H3C S7500 Series Operation Manual page 134

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Operation Manual – Extended VLAN Application

H3C S7500 Series Ethernet Switches

# Add port Ethernet 1/0/1 to the isolate-user-VLAN (VLAN 6) and the secondary VLANs

(VLAN 3 and VLAN 4), and configure the port to untag the VLAN packets.

[SwitchC-Ethernet1/0/4] quit

[SwitchC] interface Ethernet 1/0/1

[SwitchC-Ethernet1/0/1] port link-type hybrid

[SwitchC-Ethernet1/0/1] port hybrid vlan 3 untagged

[SwitchC-Ethernet1/0/1] port hybrid vlan 4 untagged

[SwitchC-Ethernet1/0/1] port hybrid vlan 6 untagged

[SwitchC-Ethernet1/0/1] port hybrid pvid vlan 6

# Configure isolate-user-VLAN-to-secondary VLAN mapping.

[SwitchC-Ethernet1/0/1] quit

[SwitchC] isolate-user-vlan 6 secondary 3 to 4

After the above configurations, Switch A can receive packets from Switch B and Switch

C, and they are all packets without VLAN tag. VLAN 3 configured on Switch B and

VLAN 3 configured on Switch C cannot communicate with each other because the

packets from them are untagged before the packets reach Switch A. This makes the

lower switches only own locally valid VLAN configuration. And in this way, the global

VLAN resource is saved.

Chapter 2 Isolate-User-VLAN Configuration

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