bgp

configuration (etherchannel Interface) show etherchannel port-channel View port-channel Interface Information show ip dhcp binding view DHCP address allocation Show ip dhcp pool view address pool information show ip dhcp snooping view DHCP listening configuration show port-security view port security configuration Show ip protocols view detailed routing protocol data show ip rip database view RIP database show ip VPN neighbors view the OSPF neighbor show ip VPN topology view the run show ip osp

existsecond, solve the routing1. View neighbor relationships between PE(including VPNV4 's neighbor relationship show ip bgp vpnv4 all sum) See the neighbor relationship between PE and route reflector if no neighbor is built between PEA , Solving common BGP neighbor problemsB , VPN must be activated in the cluster2 , there is a neighbor after check is PE no corresponding route show ip Route VRF * * * (1

status in the table, however, the routing selection protocol only notifies the network that has been learned through the process. When routing selection processes do not share information about the network system, it is called night routing (ships in night, SIN )｡ 3. Default seed measurement values. The default seed measurement values of RIP, IGRP, and VPN are all infinite. They do not enter the route selection table unless the default value is changed; the default IS-IS metric value IS 0, but

of a failure, but other interfaces can still telnet, meaning that the TCP connection to the router still exists. Therefore, the selected Telnet address must never be down, and the virtual interface satisfies such requirements. Because such interfaces do not require interoperability with the end-to-end, the address of the loopback interface is usually specified as a 32-bit mask in order to conserve address resources.2 using this interface address as a dynamic routing protocol OSPF,

will be lower, which is intolerable for some backbone routers. Dynamic Routing Protocol The dynamic routing protocol is briefly introduced before route redistribution. Under normal circumstances, vrouters use various routing protocols, such as OSPF, IS-IS, and BGP, to calculate and maintain their own route tables, route entries generated by all protocols are finally summarized into one routing management module. For a destination IP address, various

link State hierarchical routing algorithm of RIP in the Internet communication body. OSPF features include least-cost routing, multi-path, and load balancing. OSPF was developed from an earlier version of the IS-IS protocol and has two main features: first, the Protocol IS open, for example, RFC 1247 has OSPF rules. Second, OSPF is built on the SPF algorithm. SPF is also called DIJKSTRA algorithm. It is named after the founder of this algorithm. The Border Gateway Protocol

OSPF metric value Propagation 1) when the PE re-distributes ospf to the MP-IBGP, The MP-IBGP uses the OSPF metric value to set the bgp med. 2) When the PE re-distributes BGP to OSPF. Use the MED of BGP to set the measurement values of OSPF internal or external routes. Tutorial topology: 650) this. width = 650; "style =" width: 680px; height: 164px "border =" 0 "

inside source list 102 pool pool2 overload Ip classless Ip route 192.168.2.0 255.255.255.0 192.168.4.2 Ip route 192.168.3.0 255.255.255.0 192.168.5.2 Ip http server ! Access-list 101 permit ip 192.168.1.0 0.0.255 192.168.2.0 0.0.255 Access-list 102 permit ip 192.168.1.0 0.0.255 192.168.3.0 0.0.255 ! Line con 0 Exec-timeout 0 0 Logging synchronous Line aux 0 Line vty 0 4 ! End R1 # show ip rou R1 # show ip route Codes: C-connected, S-static, I-IGRP, R-RIP, M-mobile, B-

Supplement: communication process between 172.17.4.1 and 172.17.5.1If you have read the article carefully, you will know that 172.17.4.1 and 172.17.5.1 are not advertised to OSPF. They are advertised to BGP. Normally, both RT4 and RT5 have learned the BGP Route from the other party. Packet encapsulation is okay, but when the packet is sent to the OSPF area, there is no route between the two network segments

. Open Shortest Path First version 2nd (OSPFv2)-it is the second version of OSPF. OSPF is a connection status routing protocol, which is an IETF of an interconnected network engineering task group. The internal gateway protocol workgroup is designed for IP addresses, it is the next link State hierarchical routing algorithm of RIP in the Internet communication body. OSPF features include least-cost routing, multi-path, and load balancing. OSPF was developed from an earlier version of the IS-IS pr

is the next link State hierarchical routing algorithm of RIP in the Internet communication body. OSPF features include least-cost routing, multi-path, and load balancing. OSPF was developed from an earlier version of the IS-IS protocol and has two main features: first, the Protocol IS open, for example, RFC 1247 has OSPF rules. Second, OSPF is built on the SPF algorithm. SPF is also called DIJKSTRA algorithm. It is named after the founder of this algorithm. The Border Gateway Protocol

connection status routing protocol, which is an IETF of an interconnected network engineering task group. The internal gateway protocol workgroup is designed for IP addresses, it is the next link State hierarchical routing algorithm of RIP in the Internet communication body. OSPF features include least-cost routing, multi-path, and load balancing. OSPF was developed from an earlier version of the IS-IS protocol and has two main features: first, the Protocol IS open, for example, RFC 1247 has OS

only lists routes whose protocols are rtprotoScope scope_val only lists routes with scope_val ranges.Type type only lists routes of type.Dev name only lists routes by device nameVia prefix only lists the routes that pass the prefix in the next hop.SRC prefix only lists routes whose source address belongs to the prefix.Realm realmid or raalm fromrealm/torealm only lists routes whose realm is realmid. Example Calculate the number of routes using the gated/BGP