Hardware parameters of S series switches

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For the hardware description of the S5700, see S5700 Hardware Description.
For the hardware description of the S6700, see S6700 Hardware Description.
For the hardware description of the S600, see S600 Hardware Description.
For the hardware description of the S9300 and S9300E, see S9300&S9300E Hardware Description.
For the hardware description of the S7700, see S7700 Hardware Description.
For the hardware description of the S9700, see S9700 Hardware Description.
For the hardware description of the S12700, see S12700 Hardware Description.

Other related questions:
PoE power module of an S series switch
Configuration and power of PoE power modules on S series switches are as follows: The fixed series switches that have PWR or PWH in their names support PoE. 1. You can use Hardware Query Tool to query the configuration and power of PoE power modules on S series switches. 2. Among modular switches (S7700, S9700, S9300, and S12700), only the S7700 and S9300 support the PoE function. If a switch is running V200R006 or a later version, it allows 800 W AC, 2200 W AC, and 2200 W DC power modules in PoE power slots. If the input voltage is 220 V AC, the PoE power is 800 W or 2200 W. If the input voltage is 110 V AC, the PoE power is 400 W or 1100 W (the S7712 and S9312 do not support 110 V AC). Only ES0D0G48VA00 cards of the S7700 and LE0DG48VEA00 cards of the S9300 support the PoE function. Dual power modules with the same power can be installed to provide power for PDs in load balancing mode. The total power is the sum of two power modules. The number of PoE interfaces supported by a switch is the result of dividing the available PoE power by 15.4 W (802.3af), 30 W (802.3at), or 60 W (802.3bt). Generally, a 250 W power module supports eight interfaces of 15.4 W. A 500 W power module supports 24 interfaces of 15.4 W and 12 interfaces of 30 W. For details, see Tell You About PoE.

Delete DNS parameters on S series switch
If an S series switch (except an S1700 switch) delivers the DNS server IP address to clients through DHCP, the DNS server IP address can be deleted using commands. For example, if the DNS server IP address 10.1.1.1/24 has been configured on a switch, you can delete it as follows: - If the original configuration is based on a global address pool: [Huawei] ip pool pool1 [Huawei-ip-pool-pool1] undo dns-list 10.1.1.1 //Delete the DNS server IP address. - If the original configuration is based on an interface address pool: [Huawei] interface vlanif 10 //Enter the view of the DHCP server interface connected to clients. [Huawei-Vlanif10] undo dhcp server dns-list 10.1.1.1 //Delete the DNS server IP address. - If the original configuration is based on a DHCP Option template: [Huawei] dhcp option template temp1 [Huawei-dhcp-option-template-temp1] undo dns-list 10.1.1.1 //Delete the DNS server IP address. Additionally, clients need to release their original IP addresses and apply for new IP addresses from the DHCP server.

IGMP snooping parameters of an S series switch
The following IGMP snooping parameters are provided: - Query-interval: specifies the interval for sending General Query messages. The system starts an aging timer for a member port when the port receives a Report message. The aging time is calculated using the following formula: Aging time = Robust variable x Query interval + Maximum response time for General Query messages On the S series modular switch, the default value is 60s. On S and E series fixed switches excluding the S1700, the default value is 125s. - Max-response-time: specifies the maximum response time for a Query message. After receiving a Query message, a device must send a response message within the specified time. The device may send the Report message at any time before the maximum response time expires. The default interval is 10s. - Robust-count: specifies the IGMP robustness variable. This parameter is set based on the link performance. If a link is unstable and many packets are discarded, increase the robustness variable. The default robustness variable is 2. - Last-member-query-interval: specifies the interval for sending Last Member Query messages. In IGMPv2 and IGMPv3, the system starts an aging timer for a member port when the port receives a Leave message. The aging time is calculated using the following formula: Aging time = Robust variable x Interval for sending Last Member Query messages The default interval is 1s. If the IGMP snooping querier is not configured, the parameter is used to calculate the aging time of member ports. - After a member port receives a Report message from the downstream host, the aging time is as follows: Aging time = Robust variable x Query interval + Maximum response time for General Query messages - After a member port receives a Leave message from the downstream host, the aging time is as follows: Aging time = Robust variable x Interval for sending Last Member Query messages Run the display igmp-snooping command to check parameter settings on an S series switch excluding the S1700.

How to configure CAR parameters for S series switches
When the S-series switch (except the S1700) is configured with a speed limit, you need to configure parameters such as cir cir-value and cbs cbs-value, where cir cir-value is the guaranteed rate of information, that is, the average rate that can be guaranteed. Cbs cbs-value means Commit burst size, that is, instantly through the promised burst traffic. For example, if you want to configure a speed limit of 4 Mbit / s, configure cir-value = 4 * 1024 kbit / s = 4096 kbit / s. Cbs-value is configured to be 100-200 times the cir-value. If the user does not configure cbs-value, the device will automatically specify it as the default.

Netbios parameter settings on S series switch
When S series switches (except S1700 switches) function as DHCP servers, they can deliver NetBIOS service parameters to clients through DHCP. The configuration process is as follows: - Interface address pool: [HUAWEI] interface vlanif 10 [HUAWEI-Vlanif10] ip address 10.10.10.1 24 [HUAWEI-Vlanif10] dhcp select interface [HUAWEI-Vlanif10] dhcp server nbns-list 10.10.1.1 //Configure the NetBIOS server address. [HUAWEI-Vlanif10] dhcp server netbios-type p-node //Configure the NetBIOS node type. - Global address pool: [HUAWEI] ip pool pool1 [HUAWEI-ip-pool-pool1] nbns-list 10.10.1.1 //Configure the NetBIOS server address. [HUAWEI-ip-pool-pool1] netbios-type p-node //Configure the NetBIOS node type. - Using a DHCP Option template: [HUAWEI] dhcp option template template1 [HUAWEI-dhcp-option-template-template1] nbns-list 10.10.1.1 //Configure the NetBIOS server address. [HUAWEI-dhcp-option-template-template1] netbios-type p-node //Configure the NetBIOS node type.

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