Here's a nice link regarding IP SLA in a Cisco router. I needed to configure a udp-jitter probe between two ASR1K routers to monitor its path latency, jitter and packet loss. I just need to configure ip sla responder on ASR2 and the rest of the IP SLA config would be on ASR1
ASR2#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
ASR2(config)#ip sla responder
ASR2(config)#end
ASR2#write memory
Building configuration...
[OK]
ASR2#show run | section ip sla
ip sla responder
-----
ASR1#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
ASR1(config)#ip sla 100
ASR1(config-ip-sla)# udp-jitter 10.1.1.8 16384 source-ip 10.1.1.7 codec g729a
ASR1(config-ip-sla-jitter)# tos 184
ASR1(config-ip-sla-jitter)# frequency 30
ASR1(config-ip-sla-jitter)# owner ASR1 > ASR2 TUNNEL
ASR1(config-ip-sla-jitter)#
ASR1(config-ip-sla-jitter)#ip sla schedule 100 life forever start-time now
ASR1(config)#end
ASR1#show run | sec ip sla 100
ip sla 100
udp-jitter 10.1.1.8 16384 source-ip 10.1.1.7 codec g729a
tos 184
owner ASR1 > ASR2 TUNNEL
frequency 30
ASR1#write memory
Building configuration...
[OK]
ASR1#show run | sec ip sla 100
ip sla 100
udp-jitter 10.1.1.8 16384 source-ip 10.1.1.7 codec g729a
tos 184
owner ASR1 > ASR2 TUNNEL
frequency 30
Just allow a few minutes for the IP SLA probe to run and collect statistics. You can also add monitoring/graph in an NMS for viewing historical data.
ASR1#show ip sla statistics 100 details
IPSLAs Latest Operation Statistics
IPSLA operation id: 100
Type of operation: udp-jitter
Latest RTT: 19 milliseconds
Latest operation start time: 12:56:08 UTC Thu Mar 17 2022
Latest operation return code: OK
Over thresholds occurred: FALSE
RTT Values:
Number Of RTT: 999 RTT Min/Avg/Max: 17/19/29 milliseconds
Latency one-way time:
Number of Latency one-way Samples: 999
Source to Destination Latency one way Min/Avg/Max: 9/10/19 milliseconds
Destination to Source Latency one way Min/Avg/Max: 8/9/18 milliseconds
Source to Destination Latency one way Sum/Sum2: 10565/113077
Destination to Source Latency one way Sum/Sum2: 9150/84308
Jitter Time:
Number of SD Jitter Samples: 997
Number of DS Jitter Samples: 998
Source to Destination Jitter Min/Avg/Max: 0/1/9 milliseconds
Destination to Source Jitter Min/Avg/Max: 0/1/9 milliseconds
Source to destination positive jitter Min/Avg/Max: 1/1/9 milliseconds
Source to destination positive jitter Number/Sum/Sum2: 286/475/1329
Source to destination negative jitter Min/Avg/Max: 1/1/9 milliseconds
Source to destination negative jitter Number/Sum/Sum2: 293/478/1288
Destination to Source positive jitter Min/Avg/Max: 1/1/7 milliseconds
Destination to Source positive jitter Number/Sum/Sum2: 180/229/425
Destination to Source negative jitter Min/Avg/Max: 1/1/9 milliseconds
Destination to Source negative jitter Number/Sum/Sum2: 181/230/468
Interarrival jitterout: 0 Interarrival jitterin: 0
Jitter AVG: 1
Over Threshold:
Number Of RTT Over Threshold: 0 (0%)
Packet Loss Values:
Loss Source to Destination: 1
Source to Destination Loss Periods Number: 1
Source to Destination Loss Period Length Min/Max: 1/1
Source to Destination Inter Loss Period Length Min/Max: 205/794
Loss Destination to Source: 0
Destination to Source Loss Periods Number: 0
Destination to Source Loss Period Length Min/Max: 0/0
Destination to Source Inter Loss Period Length Min/Max: 0/0
Out Of Sequence: 0 Tail Drop: 0 Packet Late Arrival: 0
Packet Skipped: 0
Voice Score Values:
Calculated Planning Impairment Factor (ICPIF): 11
MOS score: 4.06
Number of successes: 6
Number of failures: 0
Operation time to live: Forever
Operational state of entry: Active
Last time this entry was reset: Never
Below are the graphs for network latency, jitter and packet loss taken from NMS.
