In which situation do EF queues preempt the idle bandwidth

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When traffic is not congested on a device interface and AF or BE queues have idle bandwidth, EF queues can preempt the idle bandwidth.

When the SRU80, SRU200, SRUX5, or SRU400 is used, Ethernet interfaces and POS interfaces do not support idle bandwidth preempted by EF queues.

Other related questions:
How is the bandwidth calculated in the AF and EF queues on a tunnel interface
The tunnel interface is a virtual interface that cannot sense the bandwidth on the physical interface. Therefore, the following requirements are specified: -If the qos gts command is not executed on the tunnel interface, the available bandwidth is 1 Gbit/s. -If the qos gts command has been executed on the interface, the available bandwidth is the value of cir.

What is the maximum bandwidth supported by the TE60
TE60 supports a maximum of 9 Mbit/s access bandwidth, with 1 Mbit/s for each channel of video site. TE40 and TE50 support a maximum of 6 Mbit/s access bandwidth, with 1 Mbit/s for each channel of video site TE30 supports a maximum of 6Mbit/s access bandwidth. For each channel of video site, if signals are not encrypted, the access bandwidth is 1536 kbit/s. If signals are encrypted, the access bandwidth is 1 Mbit/s.

Application scenarios and examples of ping
The application scenarios of the ping operation are as follows (the ping command is executed in any view): Scenario 1: Check the local protocol stack. Run the ping command to check whether the local TCP/IP stack is normal. For example: ping 127.0.0.1 Scenario 2: On an IP network, check whether the destination host is reachable.Run the ping command on the AR and configure the AR to send ICMP Echo Request packets to the remote device. If the AR can receive ICMP Echo Reply packets from the remote device, the route to the remote device is reachable. For example: ping 10.1.1.2 //Check whether the host at 10.1.1.2 is reachable. Scenario 3: Check whether the remote device is reachable on a Layer 3 VPN. On a Layer 3 VPN, devices do not have route information of each other, so the ping destination IP address cannot be used to check whether the remote device is reachable. Run the ping -vpn-instance command to configure the AR to send ICMP Echo Request packets to the remote device in the specified VPN instance. If the AR can receive ICMP Echo Reply packets from the remote device, the route to the remote device is reachable. For example: ping -vpn-instance vpn1 10.1.1.3 //Check whether the host at 10.1.1.3 on private network vpn1 is reachable. Scenario 4: When a network is unstable, run the ping -c count -t timeout host command to check the quality of the network between local and remote devices. You can evaluate the network quality by analyzing the packet loss ratio and average delay. On the network with low reliability, use large values of the packet transmission count (-c) and timeout (-t) to achieve accurate detection information. For example: ping -c 8 -t 4000 10.1.1.4 //Check whether the host at 10.1.1.4 is reachable, set the packet transmission count to 8, and set the timeout interval to 4000 ms. Scenario 5: Check the path. Run the ping -r host command to check path information between local and remote devices. For example: ping -r 192.168.108.107 Scenario 6: Check the MTU. Run the ping -f -s command to configure non-fragmentation of ICMP packets and set the size of ICMP packets to obtain the MTU after multiple detection. For example: ping -f -s 1420 192.168.108.107

License introduction
se introduction: After purchasing a product, you can only use basic functions of the product. To use premium features or expand resource capacity, you need to purchase licenses for the features or resources.

License-related concepts: - License: authorizes you to use product software functions by feature, version, capacity, or validity period. A license contains a license file and a license authorization certificate.

- License file: controls the capacity, functions, and validity period of a software version. It is generated by a dedicated encryption tool based on a contract signed with Huawei and delivered as an electronic file with the name extension .dat.

- License authorization certificate: declares your ownership of a Huawei product's license. It contains the product name, License Authorization Code (LAC), and customer name. A license authorization certificate is a PDF document.

- License activation code: is also called activation ID. It is obtained from a license authorization certificate. Each license file matches an activation ID, which is the unique identifier of a license.

- ESDP: is Huawei's license management system that generates, distributes, and manages licenses based on order or application information. The URL of ESDP is https://app.huawei.com/isdp/.


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