[unknown] smf# config
Entering configuration mode terminal
[unknown] smf(config)# endpoint gtp
[unknown] smf(config-endpoint-gtp)#
[unknown] smf(config-endpoint-gtp)# interface
s2b s5 s5e s8 s11
[unknown] smf(config-endpoint-gtp)# interface s5
[unknown] smf(config-interface-s5)# echo interval 60
echo – Enable gtpc path management
interval - Configure echo interval in seconds, ranging from <60-360>
[unknown] smf(config-interface-s5)# echo retransmission-timeout 3
retransmission-timeout - Configure the echo retransmission timeout in seconds, ranging from <1–20>
[unknown] smf(config-interface-s5)# echo max-retransmissions 10
max-retransmissions - Configure maximum retries for GTP echo request, ranging from <0-10>
[unknown] smf(config-interface-s5)#