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Basics of VXLAN

 Maximum number of VLAN is 4000 where  VXLAN can give 16 million Virtualization by adding 24 bit VNI network Identifier. This Vxlan encapsualtion is called Virtual Ethernet modul or VEM. Each VEM has IP address. The IP is assigned to interface VTEP==>> Vxlan Tunnel end point Each VTEP interfaces associated with one or more VNIs. VXLAN usage is can create multiple tunnels over a underlay network. Mainly used on Spine- Leaf Design  bum traffic for broadcast VXLAN can do the load balance between the port channel. Multiple VNI can associated with same multicast group. ========================================= HSRP VS VRRP VS GLBP HSRP and GLBP is cisco properatory VRRP is opensource protocol. HSRP active and standby and VRRP follows master and slave. VRRP can use interface IP as virtual IP. HSRP sents Hello messages but VRRP sents adverticements. GLBP is used to do for load balancing between routers. It uses different mac address for different machine traffic. SSO: ====...
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Basic of packet flow in networks

 Today  I was studying about the network packet flow and come to know that packet transmission is relay on MAC address. 

Default Gateway will remove the actual source address and add the default gateway interface MAC if the packet goes of a network. 


Within Network it shares the MAC address and stores in the MAC table and using that it communicates . 


If the packet goes out of the network, It only deals with MAC by changing source and destination MAC addresses but never touches the IPs.

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