Table of Contents

Chapter 1 Ethernet Port Configuration. 1-1

1.1 Ethernet Port Overview. 1-1

1.2 Ethernet Port Configuration. 1-1

1.2.1 Entering Ethernet Port View. 1-2

1.2.2 Enabling/Disabling an Ethernet Port 1-2

1.2.3 Setting Ethernet Port Description. 1-2

1.2.4 Setting the Duplex Attribute of an Ethernet Port 1-2

1.2.5 Setting Speed on the Ethernet Port 1-3

1.2.6 Setting the Cable Type for the Ethernet Port 1-4

1.2.7 Enabling/Disabling Flow Control for the Ethernet Port 1-5

1.2.8 Setting the Interval for Performing Statistics on the Port 1-5

1.2.9 Permitting/Denying Jumbo Frames. 1-6

1.2.10 Setting Broadcast/Multicast Suppression on an Ethernet Port 1-6

1.2.11 Setting the Network Mode of an Ethernet Port 1-7

1.2.12 Setting the Link Type for the Ethernet Port 1-8

1.2.13 Adding the Ethernet Port to Specified VLANs. 1-9

1.2.14 Setting the Default VLAN ID for the Ethernet Port 1-9

1.2.15 Setting the VLAN VPN Feature on a Port 1-10

1.2.16 Enabling/Disabling the VLAN Filtering Function on an Ethernet Port 1-11

1.2.17 Copying Port Configurations to Other Ports. 1-11

1.2.18 Setting the Link-State Hold Time. 1-13

1.2.19 Setting the Ethernet Port in Loopback Mode. 1-14

1.3 Displaying and Maintaining Ethernet Port Configuration. 1-14

1.4 Ethernet Port Configuration Example. 1-15

1.5 Troubleshooting Ethernet Ports. 1-16

 

Chapter 1  Ethernet Port Configuration

When configuring an Ethernet port, go to these sections for information you are interested in:

l           Ethernet Port Overview

l           Ethernet Port Configuration

l           Displaying and Maintaining Ethernet Port Configuration

l           Ethernet Port Configuration Example

l           Troubleshooting Ethernet Ports

1.1  Ethernet Port Overview

The S9500 series can provide conventional Ethernet ports, fast Ethernet ports, 1,000 Mbps Ethernet ports and 10 Gbps Ethernet ports. The configurations of these Ethernet ports are basically the same, which will be described in the following sections.

1.2  Ethernet Port Configuration

Complete the following tasks to configure an Ethernet port:

l           Entering Ethernet Port View

l           Enabling/Disabling an Ethernet Port

l           Setting Ethernet Port Description

l           Setting the Duplex Attribute of an Ethernet Port

l           Setting Speed on the Ethernet Port

l           Setting the Cable Type for the Ethernet Port

l           Enabling/Disabling Flow Control for the Ethernet Port

l           Setting the Interval for Performing Statistics on the Port

l           Permitting/Denying Jumbo Frames

l           Setting Broadcast/Multicast Suppression on an Ethernet Port

l           Setting the Network Mode of an Ethernet Port

l           Setting the Link Type for the Ethernet Port

l           Adding the Ethernet Port to Specified VLANs

l           Setting the Default VLAN ID for the Ethernet Port

l           Setting the VLAN VPN Feature on a Port

l           Enabling/Disabling the VLAN Filtering Function on an Ethernet Port

l           Copying Port Configurations to Other Ports

l           Setting the Link-State Hold Time

l           Setting the Ethernet Port in Loopback Mode

1.2.1  Entering Ethernet Port View

Before configuring an Ethernet port, enter Ethernet port view first.

Perform the following configuration in system view.

To do …	Use the command …
Enter Ethernet port view	interface interface-type interface-number

 

1.2.2  Enabling/Disabling an Ethernet Port

After configuring the related parameters and protocol of the port, you can use undo shutdown command to enable the port. If you do not want a port to forward data any more, use shutdown command to disable it.

Perform the following configuration in Ethernet port view.

To do ...	Use the command …
Disable an Ethernet port	shutdown
Enable an Ethernet port	undo shutdown

 

By default, the port is enabled.

1.2.3  Setting Ethernet Port Description

To distinguish Ethernet ports, you can use the following command to make some necessary descriptions.

