Here are some common data packets used in routing:

1. Request packet: A request packet is used to request routing information from a router in the network. It is used in protocols like RIP, OSPF, and BGP.
2. Response packet: A response packet is used to respond to a request packet with routing information. It contains the requested information, such as the best path to a particular network.
3. Update packet: An update packet is used to update the routing tables of routers in the network. It contains information about changes in network topology, such as when a new network is added or when a link goes down.
4. Advertisement packet: An advertisement packet is used to advertise a route to a network or subnet. It is typically used in protocols like OSPF and BGP.
5. Hello packet: A hello packet is used to establish and maintain neighbor relationships between routers in a network. It is used in protocols like OSPF and IS-IS.
6. Acknowledgment packet: An acknowledgment packet is used to confirm that a packet has been received. It is typically used in protocols like TCP and ICMP.
7. Redirect packet: A redirect packet is used to inform a host or router that it should send traffic to a different next-hop router. It is typically used in protocols like ICMP.

These are just some examples of the many different types of data packets used in routing. The specific packets used will depend on the routing protocol being used and the specific network topology.