ZyXEL Communications XGS-4526 User Manual

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Chapter 17 Link Aggregation
XGS-4526/4528F/4728F User’s Guide
178
When you enable LACP link aggregation on a port, the port can automatically 
negotiate with the ports at the remote end of a link to establish trunk groups. 
LACP also allows port redundancy, that is, if an operational port fails, then one of 
the “standby” ports become operational without user intervention. Please note 
that: 
• You must connect all ports point-to-point to the same Ethernet switch and 
configure the ports for LACP trunking.
• LACP only works on full-duplex links. 
• All ports in the same trunk group must have the same media type, speed, 
duplex mode and flow control settings. 
Configure trunk groups or LACP before you connect the Ethernet switch to avoid 
causing network topology loops.
17.2.1  Link Aggregation ID 
LACP aggregation ID consists of the following information
1
:        
Table 39   Link Aggregation ID: Local Switch
SYSTEM 
PRIORITY
MAC ADDRESS
KEY
PORT 
PRIORITY
PORT 
NUMBER
0000
00-00-00-00-00-00
0000
00
0000
Table 40   Link Aggregation ID: Peer Switch
SYSTEM 
PRIORITY
MAC ADDRESS
KEY
PORT 
PRIORITY
PORT 
NUMBER
0000
00-00-00-00-00-00
0000
00
0000
1.
Port Priority and Port Number are 0 as it is the aggregator ID for the trunk group, not the individual port.