Perform the following configuration in Ethernet port view.

To do …	Use the command …
Configure an Ethernet port description	description text
Delete the Ethernet port description	undo description

 

By default, an Ethernet port has no description.

1.2.4  Setting the Duplex Attribute of an Ethernet Port

To configure a port to send and receive data packets at the same time, set it to full-duplex. To configure a port to either send or receive data packets at a time, set it to half-duplex. If the port has been set to auto-negotiation mode, the local and peer ports will automatically negotiate the duplex mode.

Perform the following configuration in Ethernet port view.

To do …	Use the command …
Set duplex attribute for the Ethernet port	duplex { auto | full | half }
Restore the default duplex attribute of the Ethernet port	undo duplex

 

10/100 Mbps electrical Ethernet ports can operate in full-duplex, half-duplex or auto-negotiation mode, so can a 10/100/1,000 Mbps electrical Ethernet port. However, when the port rate is set to 1,000 Mbps or auto, the duplex mode of the port can only be set to full (full duplex) or auto (auto-negotiation). A 100 Mbps/1,000 Mbps optical Ethernet port operates in full duplex mode even if it is configured to operate in the auto-negotiation mode. A 10 Gbps optical Ethernet port can only operate in full duplex mode.

The duplex mode of Ethernet ports defaults to auto (auto-negotiation).

 

 

1.2.5  Setting Speed on the Ethernet Port

You can use the following command to set the speed on the Ethernet port. If the speed is set to auto-negotiation mode, the local and peer ports will automatically negotiate the port speed.

Perform the following configuration in Ethernet port view.

To do …	Use the command …
Set Ethernet port speed	speed { 10 | 100 | 1000 | 10000 | auto }
Restore the default speed on the Ethernet port	undo speed

 

The speed options in the command are available depending on the type and duplex mode of the port. For example, for 10/100/1,000 Mbps electrical ports, 10 Mbps, 100 Mbps, and 1,000 Mbps are available. You can select a proper port speed as needed. However, when the duplex mode is changed to half duplex, the port speed cannot be set to 1,000 Mbps or auto.

The 10/100 Mbps electrical Ethernet port can operate at 10 Mbps, 100 Mbps and in auto mode. You can set it accordingly.

The 10/100/1,000 Mbps electrical Ethernet port can operate at 10 Mbps, 100 Mbps, or 1,000 Mbps. However in half duplex mode, the port cannot operate at 1,000 Mbps or in auto mode. The 100 Mbps optical Ethernet port supports 100 Mbps; the 1,000 Mbps optical Ethernet port supports 1,000 Mbps; a 10 Gbps optical Ethernet port only supports 10 Gbps.

By default, the speed of the port is in auto mode.

 

 

1.2.6  Setting the Cable Type for the Ethernet Port

The Ethernet port supports straight-through and cross-over network cables. The following command can be used for configuring the cable type.

Perform the following configuration in Ethernet port view.

To do …	Use the command …
Set the type of the cable connected to the Ethernet port	mdi { across | auto | normal }
Restore the default type of the cable connected to the Ethernet port	undo mdi

 

 

By default, the cable type is auto (auto-recognized). That is, the system can automatically recognize the type of the cable connecting to the port.

1.2.7  Enabling/Disabling Flow Control for the Ethernet Port

After enabling flow control in both the local and the peer switch, if congestion occurs in the local switch, the switch will inform its peer to pause packet sending. Once the peer switch receives this message, it will pause sending packets to the local switch, and vice versa. In this way, packet loss is reduced effectively. The flow control function of the Ethernet port can be enabled or disabled through the following command.

Perform the following configuration in Ethernet port view.

To do …	Use the command …
Enable Ethernet port flow control	flow-control
Disable Ethernet port flow control	undo flow-control

 

By default, Ethernet port flow control is disabled.

1.2.8  Setting the Interval for Performing Statistics on the Port

Follow these steps to set the interval for performing statistics on the port:

To do …	Use the command …	Remarks
Enter system view	system-view	—
Enter Ethernet port view/POS port view	interface interface-type interface-number	Required The interface-type argument is the Ethernet or POS port type.
Set the interval for performing statistics on the port	flow-interval interval	Required 300 seconds by default

 

1.2.9  Permitting/Denying Jumbo Frames

During large throughput data switching, like in file transmission, a card may encounter jumbo frames larger than the standard Ethernet frame length. You may configure the device to permit them to pass the card or deny them.

