Enabling/Disabling Flow Control On The Ethernet Port; Setting The Link Type Of The Ethernet Port - 3Com 3C13636 Configuration Manual

3Com Router 3000 Ethernet Family
Configuration Guide

3.2.6 Enabling/Disabling Flow Control on the Ethernet Port

To prevent packet loss, you may enable flow control. When congestion occurs to one of
the two connected routers enabled with flow control, it sends a message asking the
peer to stop packet sending. As requested, the peer pauses until it is allowed to send
packets again.
Perform the following configuration in Ethernet port view.
Table 3-6 Enable/disable flow control
Enable flow control on the Ethernet port
Disable flow control on the Ethernet port
By default, flow control is disabled on the port.

3.2.7 Setting the Link Type of the Ethernet Port

The link type of an Ethernet port can be access, hybrid, or trunk.
Access ports are intended for connecting PCs and they can be assigned to one VLAN
only.
Trunk ports are intended for connecting routers and they can be assigned to multiple
VLANs.
Hybrid ports can connect both routers and PCs and they can be assigned to multiple
VLANs.
The last two types of ports are different in that a hybrid port allows the packets from
multiple VLANs to be sent untagged, but a trunk port only allows the packets from the
default VLAN to be sent untagged.
Perform the following configuration in Ethernet port view.
Table 3-7 Set the link type of the Ethernet port
Set the link type of the port to access.
Set the link type of the port to hybrid.
Set the link type of the port to trunk.
Restore the default link type of the port, that is, access.
The default link type of the port is access.
Operation
Operation
3Com Corporation
3-5
Chapter 3 Layer 2 Ethernet Port Configuration
Command
flow-control
undo flow-control
port link-type access
port link-type hybrid
port link-type trunk
undo port link-type
Command