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January 26, 2009
IP SLA Sample Configuration for Voice
IP SLA has the ability to measure "real-time" WAN connection quality. You can then use the results of the measurement for routing decisions (such as choosing an alternate path). This is especially effective for VoIP connections. The following sample configuration can be used to create a IP SLA Jitter/Packet Loss monitor for use with VoIP deployments:
IP SLA Source
Source(config)#ip sla 100 !Some IOS versions use ip sla monitor
Source(config-ip-sla)#udp-jitter 172.16.1.2 65424 codec g729a
Source(config-ip-sla-jitter)#tos 176 !Marks packets with DSCP EF (IP Precedence 5)
Source(config-ip-sla-jitter)#exit
Source(config)#ip sla schedule 100 recurring start-time now
Source(config)#interface s0/1/0
Source(config-if)#ip address 172.16.1.1 255.255.255.0
IP SLA Responder
Responder(config)#ip sla responder !Some IOS versions use ip sla monitor
Responder(config)#interface s0/1
Responder(config-if)#ip address 172.16.1.2 255.255.255.0
Posted by JC at January 26, 2009 1:08 PM
Comments
what is the minimum ios version?
Posted by: tom at January 26, 2009 2:13 PM
Bummer dude, your forum's been spammed...hard.
Damn spammers have been relentless the last couple of months.
Posted by: Scott at January 27, 2009 7:17 AM
Jeremy Sir,
Sir because, I am following your footprints to be CCIE.. I am going to give CCNA exam next month. All I am doing is CCNA these days.. I am working as Network-Voice Engineer in Wipro Infotech, India. I love to study.. All i need is your support to be CCIE. I request you to send me your contact number or Email-Id so that i can get connected to you for help. I am really impressed by your concepts. Please reply.....
Posted by: Sukhpreet Singh at January 27, 2009 11:57 AM
Add a mix of cacti into that soup and you get a damn good monitoring system.
http://forums.cacti.net/about4136.html
long live "RTR"
Posted by: swampie at January 27, 2009 1:31 PM
Hi Jeremy,
Just like to bring up from your CCNA voice book. The Ethernet Header size you have put is wrong, it should be 38 bytes (without 802.1Q tag) or 42 bytes (with 802.1Q tag).
Correct me if I am wrong.
http://sd.wareonearth.com/~phil/net/overhead/
Posted by: Amit at January 27, 2009 9:39 PM
Small nitpick. I thought the DSCP value for EF traffic was 46 and therefore the TOS byte would be 184.
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