Enabling bandwidth control between the ISF and NP6 XAUI ports to reduce the number of dropped egress packets

In some cases, the Internal Switch Fabric (ISF) buffer size may be larger than the buffer size of an NP6 XAUI port that receives traffic from the ISF. If this happens, burst traffic from the ISF may exceed the capacity of an XAUI port and egress or EHP sessions may be dropped during traffic bursts.

You can use the following command to use the ISF switch buffer instead of the NP6 processor buffer to provide bandwidth control between the ISF and XAUI ports. Enabling bandwidth control can smooth burst traffic and keep the XAUI ports from getting overwhelmed and dropping sessions. Since the ISF has a larger buffer it may be able to handle more traffic.

Use the following command to enable bandwidth control:

config system npu

set sw-np-bandwidth {0G | 2G | 4G | 5G | 6G}

end

0G the default, ISF switch buffer memory is not used to buffer egress packets.

2G, 4G, 5G, 6G the amount of ISF switch buffer memory to use for packet buffering to avoid dropped packets. You can adjust the amount of ISF buffer to optimize performance for your system and network conditions.