Basic Vlag Configuration - Lenovo Flex System Fabric CN4093 Application Manual

Basic VLAG Configuration

Configure the ISL
1. Configure STP if required. Use PVRST or MSTP mode only:
2. Configure the ISL ports and place them into a portchannel (dynamic or static):
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Figure 18 shows an example configuration where two VLAG peers are used for
aggregating traffic from downstream devices.
Figure 18. Basic VLAGs
VLAG Peer 1
Mgmt IP: 10.10.10.1/24
VLAG 1
LACP 1000
VLAN 100
Client Switch
In this example, each client switch is connected to both VLAG peers. On each client
switch, the ports connecting to the VLAG peers are configured as a dynamic LACP
port trunk. The VLAG peer switches share a dedicated ISL for synchronizing
VLAG information. On the individual VLAG peers, each port leading to a specific
client switch (and part of the client switch's port trunk) is configured as a VLAG.
In the following example configuration, only the configuration for VLAG 1 on
VLAG Peer 1 is shown. VLAG Peer 2 and all other VLAGs are configured in a
similar fashion.
The ISL connecting the VLAG peers is shared by all their VLAGs. The ISL needs to
be configured only once on each VLAG peer.
CN4093(config)# spanning­tree mode pvrst
CN4093(config)# interface port 1­2
CN4093(config­if)# switchport mode trunk
CN4093(config­if)# lacp mode active
CN4093(config­if)# lacp key 200
CN4093(config­if)# exit
CN4093(config)# vlag isl adminkey 200
ISL
1 2
2 3
LACP 200
8 9 VLAN 4094 7
Chapter 12: Virtual Link Aggregation Groups
VLAG Peer 2
Mgmt IP: 10.10.10.2/24
8
VLAG 2
LACP 2000
VLAN 100
Client Switch
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