Brocade FastIron Ethernet Switch Administration Guide - Manual (Page 67)

NOTE
The port up/down time is required only for physical ports and not for loopback/ ve/ tunnel ports.
Issuing the show interface command with the appropriate parameters on a FSX device displays the
following output:
device# show interface ethernet 18/1
GigabitEthernet18/1 is up, line protocol is up
Port up for 50 seconds
Hardware is GigabitEthernet, address is 0000.0028.0600 (bia 0000.0028.0798)
Configured speed auto, actual 1Gbit, configured duplex fdx, actual fdx
Configured mdi mode AUTO, actual MDIX
Member of 4 L2 VLANs, port is tagged, port state is FORWARDING
BPDU guard is Disabled, ROOT protect is Disabled
Link Error Dampening is Disabled
STP configured to ON, priority is level0, flow control enabled
Flow Control is config enabled, oper enabled, negotiation disabled
mirror disabled, monitor disabled
Not member of any active trunks
Not member of any configured trunks
No port name
IPG MII 96 bits-time, IPG GMII 96 bits-time
IP MTU 1500 bytes, encapsulation ethernet
300 second input rate: 0 bits/sec, 0 packets/sec, 0.00% utilization
300 second output rate: 848 bits/sec, 0 packets/sec, 0.00% utilization
0 packets input, 0 bytes, 0 no buffer
Received 0 broadcasts, 0 multicasts, 0 unicasts
0 input errors, 0 CRC, 0 frame, 0 ignored
0 runts, 0 giants
10251 packets output, 1526444 bytes, 0 underruns
Transmitted 1929 broadcasts, 8293 multicasts, 29 unicasts
0 output errors, 0 collisions
The line highlighted in bold will resemble one of the following, depending on the configuration:
• If flow control negotiation is enabled (and a neighbor advertises "Pause-Not Capable"), the display
shows:
Flow Control is config enabled, oper disabled, negotiation enabled
• If flow control negotiation is enabled (and a neighbor advertises "Pause-Capable"), the display
shows:
Flow Control is config enabled, oper enabled, negotiation enabled
• If flow control is enabled, and flow control negotiation is disabled, the display shows:
Flow Control is config enabled, oper enabled, negotiation disabled
• If flow control is disabled, the display shows:
Flow control is config disabled, oper disabled
Symmetric flow control on FCX and ICX devices
In addition to asymmetric flow control, FCX and ICX devices support symmetric flow control, meaning
they can both receive and transmit 802.3x PAUSE frames.
By default on FCX devices, packets are dropped from the end of the queue at the egress port (tail drop
mode), when the maximum queue limit is reached. Conversely, when symmetric flow control is enabled,
packets are guaranteed delivery since they are managed at the ingress port and no packets are
dropped.
Symmetric flow control on FCX and ICX devices
FastIron Ethernet Switch Administration Guide 67
53-1003075-02