Dell MX5108n OS10 Enterprise Edition User Guide for PowerEdge MX IO Modules Re - Page 589
Con ingress buffer, ingress
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The buffer usage accounting happens for ingress packets on ingress pools and egress packets on egress pool. You can configure ingress packets buffer accounting per priority-group and egress packet buffer accounting per queue level. Configure ingress buffer Default settings In the default settings for ingress buffers, all traffic classes are mapped to the default priority group and the buffers are reserved per default priority group ID 7. All buffers are part of the default pool and all ports share buffers from the default pool. The reserved buffer size is 9360 bytes for the speed of 10G, 25G, 40G, 50G, and 100G. The supported speed varies for different platforms. The following table lists the maximum buffer size for different platforms. Table 13. Maximum buffer size Platforms S4000 S6010-ON, S4048-ON S41xx Z9100-ON Max buffer size 12 MB 16 MB 12 MB 16 MB Default settings for Link-level flow control (LLFC) The following table lists the LLFC buffer settings for the default priority group 7. Table 14. Default setting for LLFC Speed Default reserved buffer Default Xoff threshold Default Xon threshold 10G 45KB 36KB 9KB Default settings for Priority flow control (PFC) The following table lists the PFC buffer settings per PFC priority group. 25G 45KB 36KB 9KB 40G 111KB 75KB 36KB 50G 111KB 75KB 36KB 100G 111KB 75KB 36KB Table 15. Default settings for PFC Speed Default reserved buffer for S4000, S4048-ON, S6010-ON Default reserved buffer for S41xx, Z9100-ON Default Xoff threshold Default Xon threshold Default dynamic share buffer threshold(alpha value) 10G 9KB 9KB 36KB 9KB 9KB 25G NA 9KB 45KB 9KB 9KB 40G 9KB 18KB 75KB 9KB 9KB 50G NA 18KB 91KB 9KB 9KB 100G NA 36KB 142KB 9KB 9KB NOTE: The supported speed varies for different platforms. After the reserved buffers are utilized, each PFC starts consuming shared buffers from the lossless pool with the threshold determined by the alpha value. Configure priority group buffer settings Quality of service 589