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Why the Huawei S2700 switch cannot transparently transmit the packets whose VLANID is greater than 127 after VLAN translation is enabled?

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Take the Huawei S2700-9TP-SI-AC for example:
After the VLAN translation function is enabled for the Huawei S2700 switch, the 128 module problem exists because the chip difference supports only 128 VLAN TO VLAN entries.
The packets received through the port are processed as the VLAN smaller than 128. The calculation method is (vlanid)%128.
Therefore, for a VLAN greater than 128, port vlan-mapping vlan id map-vlan id, that is, the mapping from the VLAN to the same VLAN, must be configured for the transparent transmission to be implemented.
More related:
Huawei S2700-9TP-EI-AC
Huawei S2700-9TP-EI-DC
Huawei S2700-9TP-PWR-EI

Posted on May 11, 2017

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How to Configure the Traffic Statistics Function on S2700&S3700&S5700?


Assume that the statistics on ping packets from 10.1.1.0/24 need to be collected on the interface Ethernet0/0/1 or GigabitEthernet0/0/1. The configuration is as follows:
# Configuration the acl rule.
[HUAWEI] acl number 3333 [HUAWEI-acl-adv-3333] rule 5 permit icmp source 10.1.1.0 0.0.0.255 [HUAWEI-acl-adv-3333] quit # Configuration the traffic classifier.
[HUAWEI] traffic classifier test [HUAWEI-classifier-test] if-match acl 3333 [HUAWEI-classifier-test] quit
# Configuration the traffic behavior:
[HUAWEI] <strong>traffic behavior test</strong> [HUAWEI-behavior-test] <strong>statistic enable</strong> [HUAWEI-behavior-test] <strong>quit</strong>
# Configuration the traffic policy.
[HUAWEI] traffic policy test [HUAWEI-trafficpolicy-test] classifier test behavior test [HUAWEI-trafficpolicy-test] quit # Apply the traffic policy:
  • # Apply the traffic policy test to the S2700 or S3700. [HUAWEI] <strong>interface ethernet0/0/1</strong> [HUAWEI-Ethernet0/0/1] <strong>traffic-policy test inbound</strong>
  • # Apply the traffic policy test to the S5700. [HUAWEI] <strong>interface gigabitethernet0/0/1</strong> [HUAWEI-GigabitEthernet0/0/1] <strong>traffic-policy test inbound</strong>

After the configuration, run the display traffic policy statistics interface interface-type interface-number command to view the traffic statistics. To re-collect traffic statistics, run the reset traffic policy statistics interface interface-type interface-number command to clear existing traffic statistics first.
NOTE:
  • The S2700 or S3700 can collect statistics only on incoming packets.
  • The S5700 can collect statistics on incoming and outgoing packets, but cannot collect statistics on packets sent from its own CPU.
S5700 Switch Thunder link com

Feb 06, 2017 | The Computers & Internet

1 Answer

What Are the Differences in AP-side Switch Interface Configuration and Intermediate Switch Configuration in Direct and Tunnel Forwarding Modes?


Differences in configuration on switch interfaces connected to APs are as follows:

In tunnel forwarding mode, interfaces connected to APs transparently transmit only packets of the management VLAN. These interfaces must be added to the management VLAN in untagged mode. In direct forwarding mode, interfaces connected to APs must be trunk or hybrid interfaces. These interfaces must be added to the management VLAN in untagged mode and added to service VLANs in tagged mode. If a trunk interface is connected to an AP, the PVID of the interface must be set to the management VLAN ID.


Differences in configuration on intermediate switches are as follows:

In tunnel forwarding mode, intermediate switches transparently transmit only packets of the management VLAN. In direct forwarding mode, intermediate switches transparently transmit packets of both the management VLAN and service VLANs.
S5700 Switch Thunder link com

Oct 17, 2016 | The Office Equipment & Supplies

1 Answer

Can the S2700 Switch Function as a Gateway?


The S2700 switch cannot be used as a gateway. The S2700 is a Layer 2 switch. If it is used as a gateway, it sends all packets that need to be forwarded at Layer 3 to the CPU to forward the packets through software. This causes a high CPU usage. Because CAR parameters are configured to protect the CPU, a large number of packets are dropped, affecting forwarding of service packets.

Aug 08, 2016 | Computers & Internet

1 Answer

How to Enable a Switch to Transparently Transmit BPDUs That Are Discarded by Default?


You can enable a switch to transparently transmit BPDUs in the following modes:
1. Run the bpdu bridge enable command to enable the port bridge function. Then the switch can transparently transmit all BPDUs.
2. Globally specify the group MAC address of BPDU for the inbound and outbound ports of two edge switches on the network, and enable the L2PT transparent transmission function of the protocol for the ports.
Incoming BPDUs are replaced with the group MAC address, converted to data packets, and forwarded in the VLAN. Configure the L2PT function in the outbound port to replace the group MAC address with the BPDU MAC address.

Jul 11, 2016 | Computers & Internet

2 Answers

What is the difference between Huawei 2700 switch and 2300 switch?


Huawei S2700 target the enterprise market, S2300 target at telecom market, but most function are the same, the manufacturer did this mostly for marketing reasons as the telecom market most are big customers with better discount.

Nov 20, 2015 | Huawei Computers & Internet

1 Answer

How to stop user privately setting up a static IP address?


Huawei S2300/3300/5300 series switch although no H3C switches am user-bind command, but through the DHCP Snooping function can also be realized IP+MAC+ port binding to prevent users set up a static IP address. For example, if the request port Ethernet0/0/1 in addition to the static IP address for the 1.1.1.2, MAC address for the 001c-2309-9aa7 corresponding to the user, all other static IP users can not access the internet. Configuration is as follows:
Configure the device DHCP Snooping
# enable the global DHCP Snooping function.
[Quidway] DHCP snooping enable
# configure user side interface of VLAN.
[Quidway] VLAN 100
[Quidway-vlan100] quit
[Quidway] interface Ethernet 0/0/1
[Quidway-Ethernet0/0/1] port default VLAN 100
[Quidway-Ethernet0/0/1] quit
# enable VLAN DHCP Snooping function.
[Quidway] VLAN 100
[Quidway-vlan100] DHCP snooping enable
# configuration interface for packet inspection at the user side
[Quidway] interface Ethernet 0/0/1
[Quidway-Ethernet0/0/1] DHCP snooping check ARP enable
[Quidway-Ethernet0/0/1] DHCP snooping check IP enable
[Quidway-Ethernet0/0/1] quit
# configuration static binding table entry
[Quidway] VLAN 100
[Quidway-vlan100] DHCP snooping bind-table static IP-address 1.1.1.2 mac-address 001c-2309-9aa7 interface Ethernet 0/0/1

Aug 06, 2015 | Huawei Boxed Ls-s2318tp-ei-ac Quidway...

1 Answer

Do the Huawei S2700/3700/5700/6700 Support the Optical Modules of Other Vendors?


The S2700/3700/5700/6700 can use only the certificated optical modules. If an uncertificated
optical module is used, an error may occur and Huawei is not responsible for it. Huawei Switch Price Buy Huawei Quidway Switches Huanetwork com

Aug 27, 2014 | Huawei Computers & Internet

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