Quidway S1700 Series Ethernet Switches
Web User Manual 4 Interface Configuration
Issue 01 (2011-11-17) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd
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You can create multiple links between devices that work as one virtual, aggregate link. A port
trunk offers a dramatic increase in bandwidth for network segments where bottlenecks exist,
as well as providing a faulttolerant link between two devices. You can create up to 12 trunks
at a time on the switch.
The switch supports both static trunking and dynamic Link Aggregation Control Protocol
(LACP). Static trunks have to be manually configured at both ends of the link, and the
switches must comply with the Cisco EtherChannel standard. On the other hand, LACP
configured ports can automatically negotiate a trunked link with LACP-configured ports on
another device. You can configure any number of ports on the switch as LACP, as long as they
are not already configured as part of a static trunk. If ports on another device are also
configured as LACP, the switch and the other device will negotiate a trunk link between them.
If an LACP trunk consists of more than eight ports, all other ports will be placed in standby
mode. Should one link in the trunk fail, one of the standby ports will automatically be
activated to replace it.
Besides balancing the load across each port in the trunk, the other ports provide redundancy
by taking over the load if a port in the trunk fails. However, before making any physical
connections between devices, use the web interface or CLI to specify the trunk on the devices
at both ends. When using a port trunk, take note of the following points:
z
Finish configuring port trunks before you connect the corresponding network cables
between switches to avoid creating a loop.
z
You can create up to 12 trunks on a switch, with up to eight ports per trunk.
z
The ports at both ends of a connection must be configured as trunk ports.
z
When configuring static trunks on switches of different types, they must be compatible
with the Cisco EtherChannel standard.
z
The ports at both ends of a trunk must be configured in an identical manner, including
communication mode (i.e., speed, duplex mode and flow control), VLAN assignments,
and CoS settings.
z
Any of the Gigabit ports on the front panel can be trunked together, including ports of
different media types.
z
All the ports in a trunk have to be treated as a whole when moved from/to, added or
deleted from a VLAN.
z
STP, VLAN, and IGMP settings can only be made for the entire trunk.
4.2.1 Configuring System Priority
Use the Interface > Trunk > System Priority page to config system priority of Static Trunk.
Figure 4-8 Configure System Priority
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