Command Line Reference Guide

Interfaces | 453
• The only configuration applicable to half duplex ports is rx off tx off. The following error is
returned:
Can’t configure flowcontrol when half duplex is configure,
config ignored
• Half duplex cannot be configured when the flow control configuration is on (default is rx on tx
on
). The following error is returned:
Can’t configure half duplex when flowcontrol is on, config
ignored
• Speeds less than 1 Gig cannot be configured when the asymmetric flow control configuration is
on. The following error is returned:
Can’t configure speed <1G when Asymmetric flowcontrol is on,
config ignored
• FTOS only supports rx on tx on and rx off tx off for speeds less than 1 Gig (Symmetric).
• On the C-Series and S-Series systems, the flow-control sender and receiver must be on the same
port-pipe. Flow control is not supported across different port-pipes on the C-Series or S-Series
system.
Example
Figure 15-4. show running config (partial)
The table below displays how FTOS negotiates the flow control values between two Dell Force10
chassis connected back-to-back using 1G copper ports.
Note: The flow control must be off (rx off tx off) before configuring the half duplex.
Force10(conf-if-gi-0/1)#show config
!
interface GigabitEthernet 0/1
no ip address
switchport
no negotiation auto
flowcontrol rx off tx on
no shutdown
...
Table 15-1. Negotiated Flow Control Values
Configured Negotiated
LocRxConf LocTxConf RemoteRxConf RemoteTxConf LocNegRx LocNegTx RemNegRx RemNegTx
off off off
off
on
on
off
on
off
on
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off on off
off
on
on
off
on
off
on
off
off
off
off
off
off
on
off
off
off
on
off
off
off
off
off