How to Configure Rate Limit on S6700? - Computers & Internet

https://e.huawei.com/en/related-page/products/enterprise-network/switches/campus-switches/S6700/brochure/switches-s6700

http://www.router-switch.com/pdf/s6700-48-ei-datasheet.pdf

When you configure rate limit on S6720-54C-EI-48S-AC, the following configuration is recommended:
Set the CIR, CBS, and PBS values but not the PIR value. CBS = 200 x CIR PBS = 2 x CBS = 2 x 200 x CIR = 400 x CIR The CIR value is expressed in kbit/s, and the CBS and PBS values are expressed in bytes.
Set the rate limit for outgoing packets on the interface to 10 Mbit/s. [HUAWEI] interface ethernet 0/0/1 [HUAWEI-Ethernet0/0/1] qos lr outbound cir 10240 cbs 2048000
Set the rate limit for incoming packets on the interface to 10 Mbit/s. [HUAWEI] interface ethernet 0/0/1 [HUAWEI-Ethernet0/0/1] qos lr inbound cir 10240 cbs 2048000

When the shutdown and undo shutdown commands are used on a trunk member interface of an Huawei S6700, the trunk bandwidth changes. The ifnet sends a port rate change event. MSTP responds to the event and delivers the Block flag to the outbound port.
As a result, the outbound port cannot forward traffic. After 15s, MSTP delivers the forward flag to the port. Traffic can be forwarded.
When the shutdown and undo shutdown commands are used on a trunk member interface of an S6700, traffic is interrupted for 15s.

No, Huawei S6700 Series Switches don't have PAC-350WA-B, it only apply to Huawei S5710-HI series switches.

Configure Rate Limit on S2700&S3700&S5700? When you configure rate limit, the following configuration is recommended:
· Set the CIR, CBS, and PBS values but not the PIR value.
· CBS = 200 x CIR
· PBS = 2 x CBS = 2 x 200 x CIR = 400 x CIR
The CIR value is expressed in kbit/s, and the CBS and PBS values are expressed in bytes.
Set the rate limit for outgoing packets on the interface to 10 Mbit/s.
[HUAWEI] interface gigabitethernet 0/0/1
[HUAWEI-GigabitEthernet0/0/1] qos lr outbound cir 10240 cbs 2048000
Set the rate limit for incoming packets on the interface to 10 Mbit/s.
[HUAWEI] interface gigabitethernet 0/0/1
[HUAWEI-GigabitEthernet0/0/1] qos lr inbound cir 10240 cbs 2048000
NOTE:
A traffic policy can be used in the physical interface view, Eth-Trunk interface view, and VLAN view.

The default aging time of ARP entries is 20 minutes. You can run the arp expire-time command to change the aging time.
You can also change the number of ARP probes by running the arp detect-times command. The default number of ARP probes is 3.
When the aging time of an ARP entry expires, the device sends a probe packet to the corresponding IP address every 5 seconds. If the device does not receive any response after the specified number of probes, it deletes the ARP entry.
For example, the aging time of ARP entries is set to 60s and the number of ARP probes is set to 6.
After 60s since an ARP entry is generated, the device sends an ARP probe every 5s. If the device does not receive any response after sending six probes, it deletes the ARP entry. Therefore, the actual aging time of the ARP entry is (60 + 6 x 5) = 90s.
NOTE:
For V100R002 version, the S2700/S3700/S5700/S6700 supports the 1/2 probe time and 3/4 probe time. The numbers of probes on the two time points are both 3 and cannot be changed. For example, if the aging time is 20 minutes (1200s) and the number of ARP probes is 6, the SS2700/S3700/S5700/S6700 sends three ARP probes at an interval of 5s after 10 minutes. After 15 minutes, the S2700/S3700/S5700/S6700 also sends three ARP probes at an interval of 5s. After 20 minutes, the S2700/S3700/S5700/S6700 sends six ARP probes at an interval of 5s. If the S2700/S3700/S5700/S6700 does not receive any response, it deletes the ARP entry

This is the method of configuring Switch:
Configure QoS CAR on an interface to implement rate limiting in the inbound direction. Alternatively, configure a traffic policy with an ACL-based traffic classifier to limit the rate of packets matching the ACL.
QoS CAR cannot be applied to outbound traffic, but you can limit the rate of outbound traffic using a traffic policy or traffic shaping.

It's different from configuring rate limit for Huawei S6700 and other Huawei Swithes. The article as below may help you for your question
Huawei Networking Products News and FAQ

The refresh rate can be configured in Windows in the display properties. It does require that your monitor has been identified or configured, otherwise it can limit the refresh rate.
You can overrule the setting to not limit the refresh rate to compatible devices only, but be careful to not configure it too high as it can break your monitor!