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NOTE: Beginning with software release 15.18, the HP 2920, 3800, and 5400R switches support egress per-queue rate-limiting, including configuration on static trunks. (Egress per-queue rate-limiting is not supported on dynamic LACP or distributed (DT) trunks.) |
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Egress rate-limiting permits administrators to configure the maximum percentage of traffic allowed to egress an interface for each priority queue.
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Egress per-queue rate-limiting allows configurations on both physical ports and static trunks.
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The number of queue percentages will vary based on the number of queues configured on the device (i.e., 2-queues, 4-queues, 8-queues).
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Configuration is allowed on a static trunk (manual HP trunks and static LACP trunks), but the actual traffic enforcement occurs per-port on the individual ports belonging to the trunk.
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While limits on all egress traffic (
rate-limit all
) and limits on specific egress queues (rate-limit queues
) can be configured at the same time on a given port (i.e., can be concurrent features), this may result in lower actual limits than expected. This is particularly true of queue-limits, where a packet may be dropped for the port as a whole even when the queue is below its limit. -
The egress per-queue rate-limiting is not configurable on dynamic LACP and Distributed trunks.
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Other rate-limiting features (ingress and egress) are not supported on trunked ports.
The rate-limit queues out
command configures the maximum percentage of outbound port traffic that can be transmitted by each queue available on a port or static trunk.
The rate-limit queues out
command is not supported on either distributed trunks or dynamic trunks.
Syntax:
[no] intrate-limit queues out percent
<port-list>
queue1_%
queue2_%
queue3_%
queue4_%
queue5_%
queue6_%
queue7_%
queue8_%
Syntax:
Output for the show running-config command
HP-Switch# show running-config Running configuration: ; J9727A Configuration Editor; Created on release #WB.15.18.0000x ; Ver #09:14.29.eb.8f.fc.f3.ff.37.2d:ba hostname "HP-2920-24G-PoEP" module 1 type j9727a trunk 10-12 trk1 trunk interface 5 rate-limit queues out percent 60 50 70 60 40 80 90 30 exit interface Trk1 rate-limit queues out percent 60 50 70 60 40 80 90 30 exit snmp-server community "public" unrestricted oobm ip address dhcp-bootp exit vlan 1 name "DEFAULT_VLAN" untagged 1-9,13-24,A1-A2,B1-B2,Trk1 ip address dhcp-bootp exit spanning-tree Trk1 priority 4
Syntax:
Using the
show rate-limit
command with thequeues
option added in software release 15.18 enables you to specify both individual ports and port trunk names to display the output. If nothing is specified, all physical ports and any static, non-DT trunks are displayed with their current settings previously configured with therate-limit queues
command. The optionalparameter limits the display output to the listed ports (and static, non-DT trunks, if any).
<port-list>
Command output when no port list specified
HP-Switch# show rate-limit queues Outbound Queue-Based Rate-Limit % Port Q1 Q2 Q3 Q4 Q5 Q6 Q7 Q8 ------ --- --- --- --- --- --- --- --- 1 5 10 10 5 10 10 20 20 2 5 10 10 5 10 10 20 20 3 5 10 10 5 10 10 20 20 4 5 10 10 5 10 10 20 20 7 5 10 10 5 10 10 20 20 22 5 10 10 5 10 10 20 20 24 5 10 10 5 10 10 20 20 Trk1 5 10 10 5 10 10 10 20 Trk6 5 10 10 5 10 10 10 20Output with trunk queue set to 100 percent
HP-Switch# show rate-limit queues Outbound Queue-Based Rate-Limit % Port Q1 Q2 Q3 Q4 Q5 Q6 Q7 Q8 ------ --- ------ --- ------ --- --- --- ------ 5 5 10 10 5 10 10 20 20 8 5 10 10 5 10 10 20 20 18 5 10 10 5 10 10 20 20 Trk1 5 10 10 5 10 10 20 100