What Is a Reserved VLAN?
A reserved VLAN is used as a channel of the internal control plane of a switch or a channel for transmitting user service data of some features.
By default, the range of reserved VLANs is from 4064 to 4094. Among the reserved VLANs, VLANs 4064 to 4071 are used for port mirroring, and VLAN 4095 is used by the system to forward packets inside a device. Other reserved VLANs are used for function extension in later versions.
In addition, Layer 3 interfaces are available on CE switches and use reserved VLANs for packet forwarding. In most cases, all Layer 3 interfaces share one reserved VLAN. For some switches, such as the CE6855HI, each Layer 3 interface occupies a reserved VLAN.
You can change the reserved VLAN range on a CE switch using the vlan reserved command to ensure that the default reserved VLAN range does not overlap with the planned or existing ones.
The following is a configuration example.
<HUAWEI> system-view [~HUAWEI] vlan reserved 1000
After vlan-id is specified, the VLAN specified by vlan-id to the VLAN specified by vlan-id plus 30 are configured as reserved VLANs. Here, VLANs 1000 to 1030 are configured as reserved VLANs.