Perform the following configuration in system view.

To do …	Use the command …
Enable Jumbo frames to pass the card on a specified slot, and set the maximum length of Jumbo frames allowed to pass the card	jumboframe enable [ jumboframe-value ] slot slot-number
Disable Jumbo frames from passing the card on a specified slot	jumboframe disable slot slot-number

 

By default, jumbo frames are allowed to pass.

 

 

1.2.10  Setting Broadcast/Multicast Suppression on an Ethernet Port

To prevent port congestion resulting from broadcast/multicast packet flooding, the switch supports broadcast/multicast suppression. You can enable broadcast/multicast suppression by setting a suppression triggering speed percentage or bandwidth threshold.

Perform the following configuration in Ethernet port view.

To do …	Use the command …
Configure broadcast suppression on the Ethernet port	broadcast-suppression { ratio | bandwidth bandwidth }
Restore the default setting of broadcast suppression on the Ethernet port	undo broadcast-suppression
Configure multicast suppression on the Ethernet port	multicast-suppression { ratio | bandwidth bandwidth }
Restore the default setting of multicast suppression on the Ethernet port	undo multicast-suppression

 

 

By default, the threshold for broadcast suppression is 50%, while that for multicast suppression is 100%.

1.2.11  Setting the Network Mode of an Ethernet Port

A port in WAN mode is used for connecting to an SDH network, while a port in LAN mode is used for connecting to Ethernet.

Perform the following configuration in Ethernet port view.

To do …	Use the command …
Set the network mode of the Ethernet port	port-mode { wan | lan }
Restore the default network mode	undo port-mode

 

By default, Ethernet ports work in LAN mode. 10-GE Ethernet ports support WAN mode.

 

 

1.2.12  Setting the Link Type for the Ethernet Port

The link type of an Ethernet port can be access, hybrid, or trunk. The access port carries one VLAN only and is used for connecting to the user’s computer. The trunk port can belong to more than one VLAN to receive/send packets for them and is used for connection between switches. The hybrid port can also carry more than one VLAN to receive/send packets for them and is used for connecting both switches and user computers. The difference between the hybrid port and the trunk port is that the hybrid port allows the packets from multiple VLANs to be sent without tags, but the trunk port only allows the packets from the default VLAN to be sent without tags.

Perform the following configuration in Ethernet port view.

To do …	Use the command …
Configure the port as access port	port link-type access
Configure the port as hybrid port	port link-type hybrid
Configure the port as trunk port	port link-type trunk
Restore the default link type, that is, the access port	undo port link-type

 

You can configure three types of ports concurrently on the same switch, but you cannot switch the link type of a port directly between trunk and hybrid. To change the link type of a port from trunk to hybrid or vice versa, you must first set it to access.

The default port type is access.

1.2.13  Adding the Ethernet Port to Specified VLANs

The following commands are used for adding an Ethernet port to a specified VLAN. The access port can only be added to one VLAN, while the hybrid and trunk ports can be added to multiple VLANs.

Perform the following configuration in Ethernet port view.

To do …	Use the command …
Add the current access port to a specified VLAN	port access vlan vlan-id
Add the current hybrid port to specified VLANs	port hybrid vlan vlan-id-list { tagged | untagged }
Add the current trunk port to specified VLANs	port trunk permit vlan { vlan-id-list | all }
Remove the current access port from to a specified VLAN	undo port access vlan
Remove the current hybrid port from to specified VLANs	undo port hybrid vlan vlan-id-list
Remove the current trunk port from specified VLANs	undo port trunk permit vlan { vlan-id-list | all }

 

 

After adding the Ethernet port to specified VLANs, the local port can forward packets of these VLANs. The hybrid and trunk ports can be added to multiple VLANs, thereby implementing the VLAN intercommunication between peers. On a hybrid port, you can configure to tag some VLAN packets so that they can be processed differently.

