CCNA,CCNP,CCIE Blogs

Explain Border Gateway Protocol (BGP) ? Border Gateway Protocol advertises, learns and chooses the best paths inside the global Internet. When two ISPs connect, they typically use BGP to exchange routing information. Enterprises also sometimes uses BGP to exchange routing information with ISPs, allowing the Enterprise routers to learn Internet routes. when we have multiple Internet connections and we want to influence some packets to take one path and some packets to take another we use BGP. Can Routers on different subnet become BGP neighbors? BGP does not require neighbors to be attached to the same subnet. Instead, BGP routers use a TCP connection between the routers to pass BGP messages allowing neighboring routers to be on the same or different subnet. What TCP port number BGP use for connection? BGP uses TCP port 179 for the connection. Difference between eBGP and iBGP neighbor? In iBGP, neighborship is formed between routers within the same AS (autonom...

What is EIGRP? Enhanced Interior Gateway Routing Protocol (EIGRP) is an enhanced distance vector routing protocol which Uses Diffused Update Algorithm (DUAL) to calculate the shortest path. It is also considered as a Hybrid Routing Protocol because it has characteristics of both Distance Vector and Link State Routing Protocols. EIGRP supports classless routing and VLSM, route summarization, incremental updates, load balancing and other features. What are the requirements for neighborship in EIGRP? The following fields in a hello packet must match for routers to become neighbors:- 1.Autonomous System number. 2.K-values. 3.Authentication. 4.Primary address should be used. 5.If static neighborship than should be define on both sides. What are the metric of EIGRP protocol & its default values? 1.Bandwidth (K1=1) 2.Load (K2=0) 3.Delay (K3=1) 4.Reliability (K4=0) 5.Maximum Transmission Unit (K5=0) By default, EIGRP only uses bandwidth (K1) and delay ...

Use a Cisco Router AS A Frame Relay Switch ................................................................................................................................................ Frame Relay Router [R2]  Router (Config)# Frame-relay switching  Interface Serial0/0  no shutdown  No ip address  Encapsulation frame-relay   Clock rate 64000  Frame-relay lmi-type  ANSI  Frame-relay intf-type  dce   Frame-relay route 110 interface Serial0/1 130 !  Interface Serial0/1  no ip address  no shutdown  Encapsulation frame-relay  Clock rate 64000  frame-relay lmi-type ansi  frame-relay intf-type dce   frame-relay route 130 interface Serial0/0 110 ! interface Serial0/2  no ip address  no shutdown  encapsulation frame-relay  clock rate 64000  frame-relay lmi-type ansi  frame-relay intf-type dce ...