Chapter 10 Interfaces
ZyWALL/USG Series User’s Guide
336
10.9 LAG
Link Aggregation Group (LAG) is a way to combine multiple physical Ethernet interfaces into a
single logical interface. This increases uplink bandwidth. It also increases availability as even if a
member link goes down, LAG can continue to transmit and receive traffic over the remaining links.
To configure LAG, configure a link number and specify the member ports in the link. All ports must
have the same speed and be in full-duplex mode. You must configure the LAG on both sides of the
link and you must set the interfaces on either side of the link to be the same speed.
At the time of writing, up to 4 ports can be grouped into a LAG and up to 4 LAGs can be configured
on a ZyWALL/USG.
10.9.1 LAG Summary Screen
This screen lists every LAG created on the ZyWALL/USG. To access this screen, click Configuration
> Network > Interface > LAG.
Check Method Select the method that the gateway allows.
Select icmp to have the ZyWALL/USG regularly ping the gateway you specify to make
sure it is still available.
Select tcp to have the ZyWALL/USG regularly perform a TCP handshake with the
gateway you specify to make sure it is still available.
Check Period Enter the number of seconds between connection check attempts.
Check Timeout Enter the number of seconds to wait for a response before the attempt is a failure.
Check Fail
Tolerance
Enter the number of consecutive failures before the ZyWALL/USG stops routing through
the gateway.
Check Default
Gateway
Select this to use the default gateway for the connectivity check.
Check this
address
Select this to specify a domain name or IP address for the connectivity check. Enter
that domain name or IP address in the field next to it.
Check Port This field only displays when you set the Check Method to tcp. Specify the port
number to use for a TCP connectivity check.
Related Setting
Configure WAN
TRUNK
Click WAN TRUNK to go to a screen where you can configure the interface as part of a
WAN trunk for load balancing.
Configure Policy
Route
Click Policy Route to go to the screen where you can manually configure a policy
route to associate traffic with this bridge interface.
OK Click OK to save your changes back to the ZyWALL/USG.
Cancel Click Cancel to exit this screen without saving.
Table 118 Configuration > Network > Interface > Bridge > Add / Edit (continued)
LABEL DESCRIPTION
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