Configuring Ieee 802.3X Flow Control - Cisco 7604 Configuration Manual

Chapter 9 Configuring Interfaces
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This example shows how to configure the MTU size on Gigabit Ethernet port 1/2:
Router# configure terminal
Router(config)# interface gigabitethernet 1/2
Router(config-if)# mtu 9216
Router(config-if)# end
This example shows how to verify the configuration:
Router# show interface gigabitethernet 1/2
GigabitEthernet1/2 is administratively down, line protocol is down
Hardware is C6k 1000Mb 802.3, address is 0030.9629.9f88 (bia 0030.9629.9f88)
MTU 9216 bytes, BW 1000000 Kbit, DLY 10 usec,
<...Output Truncated...>
Router#
Configuring the Global Egress LAN Port MTU Size
To configure the global egress LAN port MTU size, perform this task:
Command
Step 1
Router(config)# system jumbomtu mtu_size
Router(config)# no system jumbomtu
Step 2
Router(config)# end

Configuring IEEE 802.3x Flow Control

Gigabit Ethernet and 10-Gigabit Ethernet ports on the Cisco 7600 series routers use flow control to stop
the transmission of frames to the port for a specified time; other Ethernet ports use flow control to
respond to flow-control requests.
If a Gigabit Ethernet or 10-Gigabit Ethernet port receive buffer becomes full, the port transmits an
IEEE 802.3x pause frame that requests remote ports to delay sending frames for a specified time. All
Ethernet ports (10 Gbps, 1 Gbps, 100 Mbps, and 10 Mbps) can receive and respond to IEEE 802.3x
pause frames from other devices.
To configure flow control on an Ethernet port, perform this task:
Command
Step 1
Router(config)# interface type
Step 2
Router(config-if)# flowcontrol {receive | send}
{desired | off | on}
Router(config-if)# no flowcontrol {receive |
send}
Step 3
Router# show interfaces [ type
flowcontrol
1. type = ethernet, fastethernet, gigabitethernet, or tengigabitethernet
OL-4266-08
For VLAN interfaces and Layer 3 Ethernet ports, supported MTU values are from 64 to 9216 bytes.
For Layer 2 Ethernet ports, you can configure only the global egress LAN port MTU size (see the
"Configuring the Global Egress LAN Port MTU Size" section on page
1
slot/port
1
slot/port ]
Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX
Configuring Optional Interface Features
Purpose
Configures the global egress LAN port MTU size.
Reverts to the default global egress LAN port MTU size
(9216 bytes).
Exits configuration mode.
Purpose
Selects the port to configure.
Configures a port to send or respond to pause frames.
Reverts to the default flow control settings.
Displays the flow-control configuration for all ports.
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