn from the R1 and R2 of looback Route . 3 : the AS_PATH : 500 the MED : 150 External RouterID : 172.16.13.1 SW1#sh int trunk * i Set comm-list del delete route-map test permit 20 Catos port switch ID in the default priority 32 (priority . 6 th 'bit ) , the IOS switch default 128 (priority field . 8 bits) Experimental phenomena: Type ( Type ) Experimental example: Calling in the distribution list When a router connects through a multi-access medium such as Ethernet, a dynamic mechanism is needed to discover each other, such as ARP . ARP can map Layer 2 addresses to IP . If it is a frame relay multipoint link, the adjacency relationship can be learned by using an address resolution protocol, a mapping table, and the like. The comparison principle mainly refers to the local use of different methods such as network or redistribute when entering an IGP route into the BGP table. Next hop 10.1.12.2, FastEthernet0/0 valid adjacency 100 Clear ip bgp * Weight Revision statement BGP must be identifiable, update messages can include Interface vlan 100 Next hop address: The IP address of the interface of the neighboring router that needs to pass to reach the destination . [Experiment 1 ] The following are several situations. Configuration command Ip arp inspection validate { [dst-mac] [ip] [src-mac] } After the basic BGP configuration is complete , R1 establishes an EBGP neighbor relationship with R3 , R2, and R5 . R3 establishes an IBGP neighbor relationship with R4 , R4, and R5 (using the LOOPBACK interface as the update source). ? After the route-map is called, the matching action will be executed from the smallest sequence number. If the conditions in the sequence number are matched, the set command is executed . If the conditions do not match, the switch to the next sequence number is continued. Match the action. There is no match to a or c or t the end of the content R2#sh ip b 100.100.100.0 Field name Vlans allowed on trunk R2#sh cef interface s0/0 policy-statistics input Serial0/0 is up (if_number 4) The rules for BGP next-hop are as follows: R3-R4 ; R4-R5 ; R3-R5 maintains IBGP neighbor relationships and uses their respective LOOPBACK ports as update sources and establishes Configuring static routes Route-map Overview 55 Note that, EIGRP the metric is a mixed type, metric. 1 100000 100 255 1500 Parameters specified here, from left to right is the bandwidth, delay, load, reliability, the MTU . It can be flexibly set according to actual needs. After the above configuration is completed, R2 will be in the routing table. 90 Update-source Both of the above commands can be used to adjust the management distance of the routing protocol. The first command, distance ad ip-src , can adjust the management distance for a specific routing update source and a specific routing prefix. For example, I will use an OSPF. Some routes sent to me by the neighbor, the AD value is adjusted to 130 . The optional parameter length is used to indicate the length of the optional parameter field 100 i 8.3.4 Questions 104 Half-duplex and full-duplex are the concepts of the physical layer, and the different access modes for the duplex mode of the physical layer are the concept of the data link layer, thus forming an important feature of Ethernet: the data link layer and The physical layer is relevant. This address of the neighbor must be IP reachable Using ICMP protocol to detect 10.1.1.2 reachability (source address 10.1.1.1 to ping10.1.1.2 ) Track Object 's ID is 1 , associated to ip sla monitor 1 PVLAN considerations Preemption enabled, min delay 30 sec The Layer 2 interface contains access mode and trunk mode that we are very familiar with . All physical interfaces of the switch are Layer 2 interfaces by default, which is switchport . R4#sh ip b It takes effect on routes re-advertised from other dynamic routing domains. It does not take effect on direct routes (still 0 ) Recognized as a self-determination attribute. LP is a local priority, only AS inside,ccnp tshoot infrastructure services, in IBGP between peer transfer, and will not be passed to other EBGP neighbors / / Use this command to delete 3.3.3.3 Port number 179 LocPrf ^\(65000\)$ Advertise-map Ip as-path access-list 1 permit .* router bgp 300 Redistribute rip metric 10 subnets distribute-list 1 out rip On the untrust interface, create a security entry by manually configuring ARP ACLs on B. Of course, you can isolate the two switches in three layers, for example, add a router. Example 3 : Unicast update Metric Ip dhcp relay information trust-all No ip routing Both SW1 and SW2 can learn, and three-year-olds can do it. BGP table version is 1, local router ID is 4.4.4.4 1 i Two-way re-release on R2 . Under normal circumstances, R1 can learn 3.3.3.0 , and R3 can learn 1.1.1.0. We restore the experimental environment to the basic configuration: BGP neighbor relationships are as follows Network Via 10.1.13.3, FastEthernet1/0, 0 dependencies INDEX This port is the peer switch source port so the ISL frame is up to 1548bytes ( 1518+26+4 ) Use 224.0.0.9 Since the AS_PATH attribute does not change within the AS (only when the route leaves the AS ), the AS inner loop has a horizontal splitting mechanism, and the route reflector actually relaxes the horizontal splitting principle. This will bring some hidden dangers to the loop. Therefore, the route reflector needs to use the following two attributes to prevent loops: 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 . Next turn on DAI on SW1 : 100 ? Roo also received the request, and the request it received from the network segment 172.16.20.0 , and the table found that the network that the route to the host Milne is located ( 172.16.21.0 ) is different from the network that received the arp request packet. And the interface opens the arp proxy, so reply to its own interface mac. BPDU There are two types: configuration BPDU and TCN Set ip next-hop 10.2.2.2 Send BPDU ! // This command is used to advertise the real AS number of the AS outside the federation . Interface vlan 10 Note that, EIGRP the metric is a mixed type, metric. 1 100000 100 255 1500 Parameters specified here, from left to right is the bandwidth, delay, load, reliability, the MTU . It can be flexibly set according to actual needs. After the above configuration is completed, R2 will be in the routing table. PS : At present, the Ethernet frames we use are basically Ethernet II frames. In 802.1q the native vlan is untagged, using Dot1q switches all unmarked frame is forwarded to the native vlan in the ISL on all data frames, including native vlan encapsulation, so if the package is not received The data frame will be discarded (the ISL does not have the concept of a native VLAN ). No passive-interface fast 0/24 Origin: inherited the worst of origin attributes When a violation occurs, the interface enters the err-disable state. 802.1q Interface loopback2 Ip as-path access-list 1 permit _1$ BGP is a classless routing protocol, a distance vector routing protocol, and automatic summarization is turned off by default (this depends on IOS ). The default load balancing method is destination-based load balancing. CEF 's destination-based load balancing is actually implemented by HASHing the destination and source IP addresses . In contrast, in fast forwarding, load balancing based on destination address is performed strictly according to the destination IP address.