S1 Path Latency and Jitter Check – Ping Test Review

4G LTE
, , , ,
1

Dear Ericsson Experts,

Could you please review the ping test results shown in the screenshot above and advise whether there are any indications of latency or jitter issues on the S1 transport path for this site?

Based on the collected ping data, I would like to confirm if the observed response times and variation are within normal limits or if they suggest any potential performance concerns.

S1 Path Latency and Jitter Check – Ping Test Review
S1 Path Latency and Jitter Check – Ping Test Review395×211 22.2 KB

(sensitive information anonymized)

NODE_A> mcc Router=vr_LTE_S1,InterfaceIPv4=LTE_S1,AddressIPv4=LTE_S1 ping -c 10 -s 2449 DESTINATION_IP
YYYYMMDD-HH:MM:SS MGMT_IP NODE_SOFTWARE_VERSION stopfile=/tmp/XXXX
Run COMCLI command(s) on following 1 MOs ?

===============================================================
ID_XXXX Transport=1,Router=vr_LTE_S1,InterfaceIPv4=LTE_S1,AddressIPv4=LTE_S1
===============================================================

Run COMCLI commands(s) on 1 MOs. Are you Sure [y/n] ? y

===============================================================
Id   MO
===============================================================

ID_XXXX Router=vr_LTE_S1,InterfaceIPv4=LTE_S1,AddressIPv4=LTE_S1
>ManagedElement=NODE_A,Transport=1,Router=vr_LTE_S1,InterfaceIPv4=LTE_S1,AddressIPv4=LTE_S1
>ping -c 10 -s 2449 DESTINATION_IP

PING DESTINATION_IP (DESTINATION_IP) 2449(2477) bytes of data.
2457 bytes from DESTINATION_IP: icmp_seq=1 ttl=64 time=0.067 ms
2457 bytes from DESTINATION_IP: icmp_seq=2 ttl=64 time=0.055 ms
2457 bytes from DESTINATION_IP: icmp_seq=3 ttl=64 time=0.059 ms
2457 bytes from DESTINATION_IP: icmp_seq=4 ttl=64 time=0.058 ms
2457 bytes from DESTINATION_IP: icmp_seq=5 ttl=64 time=0.059 ms
2457 bytes from DESTINATION_IP: icmp_seq=6 ttl=64 time=0.061 ms
2457 bytes from DESTINATION_IP: icmp_seq=7 ttl=64 time=0.098 ms
2457 bytes from DESTINATION_IP: icmp_seq=8 ttl=64 time=0.064 ms
2457 bytes from DESTINATION_IP: icmp_seq=9 ttl=64 time=0.062 ms
2457 bytes from DESTINATION_IP: icmp_seq=10 ttl=64 time=0.066 ms

--- DESTINATION_IP ping statistics ---
10 packets transmitted, 10 received, 0% packet loss, time 9376ms
rtt min/avg/max/mdev = 0.055/0.064/0.098/0.011 ms

===============================================================
Total: 1 MOs
2

The latency is extremely low, which is very good. However, it is unlikely that this ping is reaching the MME; it appears to be going to a local router instead.

3

Do you mean that this ping is from the BB to the TCU?

4

Maybe the ping is from the BB to the router located near NODE_A.

5

As far as I know, you can ping the MME IP using this method.

6

Please run a traceroute and share the results with the transport team.