What is source sequence number in AODV?

The Source Sequence Number in the RREQ message is the node’s own sequence number. The Flooding ID field is incremented by one from the last Flooding ID used by the current node. Each node maintains only one Flooding ID.

What is sequence number in routing protocol?

Each entry in the routing table contains a sequence number, the sequence numbers are generally even if a link is present; else, an odd number is used. The number is generated by the destination, and the emitter needs to send out the next update with this number.

Why do we use sequence numbers in AODV ad hoc on demand distance vector?

AODV makes use of sequence numbers to ensure route freshness. They are self-starting and loop-free besides scaling to numerous mobile nodes. In AODV, networks are silent until connections are established.

What is meant by AODV and explain about AODV routing protocol?

AODV (Ad-hoc On-demand Distance Vector)[7] is a loop-free routing protocol for ad-hoc networks. It is designed to be self-starting in an environment of mobile nodes, withstanding a variety of network behaviors such as node mobility, link failures and packet losses. At each node, AODV maintains a routing table.

What is the difference between source and destination?

For the inbound traffic, the source is the remote host. For outbound traffic, the destination is the remote host. If the client communicates with a Web server and the traffic is inbound, then the source host is the Web server and the destination host is the client.

What is the importance of destination sequence number?

The destination sequence number constitutes a measure ap- proximating the relative freshness of the information held—a higher number denotes newer information. The routing ta- ble is updated whenever a node receives an AODV control message (RREQ, RREP or RERR) or detects a link break.

What is the purpose of having destination sequence number?

AODV uses destination-based sequence numbers to main- tain loop-free routes on demand, while allowing packet for- warding to be based solely on the packet destination. The sequence number carried in a route request (RREQ) elicits only fresher route replies (RREP) with an equal or higher sequence number.

Can a destination node responds with route reply?

To return the Route Reply, the destination node must have a route to the source node. If the route is in the Destination Node’s route cache, the route would be used. Otherwise, the node will reverse the route based on the route record in the Route Request message header (this requires that all links are symmetric).

How is RERR propagated in AODV?

Link failures are propagated by a route error (RERR) message from the site of a link break to the source node for that route. When the next hop link breaks, RERR packets are sent to a set of neighboring nodes that communicate over the broken link with the destination.

What is Rreq and Rrep?

RREQ = Route Request message, RREP = Route Reply.

What is the difference between source and destination network address translation?

Destination NAT translates the destination addresses and ports of packets. Source NAT translates private IP addresses into public IP addresses so that users on an intranet can use public IP addresses to access the Internet.

What is the difference between source and destination IP?

Source IP—The source IP address for traffic from which traffic is forwarded (Any, Single Address or Address Range). Destination IP—The IP address of the server to which traffic is forwarded.