I have an ATM network based on LS1010switches and 7206 routers. The interface speed is usually 155Mbps and normally has several PVC's configured across each interface. My question is how do I decide what bandwidth figures I give to each PVC (sustained, peak, burst rates) and what are the limits for each one? I understand the config steps but I am having trouble finding a guide to what the values should be.
That should depend on what min bandwidth you are expecting that the VC should get in cases of congestion. So the values are totally driven by requirement.
In cases where there is no congestion, the VCs will anyways use all the bandwidth available. Whenever you have multiple VCs configured, and you want to assure min. bandwidth to certain VCs in case of congestion, configure the required bandwidth.
The sustained rate is the actual rate which will be assured, while the peak rate is the rate till which the traffic will be allowed to reach in case the bandwidth is accumulated in previous time cycle. The burst size is the max burst it can send in one cycle and you can let the config take the default burst size.
Thanks for your reply, I hope I understand you correctly, if I look at traffic stats, decide the minimum bandwidth needed for a link, assign that as the SCR for the PVC, making sure that the total SCR's for an interface don't exceed the available bandwidth, that the peak rate for a PVC is less than the available bandwidth and finally leave the max burst size blank then I should be OK?
Is the available bandwidth the link bandwidth or a percentage of it?
If OC12 or faster you can simply configure routers for UBR at full OC3 speed, over all the PVCs, then as you find out if any trunk or user interface gets congested, start modifying BW allocation to routers.
If you do hard policing on the PVC the net effect is that routers will never transmit faster than SCR over time and this can be a performance limitation not needed for when you've a lot of BW on trunks.
We are pleased to announce availability of Beta software for 16.6.3.
16.6.3 will be the second rebuild on the 16.6 release train targeted
towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are
looking for early feedback from customers befor...
Introduction Featured Speakers Luis Espejel is the Telecommunications
Manager of IENova, an Oil & Gas company. Currently he works with Cisco
IOS® and Cisco IOS XE platforms, and NX to some extent. He has also
worked as a Senior Engineer with the Routing P...
In this session you can learn more about Layer 3 multicast and the best
practices to identify possible threats and take security measures. It
provides an overview of basic multicast, the best security practices for
use of this technology, and recommendati...