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# Generating UDP Checksums in Packets to L2TP Peers

You can configure the router to generate a UDP data integrity checksum in data packets sent to an L2TP peer. The router always uses UDP checksums during transmission and reception of L2TP control packets. Generation of checksums is disabled by default.

- To enable generation of UDP checksums:
  `
  host1(config)#l2tp checksum
  `

  | Note: This command does not affect the way the router checks the UDP data integrity checksum in L2TP data packets that are received from an L2TP peer. The router checks all non-zero received checksums and discards the packet if a data integrity problem is detected.

#### Related Topics

- l2tp checksum

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