Allied Telesis AT-9900 Series How To Configure - Page 4
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Core 1 (master) configuration
1. Name the switch
2. Create the new VLANs
Create VLANs 2 and 3 for the LANs off distribution switches 2 and 3. The LAN off
distribution switch 1 will use VLAN 1.
3. Configure STP
STP is necessary because each distribution switch forms a loop with the two core switches.
By default, all VLANs belong to the default STP, so we do not need to add VLANs to the STP.
4. Add ports to the VLANs as tagged ports
5. Stop all ports from being untagged ports in VLAN 1
6. Aggregate ports 23-24
The amount of traffic going across the inter-core link depends on the load balancing process
being used by the servers. If they use teaming NICs, and some traffic goes via the NIC that is
connected to the VRRP backup, then that traffic will go from the server to the backup switch
to the master switch to the client (and vice versa). In these circumstances, a lot of traffic
could pass between the master and backup switches, so that link needs to be an aggregated
set of ports.
Page 4 | AlliedWare™ OS How To Note: VRRP
set system name=master
create vlan=vlan2 vid=2
create vlan=vlan3 vid=3
...
enable stp=default
set stp=default priority=8192 mode=rapid
set vlan=1 port=1,23-24 frame=tagged
add vlan=2 port=2,23-24 frame=tagged
add vlan=3 port=3,23-24 frame=tagged
...
delete vlan=1 port=1-24
create switch trunk=example port=23-24
Core 1 (master) configuration