1.2.14  Setting the Default VLAN ID for the Ethernet Port

Since the access port can only be included in one VLAN, its default VLAN is the one to which it belongs. As the hybrid port and the trunk port can be included in multiple VLANs, it is necessary to assign them a default VLAN ID. Configured with a default VLAN ID, the hybrid or trunk port forwards the packets received without VLAN tags to the default VLAN. If the port receives a packet with the default VLAN tag, it will remove the tag before forwarding the packet.

Perform the following configuration in Ethernet port view.

To do …	Use the command …
Set the default VLAN ID for the hybrid port	port hybrid pvid vlan vlan-id
Set the default VLAN ID for the trunk port	port trunk pvid vlan vlan-id
Restore the default VLAN ID of the hybrid port to the default value	undo port hybrid pvid
Restore the default VLAN ID of the trunk port to the default value	undo port trunk pvid

 

 

The default VLAN on the hybrid or trunk port is VLAN 1 and that on the access port is the VLAN to which it belongs.

1.2.15  Setting the VLAN VPN Feature on a Port

A VLAN Tag consists of 12 bits (defined by IEEE802.1Q), so Ethernet Switches can support up to 4 K VLANs. Yet, this is far from enough for a network like MAN (metropolitan area network), where a large number of VLANs are required to isolate users.

The port VLAN VPN feature allows your switch to tag an originally tagged packet, namely, to mark the packet with another VLAN Tag besides the original one, thus providing VLANs as many as 4 K x 4 K. In addition, the use of dual tags allows you to use the original VLAN Tag for differentiating users and services and the new VLAN Tag for carrying services and VPNs, making VPN configuration simple and practicable. Through VLAN VPN configuration, Ethernet Switches can better meet the requirement in MAN.

If VLAN VPN is enabled on a port, every packet received on the port (no matter whether the packet carries a VLAN Tag or not) will be given a new Tag that specifies the default VLAN of this port. Thus, a tagged packet received on the port will be sent out with dual tags and an untagged one will be sent out with only the default VLAN tag of the port.

Perform the following configuration in Ethernet port view.

To do …	Use the command …
Enable the port VLAN VPN feature	vlan-vpn enable
Disable the port VLAN VPN feature	undo vlan-vpn

 

Note that if GVRP, STP, or 802.1x has been enabled on the port, you will be unable to enable the VLAN VPN feature.

By default, the port VLAN VPN feature is disabled.

1.2.16  Enabling/Disabling the VLAN Filtering Function on an Ethernet Port

Perform the following configuration in Ethernet port view.

To do …	Use the command …
Enable the VLAN filtering function	vlan filter enable
Disable the VLAN filtering function	vlan filter disable

 

By default, the VLAN filtering function is enabled on Ethernet ports.

With the VLAN filtering function enabled, the port permits only the packets of the VLAN where it resides. With the VLAN filtering function disabled, the port forwards all the packets it received.

1.2.17  Copying Port Configurations to Other Ports

To keep the configurations of some ports consistent with a specified port, you can use the copy configuration command to copy the configurations of that specified port to the other ports. Such configurations may involve STP, QoS, LACP, and port settings as follows:

Table 1-1 Configurations that can be copied

Attribute	Detailed Setting
STP settings	Enable/disable STP
	Port priority
	Path cost
	Link attributes(point-to-point or not)
	Port mCheck
	Max transmission speed
	Enable/disable root protection
	Enable/disable loop protection
	Edge or non-edge port
	Reset ARP or not
QoS settings	Define/apply flow template
	Traffic reshaping
	Traffic redirection
	Packet filtering
	Priority re-assignment
	Traffic statistics
	Traffic mirroring
	Rate limiting
Port settings	Permitted VLAN ID
	Default VLAN ID
	Add ports to VLAN
	Default 802.1p priority
	Port speed, duplex mode
	Port link type
LACP	Enable/disable LACP on the port

 

 

Perform the following configuration in system view.

To do …	Use the command …
Copy port configurations to other ports	copy configuration source { interface-type interface-number | aggregation-group agg-id } destination { interface-list [ aggregation-group agg-id ] | aggregation-group agg-id }

 

 

1.2.18  Setting the Link-State Hold Time

Frequent port up/down may affect the performance of the switch. To avoid the situation, you may configure the link-state hold time.

