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Interoperation and Replacement Solution 1: Replacement Solution on the Entire Network
Configuration Notes
- This example applies to Huawei switches of V200R005 and later versions.
- On Huawei switches, LNP is used globally and on interfaces by default. The interface that is negotiated as an access interface joins VLAN 1 by default, and the interface that is negotiated as a trunk interface joins all VLANs by default. Generally, you only need to change the VLAN configuration on an interface based on the networking.
Networking Requirements
In Figure 5-1, terminal users are connected to the network through switches. To implement Layer 2 connectivity, configure the link type on each interface and add interfaces to VLANs. If the network scale is large, the configuration is very complex. To simplify configurations, switches are connected through the trunk link, and switches and user terminals are connected through access links and added to VLANs.
Configuration Roadmap
- Enable LNP in the system view and interface view to implement auto-negotiation of the link type of an interface. Because PCs do not support LNP, so switch interfaces connected to terminals are used as access interfaces and interfaces between switches are used as trunk interfaces through negotiation.
- Add interfaces to VLANs to implement Layer 2 connectivity.
Procedure
- Enable global LNP.
By default, global LNP is enabled. If LNP is disabled, run the undo lnp disable command in the system view to enable it.
- Create VLANs.
Huawei switches support two VLAN creation modes:
- Manually create VLANs on switches.
- Create VLANs on Switch3 only and configure VCMP to synchronize VLANs on Switch3 to other switches. If VCMP is used to create VLANs, configure Switch3 as the VCMP server and Switch1 and Switch2 as VCMP clients. For details, see "VCMP Configuration."
The following describes how to manually create VLANs.
# Create VLAN 10 and VLAN 20 on Switch1, Switch2, and Switch3.
<HUAWEI> system-view [HUAWEI] sysname Switch1 [Switch1] vlan batch 10 20
<HUAWEI> system-view [HUAWEI] sysname Switch2 [Switch2] vlan batch 10 20
<HUAWEI> system-view [HUAWEI] sysname Switch3 [Switch3] vlan batch 10 20
- Enable LNP on interfaces, and add switch interfaces connected to PCs to VLANs as access interfaces and interfaces between switches to VLANs as trunk interfaces.
By default, LNP on an interface is enabled. If LNP is disabled, run the undo port negotiation disable command in the interface view to enable it.
# Configure Switch1.
[Switch1] interface GigabitEthernet 0/0/1 [Switch1-GigabitEthernet0/0/1] port default vlan 10 //The interface connected to a PC is an access interface. Run this command to configure the VLAN that the interface joins. [Switch1-GigabitEthernet0/0/1] quit [Switch1] interface GigabitEthernet 0/0/2 [Switch1-GigabitEthernet0/0/2] port trunk allow-pass only-vlan 10 20 //The interface connected to a switch is negotiated as a trunk interface. Run this command to configure the VLANs that the interface joins. This command configures the interface to allow packets from VLAN 10 and VLAN 20. [Switch1-GigabitEthernet0/0/2] quit [Switch1] interface GigabitEthernet 0/0/3 [Switch1-GigabitEthernet0/0/3] port default vlan 20 [Switch1-GigabitEthernet0/0/3] quit
# Configure Switch2.
[Switch2] interface GigabitEthernet 0/0/1 [Switch2-GigabitEthernet0/0/1] port default vlan 10 [Switch2-GigabitEthernet0/0/1] quit [Switch2] interface GigabitEthernet 0/0/2 [Switch2-GigabitEthernet0/0/2] port trunk allow-pass only-vlan 10 20 [Switch2-GigabitEthernet0/0/2] quit [Switch2] interface GigabitEthernet 0/0/3 [Switch2-GigabitEthernet0/0/3] port default vlan 20 [Switch2-GigabitEthernet0/0/3] quit
# Configure Switch3.
[Switch3] interface GigabitEthernet 0/0/1 [Switch3-GigabitEthernet0/0/1] port trunk allow-pass only-vlan 10 20 [Switch3-GigabitEthernet0/0/1] quit [Switch3] interface GigabitEthernet 0/0/2 [Switch3-GigabitEthernet0/0/2] port trunk allow-pass only-vlan 10 20 [Switch3-GigabitEthernet0/0/2] quit
- Verify the configuration.
After the preceding configuration is complete, run the display lnp interface interface-type interface-number command to check auto-negotiation on the specified Layer 2 interface.
[Switch1] display lnp interface gigabitethernet0/0/2 LNP information for GigabitEthernet0/0/2: Port link type: trunk Negotiation mode: desirable Hello timer expiration(s): 7 Negotiation timer expiration(s): 0 Trunk timer expiration(s): 278 FSM state: trunk Packets statistics 56 packets received 0 packets dropped bad version: 0, bad TLV(s): 0, bad port link type: 0, bad negotiation state: 0, other: 0 58 packets output 0 packets dropped other: 0
Run the display lnp summary command to check auto-negotiation information on all interfaces of the Layer 2 device.
[Switch1] display lnp summary Global LNP : Negotiation enable ------------------------------------------------------------------------------- C: Configured; N: Negotiated; *: Negotiation disable; Port link-type(C) link-type(N) InDropped OutDropped FSM ------------------------------------------------------------------------------- GE0/0/1 desirable access 0 0 access GE0/0/2 desirable trunk 0 0 trunk GE0/0/3 desirable access 0 0 access
Configuration Files
Switch1 configuration file
# sysname Switch1 # vlan batch 10 20 # interface GigabitEthernet0/0/1 port default vlan 10 # interface GigabitEthernet0/0/2 port trunk allow-pass only-vlan 10 20 # interface GigabitEthernet0/0/3 port default vlan 20 # return
Switch2 configuration file
# sysname Switch2 # vlan batch 10 20 # interface GigabitEthernet0/0/1 port default vlan 10 # interface GigabitEthernet0/0/2 port trunk allow-pass only-vlan 10 20 # interface GigabitEthernet0/0/3 port default vlan 20 # return
Switch3 configuration file
# sysname Switch3 # vlan batch 10 20 # interface GigabitEthernet0/0/1 port trunk allow-pass only-vlan 10 20 # interface GigabitEthernet0/0/2 port trunk allow-pass only-vlan 10 20 # return