Huawei Switch

How to choose a PoE switch?

Hello everyone, This blog describes PoE switches in detail and will give you an overview of how to choose a PoE switch.   Power Supply Standards The power supply standards for PoE switches are classified as PoE (IEEE 802.3af), PoE+ (IEEE 802.3at) and PoE++ (IEEE 802.3bt). Here list some PoE switch for example: ...

PoE vs PoE+ vs PoE++

Hello everyone, PoE (Power over Ethernet) refers to supplying power through an Ethernet network, also known as a local area network-based power supply system PoL (Power over LAN) or Active Ethernet. The PoE system supports three standards: 802.3af (PoE), 802.3at (PoE+), and 802.3bt (PoE++).   What is a PoE switch? In 2003, IEEE...

Switches Stacking Issue

Issue Description S5720 access switches stack issue   Switch 1 is connected with switch 2 on 2 *10G Ports. Switch 1 Port XGE0/0/3 and XGE0/0/4 are connected with Switch 2 XGE1/0/3 and XGE 1/0/4. When we connected the stack cable it shows the logic ports should not same error and stacking Failed. Alarm...

CE12804 Switch Power Module Alarms

Issue Description Run the display device command on the CE12804 switch. The command output shows that the power module is abnormal. Run the display alarm command. The error code of the power module alarm is as follows: A power module experienced a complete 06:39:42 failure Alarm Information A power module experienced a...

Differences Between managed and unmanaged switches

Hello everyone, Switches, as one of the important components of the network, are classified into manageable switches and non-manageable switches according to the management type. So, what is the difference between a non-manageable switch and a manageable switch? Today we will talk about this topic.   Unmanaged Switches The non-Manageable switch is a...

CE12804S 40G Port not coming UP

Issue Description Port was not coming UP when connected 40G from CE12804S to CE6800. SFP model used for connection : - Part : - 02311PUU Model : -  QSFP-40G-SDLC-PAM Alarm Information * port not showing UP in display interface brief * also display transceiver verbose we see no RX Power. Handling Process for troubleshooting we tested local Loop on CE6800 and CE12804S as below 1. CE6800 <---- 40G Fiber ----- >  CE6800              || UP successful 2. CE12804S <---- 40G Fiber ----- >  CE12804S         || NOT UP  from above test cable and SFP is fine. seems issue on CE12804S   on CE12804S from display alarm and display logbuffer we can see resource-mismatch error for all interface. Solution reset the Card where the error has occurred. after reset port was up and working fine.

Importance of Route-tag in OSPF using VPN-instance

Issue Description S6720-30C-EI-24S-AC / V200R008C00SPC500 The problem is that all the external routes (imported/redistributed) are in LSDB of S6720 but not installed in vpn-instance routing table. We configured OSPF in VPN-instance between the 2 switches. On LSW2 we configured a static-route to null0 interface and imported in OSPF. Here is the LSDB and routing table...

OSPF Neighbor Relationship Flapping Caused by an Unstable Link

Issue Description   Applicable Products and Versions: In this example, the switches support Open Shortest Path First (OSPF). Table 4-1 describes the versions and products that support OSPF. Table 4-1 Product and version support for OSPF Networking: As shown in Figure 4-1, the switch directly connects to the NE40E. A VLANIF interface on the switch...