Hi all, I need to shape on egress from CE to PE to match the service provider's 'PVC' speed. The physical interface is gigabit Ethernet. We have a variety of J and SRX boxes running JUNOS 10.0R3.
We have the following access/service speed combos (all on J/SRX ge-x/x/x or SRX xe-x/x/x): 100m/10m, 1g/50m, 1g/100m, 1g/150m, 1g/200m, 10g/1g. I have a JTAC case running on this but I haven't been making good progress. The carrier's EoSDH access network throws away traffic when bursts fill up the relatively small buffers (~130K) in their Alcatel equipment. I need to tune the shaper to control/buffer bursts. Through the JTAC case (which I have just asked to be escalated), I have NOT been able to determine: 1. how the burst size is calculated when (for example) 'shaping-rate 150m' is used without any other configuration on a logical unit. 2. how, if at all, the burst size can be tuned. I need to ensure I drive the burst size (in bytes) down to <=130K for all of the access/speed combinations above How is everyone doing this in the real world? Lastly, through my investigations with Juniper folks outside the JTAC, I have become aware of two things: - The default burst size on J-series cannot be configured and (whatever it is,) is too high - PR/511498. "The shaper burst-size was calculated based on interface-bandwidth instead of the shaping-rate". Fixed in 10.0-20100326.0 daily SR or later, apparently. No more info. I hate to draw the comparison but detailed information about how the shaper works and can be tuned is readily available in vendor C land :-/ Cheers, Dale _______________________________________________ juniper-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/juniper-nsp
