Dell PowerEdge M610x Fabric OS Administrator’s Guide - Page 443
Limiting traffic from a particular device, Disabling ingress rate limiting
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QoS: SID/DID traffic prioritization 18 • Ingress rate limiting is available only on the following platforms: Brocade 300, 5100, 5300, 5410, 5424, 5450, 5460, 5470, 5480, 7800, 8000, VA-40FC, Brocade Encryption Switch, Brocade DCX, or DCX-4S. • QoS traffic prioritization takes precedence over ingress rate limiting. • Ingress rate limiting is not enforced on trunked ports. Virtual Fabrics considerations: If Virtual Fabrics is enabled, the rate limit configuration on a port is on a per-logical switch basis. That is, if a port is configured to have a certain rate limit value, and the port is then moved to a different logical switch, it would have no rate limit applied to it in the new logical switch. If that same port is moved back to the original logical switch, it would have the original rate limit take effect again. Limiting traffic from a particular device 1. Connect to the switch and log in as admin. 2. Enter the portCfgQos --setratelimit command. portcfgqos --setratelimit slot/port ratelimit Example of setting the rate limit on slot 3, port 9 to 4000 Mbps portcfgqos --setratelimit 3/9 4000 Disabling ingress rate limiting 1. Connect to the switch and log in as admin. 2. Enter the portCfgQos --resetratelimit command. portcfgqos --resetratelimit slot/port Example of disabling ingress rate limiting on slot 3, port 9 portcfgqos --resetratelimit 3/9 QoS: SID/DID traffic prioritization SID/DID traffic prioritization allows you to categorize the traffic flow between a host and target as having a high or low priority. For example, you could assign online transaction processing (OLTP) to high priority and backup traffic to low priority. All flows without QoS prioritization are considered medium priority. High, medium, and low priority flows are allocated to different virtual channels (VCs). High priority flows receive more VCs than medium priority flows, which receive more VCs than low priority flows. The virtual channels are allocated as shown in Table 85. TABLE 85 Priority Virtual channels assigned to QoS priority Number of VCs VCs assigned High priority 5 Medium priority 4 Low priority 2 10, 11, 12, 13, 14 2, 3, 4, 5 8, 9 Fabric OS Administrator's Guide 403 53-1001763-02
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