01-23-2009 10:43 AM - edited 03-13-2019 06:00 PM
I have several hundred routers in my environment that we are utilizing ssh2 but I cannot get them to respond to the source router's query. Other routers that we are using telnet are responding.
I am just learning about IP sla so am looking to learn some 101 on the way to troubleshooting this as well...
01-29-2009 06:49 AM
Need more info such as:
Show tech of the box on which the IP SLA is responding
Debugs for IP SLA from the box
01-29-2009 07:34 AM
Here's some sample SLA configuration that I did up in the lab:
Sending side:
ip sla monitor 3
type jitter dest-ipaddr 172.16.1.2 dest-port 16384 codec g711ulaw codec-numpackets 30
tos 184
frequency 10
ip sla monitor schedule 3 start-time now
ip sla monitor 4
type jitter dest-ipaddr 172.16.35.5 dest-port 16386 codec g711ulaw codec-numpackets 20
tos 184
frequency 5
ip sla monitor schedule 4 start-time now
Receiving side:
ip sla monitor responder
R3#sh ip sla moni stat
Round trip time (RTT) Index 3
Latest RTT: 54 ms
Latest operation start time: 00:11:46.823 UTC Tue Jan 1 2008
Latest operation return code: OK
RTT Values
Number Of RTT: 13
RTT Min/Avg/Max: 108/124/153 ms
Latency one-way time milliseconds
Number of one-way Samples: 0
Source to Destination one way Min/Avg/Max: 0/0/0 ms
Destination to Source one way Min/Avg/Max: 0/0/0 ms
Jitter time milliseconds
Number of Jitter Samples: 7
Source to Destination Jitter Min/Avg/Max: 5/6/7 ms
Destination to Source Jitter Min/Avg/Max: 1/1/1 ms
Packet Loss Values
Loss Source to Destination: 17 Loss Destination to Source: 0
Out Of Sequence: 0 Tail Drop: 0 Packet Late Arrival: 0
Voice Score Values
Calculated Planning Impairment Factor (ICPIF): 25
Mean Opinion Score (MOS): 3.50
Number of successes: 20
Number of failures: 0
Operation time to live: 3393 sec
Round trip time (RTT) Index 4
Latest RTT: 2 ms
Latest operation start time: 00:12:01.167 UTC Tue Jan 1 2008
Latest operation return code: OK
RTT Values
Number Of RTT: 20
RTT Min/Avg/Max: 2/2/2 ms
Latency one-way time milliseconds
Number of one-way Samples: 0
Source to Destination one way Min/Avg/Max: 0/0/0 ms
Destination to Source one way Min/Avg/Max: 0/0/0 ms
Jitter time milliseconds
Number of Jitter Samples: 19
Source to Destination Jitter Min/Avg/Max: 0/0/0 ms
Destination to Source Jitter Min/Avg/Max: 0/0/0 ms
Packet Loss Values
Loss Source to Destination: 0 Loss Destination to Source: 0
Out Of Sequence: 0 Tail Drop: 0 Packet Late Arrival: 0
Voice Score Values
Calculated Planning Impairment Factor (ICPIF): 1
Mean Opinion Score (MOS): 4.34
Number of successes: 6
Number of failures: 0
Operation time to live: 3570 sec
For ICMP you shouldn't need to enable ip sla responder, but for other packets like UDP, RTP, you will. Also ensure that the two routers share the same NTP source and that they are both sync'd.
hth,
nick
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