User Guide
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2) By default, after negotiation, LACP aggregation group 5 contains port 1 and port 3. Then, on the LACP
protocol interface, group ID 5 will be only displayed on port 1 and port 3.
3) Set Switch A’s system priority (on the LACP protocol interface) to a value which is smaller than 32768
so that switch A’s priority is higher than switch B’s. At the same time, set port 2’s LACP priority on switch
A to a value which is smaller than 32768 so that port 2’s priority is higher than port 1’s. Then view the
negotiation result of LACP aggregation group 5: Group ID on port 2 and port 4 displays 5, i.e. after
negotiation, LACP aggregation group 5 will contain port 2 and port 4.
4) Set Switch A’s system priority (on the LACP protocol interface) to a value which is greater than 32768
so that switch B’s priority is higher than switch A’s. At the same time, set port 1’s LACP priority on switch
B to a value which is smaller than 32768 so that port 1’s priority is higher than port 2’s. Then view the
negotiation result of LACP aggregation group 5: Group ID on port 1 and port 3 displays 5, i.e. after
negotiation, LACP aggregation group 5 will contain port 1 and port 3.
Port configuration considerations in link aggregation
To share egress/ingress traffic load, member ports in an aggregation group must be set to the same
configurations with respect to STP, port priorities, VLAN, port management, ARP attack defense, etc.
Consistent STP Configurations: Includes STP status, P2P port, edge port, port priority, path cost,
etc.
Consistent port priorities.
Consistent VLAN Configurations: Includes interface type, PVID, allowed VLAN and Untag/Tag
VLAN.
Consistent port priorities: Includes Jumbo frame, flow control and isolation settings.
Consistent ACL configurations: Includes Binding ACL lists
Consistent ARP attack defense: Includes ARP rate limit and ARP receiving rate settings.
If parameters on any port are changed in the aggregation group, configurations on other member ports
should be kept consistent.
For ports having joined in the aggregation group, following configurations are not allowed:
Adding static MAC address
Configuring MAC learning
Enabling IP filter
Configuring mirroring destination port
Enabling voice VLAN feature
Enabling 802.1X authentication
Below ports cannot join the aggregation group:
802.1x-enabled port(s)
ACL Binding port(s)
Mirroring destination port(s)
Ports on which MAC address filter is enabled
Ports on which IP address filter is enabled
Ports on which MAC address learning limit is set
4.3 VLAN Management
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