# IP SLA (Service-Level Agreement) on Cisco IOS

**URL:** https://forum.networklessons.com/t/ip-sla-service-level-agreement-on-cisco-ios/789
**Category:** Lessons Discussion
**Created:** [December 15, 2016, 11:29am UTC](https://forum.networklessons.com/t/ip-sla-service-level-agreement-on-cisco-ios/789 "2016-12-15T11:29:10Z")
**Posts on this page:** 1
**Showing post:** 51

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### Author: ![lagapidis](https://cdn-forum.networklessons.com/user_avatar/forum.networklessons.com/lagapidis/32/4949_2.png) [@lagapidis](https://forum.networklessons.com/u/lagapidis)
#### Post date: [July 1, 2024, 5:24am UTC](https://forum.networklessons.com/t/ip-sla-service-level-agreement-on-cisco-ios/789/51 "2024-07-01T05:24:09Z")

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Hello Cameron

The quick answer is yes, that’s all you need. This then begs the question, how does it work without additional information?

Well, when you issue the `ip sla responder` command, it causes the target device to simply reply to all incoming IP SLA packets by default, providing additional information to the sending device. All of the “intelligence” of the configuration exists within the IP SLA sending device.

Prior to any SLAs being sent, the sender will send a control message to the responder with any information it needs, thus ensuring that the responder has all the information it needs to respond correctly. Does that make sense?

For more info, take a look at this Cisco command reference:

> **[Cisco IOS IP SLAs Command Reference - icmp-echo through probe-packet priority...](https://www.cisco.com/c/en/us/td/docs/ios/ipsla/command/reference/sla_book/sla_02.html#wp1055041)**

I hope this has been helpful!

Laz

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