CNA configuration and deployment
Assigning USTATs to Providers
module ustat commands now need to be defined for each WAN link:
module ustat provider_1
link provider_1
vip 172.25.5.1
The ustat module specifies the association of the USTAT module to a specific WAN link and the virtual IP (VIP) address to this WAN link.
USTAT GRE Tunnels
To configure GRE Tunnels for measurements, use the interface tunnel command, then assign the tunnel to a ustat:
interface tunnel 1
ip address 172.25.5.130 255.255.255.252 tunnel destination 10.6.0.1
end
module ustat provider_1
ip route 10.6.0.1 255.255.255.255 172.16.6.1 ip route 0.0.0.0 0.0.0.0 tunnel1
end
Measurements
In this scenario, we’ll assume that CNA will only measure to and optimize signaling and bearer targets. We create an address group that contains all signaling targets. We also create an address group that contains all bearer targets. Then, we create within the engine module active measurement groups for the signaling and bearer targets, respectively. The respective groups of addresses are added to the list of targets within the measurement group. The measurement type, rate, and loss timeout are also specified. It is recommended that high measurement rate of 5 per second, and an aggressive timeout (200 ms) are used, to insure
group signaling_targets Prefix signaling_1/32 Prefix signaling_2/32
end
group bearer_targets
