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Cisco ASA 5500 Series Configuration Guide using ASDM
Chapter12 Starting Interface Configuration (ASA 5510 and Higher)
Starting Interface Configuration (ASA 5510 and Higher)
a. For slot 1 on the ASA 5550 ASA or the 4GE SSM, you can choose either RJ-45 or SFP from the
Media Type drop-down list.
RJ-45 is the default.
b. To set the duplex for RJ-45 interfaces, choose Full or Auto, depending on the interface type, from
the Duplex drop-down list. Half is not supported for the EtherChannel.
c. To set the speed, choose a value from the Speed drop-down list.
The speeds available depend on the interface type. For SFP interfaces, you can set the speed to
Negotiate or Nonegotiate. Negotiate (the default) enables link negotiation, which exchanges
flow-control parameters and remote fault information. Nonegotiate does not negotiate link
parameters. For RJ-45 interfaces on the ASA 5500 series ASA, the default auto-negotiation setting
also includes the Auto-MDI/MDIX feature. See the “Auto-MDI/MDIX Feature” section on
page 12-2.
d. To enable pause (XOFF) frames for flow control on 1-Gigabit and 10-Gigabit Ethernet interfaces,
check the Enable Pause Frame check box.
If you have a traffic burst, dropped packets can occur if the burst exceeds the buffering capacity of
the FIFO buffer on the NIC and the receive ring buffers. Enabling pause frames for flow control can
alleviate this issue. Pause (XOFF) and XON frames are generated automatically by the NIC
hardware based on the FIFO buffer usage. A pause frame is sent when the buffer usage exceeds the
High Watermark. The default value is 128 KB; you can set it between 0 and 511. After a pause is
sent, an XON frame can be sent when the buffer usage is reduced below the Low Watermark. By
default, the value is 64 KB; you can set it between 0 and 511. The link partner can resume traffic
after receiving an XON, or after the XOFF expires, as controlled by the Pause Time value in the
pause frame. The default value is 26624; you can set it between 0 and 65535. If the buffer usage is
consistently above the High Watermark, pause frames are sent repeatedly, controlled by the pause
refresh threshold value.
To change the default values for the Low Watermark, High Watermark, and Pause Time, uncheck
the Use Default Values check box.
Note Only flow control frames defined in 802.3x are supported. Priority-based flow control is not
supported.
e. Click OK to accept the Hardware Properties changes.
Step4 To customize the EtherChannel, click the Advanced tab.