hi,
i'm trying to monitor an IPSec VPN tunnel for latency, jitter and packet loss.
udp-jitter using g729a codec doesn't seem to work and i don't see the option for 'icmp-jitter' in an ASR1K. is this the same as 'path-jitter' option?
also what's the difference between a positive and negative jitter? what field or value should i refer to when monitoring jitter in IP SLA?
ASR1K(config)#ip sla 101
ASR1K((config-ip-sla)# icmp-jitter ?
% Unrecognized command
ASR1K((config-ip-sla)#icmp ?
Hostname or A.B.C.D Destination IP address or hostname, broadcast disallowed
ASR1K((config-ip-sla)#?
IP SLAs entry configuration commands:
dhcp DHCP Operation
dns DNS Query Operation
ethernet Ethernet Operations
exit Exit Operation Configuration
ftp FTP Operation
http HTTP Operation
icmp-echo ICMP Echo Operation
mpls MPLS Operation
path-echo Path Discovered ICMP Echo Operation
path-jitter Path Discovered ICMP Jitter Operation
tcp-connect TCP Connect Operation
udp-echo UDP Echo Operation
udp-jitter UDP Jitter Operation
ASR1K((config-ip-sla)#icmp ?
Hostname or A.B.C.D Destination IP address or hostname, broadcast disallowed
ASR1K((config-ip-sla)#path-jitter ?
Hostname or A.B.C.D Destination IP address or Hostname, broadcast disallowed
ASR1K((config-ip-sla)#path-jitter 10.1.1.38 source-ip 10.1.1.37
ASR1K#show ip sla statistics 101 details
IPSLAs Latest Operation Statistics
IPSLA operation id: 101
Latest RTT: 19 milliseconds
Latest operation start time: 06:42:23 UTC Thu Mar 17 2022
Latest operation return code: OK
Over thresholds occurred: FALSE
---- Path Jitter Statistics ----
Hop IP 10.1.1.38:
Round Trip Time milliseconds:
Latest RTT: 19 ms
Number of RTT: 10
RTT Min/Avg/Max: 19/19/20 ms
RTT Sum/Sum2: 192/3688
Jitter time milliseconds:
Number of jitter: 4
Jitter Min/Avg/Max: 1/1/1 ms
Number of positive jitter: 2
Positive jitter Min/Avg/Max: 1/1/1 ms
Positive jitter Number/Sum/Sum2: 2/2/2
Number of negative jitter: 2
Negative jitter Min/Avg/Max: 1/1/1 ms
Negative jitter Number/Sum/Sum2: 2/2/2
Packet Values:
Packet Loss (Timeouts): 0
Out of Sequence: 0
Discarded Samples: 0
Operation time to live: Forever
Operational state of entry: Active
Last time this entry was reset: Never
