IP SLA is a tool built into Cisco routers. It allows for the continuous monitoring on parts of the network.
There are number of different types of probes that can be set up with IP SLA to monitor different things, such as:
- Packet Loss
- Packet Sequencing
- Server or Website Download Time
- Voice Quality
Configuring an IP SLA
ip sla 10 icmp-echo 192.168.1.50 source-interface GigabitEthernet0/0 frequency 300
The above example will send an ICMP echo to 192.168.1.50 sourced from the IP address on GigabitEthernet0/0 every 300 seconds
The SLA can be switched on with the following command
ip sla schedule 10 life forever start-time now
There is many options on when an SLA should start, and how long it should last for. The above configuration starts the SLA monitoring immediately with no expiration.
The SLA configuration can be viewed with the command
show ip sla configuration 10