Port Configuration
3-65
3
-Sym (Gigabit only) - Check this item to transmit and receive pause frames, or
clear it to auto-negotiate the sender and receiver for asymmetr ic pause frames.
(The current switch chip only supports symmetric pause frames.)
-FC - Supports flow control
Flow control can eliminate frame loss by “blocking” traffic from end stations or
segments connected directly to the switch when its buffers fill. When en abled,
back pressure is used for half-duplex operation and IEEE 802.3x for full-duplex
operation. (Avoid using flow control on a port connected to a hub unless it is
actually required to solve a problem. Otherwise back pressure jamming signals
may degrade overall performance for the segment attached to the hub.)
(Default: Autonegotiation enabled; Advertised capabilities for 100BASE-T X –
10half, 10full, 100half, 100full; 1000BASE-T – 10half, 10full, 100half, 100full,
1000full; 1000BASE-SX/LX/LH – 1000full)
•Trunk – Indicates if a port is a member of a trunk. To create trunks and select port
members, see “Creating Trunk Groups” on page 3-66.
Note: Auto-negotiation must be disabled before you can configure or force the interface
to use the Speed/Duplex Mode or Flow Control options.
Web – Click Port, Port Configuration or Trunk Configuration. Modify the required
interface settings, and click Apply.
Figure 3-40. Port/Trunk Configuration
CLI – Select the interface, and then enter the required settings.
Console(config)#interface ethernet 1/13 4-104
Console(config-if)#description RD SW#13 4-105
Console(config-if)#shutdown 4-109
.
Console(config-if)#no shutdown
Console(config-if)#no negotiation 4-106
Console(config-if)#speed-duplex 100half 4-105
Console(config-if)#flowcontrol 4-108
.
Console(config-if)#negotiation
Console(config-if)#capabilities 100half 4-107
Console(config-if)#capabilities 100full
Console(config-if)#capabilities flowcontrol