Section: 7.1.2 Echo Response
Content: Table 7.1.2-1 specifies the information elements included in the Echo Response message. The Recovery information element contains the local Restart Counter, which is specified in 3GPP TS 23.007[ Restoration procedures ]  [17]) The optional Private Extension contains vendor or operator specific information. Table 7.1.2-1: Information Elements in Echo Response NOTE: Having no Cause IE in the Echo Response message is an exceptional case for a triggered message. Hence, a GTP entity that detects a GTP protocol error, e.g Mandatory IE missing, in the Echo Request message, ignores the IE(s) that are in error and sends Echo Response. In addition it can log the error.