The system can record and report port changes to the user in one of the following two ways.

l           Interruption report: The switch does not suppress port state change reporting and reports the changes immediately.

l           Polling report: The switch suppresses port state change reporting. You can use the link-status hold command to set the link-state hold time.

With the link-state hold time set to zero seconds, the switch always prefers the interruption report mode to the polling report mode, so long as the former is supported.

With the link-state hold time set to a non-zero value, the port adopts the polling report mode, whether the interruption report mode is supported or not.

Therefore, you can switch the port state change reporting mode by setting the link-state hold time.

Perform the following configuration in system view.

To do …	Use the command …
Set the link-state hold time	link-status hold hold-time
Restore the default value	undo link-status hold

 

The default link-state hold time is 3 seconds.

1.2.19  Setting the Ethernet Port in Loopback Mode

Perform the following configuration in Ethernet port view.

To do …	Use the command …
Set the Ethernet port in loopback mode	loopback { external | internal }
Remove loopback configuration on the port	undo loopback

 

 

By default, the Ethernet port is not in loopback mode.

1.3  Displaying and Maintaining Ethernet Port Configuration

To do …	Use the command …	Remarks
Display information for specified port(s)	display interface [ interface-type | interface-type interface-number [ packets ] ]	Available in any view
Display hybrid or trunk ports	display port { hybrid | trunk }	Available in any view
Display the statistics information for the specified port(s)	display counters [ rate ] { inbound | outbound } interface [ interface-type ]	Available in any view
Clear the statistics of the specified port(s)	reset counters interface [ interface-type | interface-type interface-number ]	Available in user view
Display Jumbo frame configuration on all cards	display jumboframe configuration	Available in any view
Display the current alarm information of the optical transceiver module plugged in the specified port or all optical transceiver modules	display transceiver alarm interface [ interface-type interface-number ]	Available in any view
Display the currently measured values of the diagnosis parameters for the pluggable optical transceiver in the specified port or all transceivers	display transceiver diagnosis interface [ interface-type interface-number ]	Available in any view
Display the major parameters of the optical transceiver plugged in the specified port or all optical transceivers	display transceiver interface [ interface-type interface-number ]	Available in any view
Display the radio frequency identification (RFID) information of the pluggable optical transceiver in the specified port or all optical transceivers	display transceiver manuinfo interface [ interface-type interface-number ]	Available in any view

 

 

1.4  Ethernet Port Configuration Example

I. Network requirements

l           Switch A is connected to Switch B through GigabitEthernet 2/1/1.

l           Configure GigabitEthernet 2/1/1 as a trunk port permitting packets of VLAN 2, VLAN 6 through VLAN 50, and VLAN 100. Set VLAN 100 as the default VLAN on GigabitEthernet 2/1/1.

II. Network diagram

Figure 1-1 Network diagram for Ethernet port configuration

III. Configuration procedure

 

 

# Enter the Ethernet port view of GigabitEthernet 2/1/1.

<H3C> system-view

System View: return to User View with Ctrl+Z.

[H3C] interface GigabitEthernet2/1/1

# Configure GigabitEthernet 2/1/1 as a trunk port permitting packets of VLAN 2, VLAN 6 through VLAN 50, and VLAN 100.

[H3C-GigabitEthernet2/1/1] port link-type trunk

[H3C-GigabitEthernet2/1/1] port trunk permit vlan 2 6 to 50 100

[H3C-GigabitEthernet2/1/1] quit

# Create VLAN 100.

[H3C] vlan 100

[H3C-vlan100] quit

# Configure VLAN 100 as the default VLAN on GigabitEthernet 2/1/1.

[H3C] interface GigabitEthernet2/1/1

[H3C-GigabitEthernet2/1/1] port trunk pvid vlan 100

1.5  Troubleshooting Ethernet Ports

Symptom 1: Default VLAN ID configuration fails.

Solution: Take the following steps:

l           Execute the display interface or display port command to check whether the port is a trunk port or a hybrid port. If it is neither, configure it as a trunk or hybrid port.

l           Configure the default VLAN ID.

Symptom 2: The port is in down status.

Solution: Check that

l           The cable connection is correct and the optical fibers are correctly connected.

l           The port has not been administratively shut down.

l           The correct optical module is used.