Licensing Requirements and Limitations for Traffic Suppression and Storm Control
Involved Network Elements
Other network elements are not required.
Licensing Requirements
Traffic suppression and storm control is a basic function of the switch, and as such is controlled by the license for basic software functions. The license for basic software functions has been loaded and activated before delivery. You do not need to manually activate it.
Version Requirements
Product Model |
Minimum Version Required |
|---|---|
CE12804/CE12808/CE12812 |
V100R001C00 |
CE12816 |
V100R003C00 |
CE12804S/CE12808S |
V100R005C00 |
CE12804E/CE12808E/CE12816E |
V200R002C50 |
For details about the mapping between software versions and switch models, see the Hardware Query Tool.
Software version evolution: V100R001C00 -> V100R002C00 -> V100R003C00 -> V100R003C10 -> V100R005C00 -> V100R005C10 -> V100R006C00 -> V200R001C00 -> V200R002C50 -> V200R003C00 -> V200R005C00 -> V200R005C10 -> V200R019C00 -> V200R019C10
Feature Limitations
Traffic suppression and storm control prevent broadcast storms caused by broadcast packets, multicast packets, and unknown unicast packets. However, they use different modes to control traffic:
- In traffic suppression, rate thresholds are configured for three types of incoming packets on interfaces. The system discards the traffic exceeding the threshold and forwards the traffic within the threshold. In this way, the system limits the traffic rate in an acceptable range. In addition, traffic suppression supports blocking outgoing packets on interfaces.
- In storm control, rate thresholds can also be configured for three types of incoming packets on interfaces. When the traffic rate exceeds a threshold and storm control actions are configured, the device shuts down the interface or blocks the packets.
For the incoming packets of the same type on an interface, only either traffic suppression or storm control can be configured.
On an interface, traffic suppression cannot be configured for both unicast traffic and unknown unicast traffic.
- When traffic suppression is configured on an Eth-Trunk or in a VLAN and interfaces in the Eth-Trunk or VLAN belong to N chips, the actual rate threshold is N times of the configured one.
- When storm control is configured, Eth-Trunk member interfaces support only the pps mode. Storm control for unknown unicast packets cannot be configured on an Eth-Trunk or its member interfaces.
- When traffic suppression for broadcast, multicast, and unknown unicast packets is configured in the BD view on a VXLAN tunnel termination device, the actual rate threshold is different from the configured one.
- For the CE12800, traffic suppression configured in the BD view takes effect only on the incoming packets in a tunnel.
- Traffic suppression and storm control take effect only on Layer 2 traffic.
On the CE12800E, traffic suppression can be configured on Eth-Trunks, but not Eth-Trunk member interfaces. On other switch models, traffic suppression can be configured on Eth-Trunk member interfaces, but not Eth-Trunks.
- For a switch with the CE-L48GT-EA, CE-L48GT-EC, CE-L48GS-EA, CE-L48GS-EC, CE-L24XS-BA, CE-L24XS-EA, CE-L48XS-BA, CE-L48XS-EA, or CE-L24LQ-EA card installed, when multicast traffic suppression is configured but broadcast traffic suppression is not configured on an interface, the QoS CAR setting on the interface does not take effect on broadcast packets.
- For a switch with the CE-L48GT-EA, CE-L48GT-EC, CE-L48GS-EA, CE-L48GS-EC, CE-L24XS-BA, CE-L24XS-EA, CE-L48XS-BA, CE-L48XS-EA, or CE-L24LQ-EA card installed, when traffic suppression in the same mode is configured for the same packets in both the VLAN and interface views, the configuration in the interface view takes effect. For other switches, the configurations in both the VLAN and interface views take effect. For other switch models, traffic suppression takes effect in both the VLAN and interface views.
- For the CE12800E configured with FD-X series cards, when traffic suppression is configured in both the VLAN and BD views, the configuration in the VLAN view takes effect. For other switches, the configuration in the BD view takes effect.
- For a switch with the CE-L48GT-EA, CE-L48GT-EC, CE-L48GS-EA, CE-L48GS-EC, CE-L24XS-BA, CE-L24XS-EA, CE-L48XS-BA, CE-L48XS-EA, or CE-L24LQ-EA card installed, when traffic suppression in the same mode is configured for the same packets in both the BD and interface views, the configuration in the interface view takes effect. For other switches, the configurations in both the BD and interface views take effect. For other switch models, traffic suppression takes effect in both the BD and interface views.
- When an interface enters the Error Down state due to storm control, the interface will not recover if you restart the corresponding card before the interface automatically recovers.
- On a VXLAN network, storm control on the CE12800E that has the ED-E, EG-E, and EGA-E series cards installed does not take effect on broadcast and multicast packets.
- Multicast packets include known and unknown multicast packets. For the CE12800E (equipped with ED-E, EG-E, and EGA-E series cards), multicast traffic suppression takes effect only on unknown multicast packets.
- For switches except the CE12800E that has ED-E, EG-E, and EGA-E series cards installed, and CE6863, storm control does not take effect on VXLAN packets.
- If the fast ICMP reply function is enabled on a device, the traffic suppression function does not take effect for ICMP packets.