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Interface Descriptions

See the Inferfaces Configuration Guide, Cisco DCNM for SANCisco MDS 9000 Family NX-OS Interfaces Configuration Guide for details on configuring the switch port description for any interface.

Beacon Mode

See the Inferfaces Configuration Guide, Cisco DCNM for SANCisco MDS 9000 Family NX-OS Interfaces Configuration Guide for details on configuring the beacon mode for any interface.

About VLANs for Gigabit Ethernet

Virtual LANs (VLANs) create multiple virtual Layer 2 networks over a physical LAN network. VLANs provide traffic isolation, security, and broadcast control.

Gigabit Ethernet ports automatically recognize Ethernet frames with IEEE 802.1Q VLAN encapsulation. If you need to have traffic from multiple VLANs terminated on one Gigabit Ethernet port, configure subinterfaces—one for each VLAN.

Note If the IPS module or MPS-14/2 module is connected to a Cisco Ethernet switch, and you need to have traffic from multiple VLANs coming to one IPS port, verify the following requirements on the Ethernet switch:

• The Ethernet switch port connected to the IPS module or MPS-14/2 module is configured as a trunking port.
• The encapsulation is set to 802.1Q and not ISL, which is the default.

Use the VLAN ID as a subscription to the Gigabit Ethernet interface name to create the subinterface name:

slot-number / port-number.VLAN-ID

Interface Subnet Requirements

Gigabit Ethernet interfaces (major), subinterfaces (VLAN ID), and management interfaces (mgmt 0) can be configured in the same or different subnet depending on the configuration (see Table 43-1 ).

Note The configuration requirements in Table 43-1 also apply to Ethernet PortChannels.

Configuring Gigabit Ethernet Interface

To configure the Gigabit Ethernet interface, follow these steps:

Step 1 Expand Switches > Interfaces > Ethernet > IPS.

You see the Gigabit Ethernet Configuration in the Information pane.

Step 2 Click the IP Addresses tab.

Step 3 Click Create Row.

You see the Create Gigabit Ethernet Interface dialog box.

Step 4 Select the switch on which you want to create the Gigabit Ethernet interface.

Step 5 Enter the interface. For example, 2/2 for slot 2, port 2.

Step 6 Enter the IPv4 address (10.1.1.100) and subnet mask (255.255.255.0).

Step 7 Click Create to save these changes or click Close to discard any unsaved changes.

Configuring Autonegotiation

By default, autonegotiation is enabled all Gigabit Ethernet interface. You can enable or disable autonegotiation for a specified Gigabit Ethernet interface. When autonegotiation is enabled, the port automatically detects the speed or pause method, and duplex of incoming signals based on the link partner. You can also detect link up conditions using the autonegotiation feature.

To configure autonegotiation, follow these steps:

To configure autonegotiation, follow these steps:

Step 1 Expand Switches > Interfaces > Ethernet > IPS.

You see the Gigabit Ethernet Configuration in the Information pane.

Step 2 In the General tab, you can enable or disable the Auto Negotiate option for a specific switch.

Step 3 Click Apply Changes .

Configuring the MTU Frame Size

You can configure the interfaces on a switch to transfer large (or jumbo) frames on a port. The default IP maximum transmission unit (MTU) frame size is 1500 bytes for all Ethernet ports. By configuring jumbo frames on a port, the MTU size can be increased up to 9000 bytes.

Note The minimum MTU size is 576 bytes.

Tip MTU changes are disruptive, all FCIP links and iSCSI sessions flap when the software detects a change in the MTU size.

You do not need to explicitly issue the shutdown and no shutdown commands.

To configure the MTU frame size, follow these steps:

To configure the MTU frame size, follow these steps:

Step 1 Expand Switches > Interfaces > Ethernet > IPS.

You see the Gigabit Ethernet Configuration in the Information pane.

Step 2 In the General tab, in the Mtu column, you can enter a new value to configure the MTU Frame Size for a specific switch. For example 3000 bytes. The default is 1500 bytes.

Step 3 Click Apply Changes .

Configuring Promiscuous Mode

You can enable or disable promiscuous mode on a specific Gigabit Ethernet interface. By enabling the promiscuous mode, the Gigabit Ethernet interface receives all the packets and the software then filters and discards the packets that are not destined for that Gigabit Ethernet interface.

To configure the promiscuous mode, follow these steps:

To configure the promiscuous mode, follow these steps:

Step 1 Expand Switches > Interfaces > Ethernet > IPS.

You see the Gigabit Ethernet Configuration in the Information pane.

Step 2 In the General tab, you can enable or disable the Promiscuous Mode option for a specific switch.

Step 3 Click Apply Changes .

Configuring the VLAN Subinterface

To configure a VLAN subinterface (VLAN ID), follow these steps:

To configure a VLAN subinterface (VLAN ID) using Device Manager, follow these steps:

Step 1 Select Interface > Ethernet and iSCSI.

Step 2 Click the Sub Interfaces tab.

Step 3 Select the Gigabit Ethernet subinterface on which 802.1Q should be used.

Step 4 Click the Edit IP Address button.

Step 5 Enter the IPv4 address and subnet mask for the Gigabit Ethernet interface.

Step 6 Click Create to save the changes or you may click Close .

Configuring Static IPv4 Routing

To configure static IPv4 routing (see Figure 43-1) through the Gigabit Ethernet interface, follow these steps:

Applying IPv4-ACLs on Gigabit Ethernet Interfaces

To apply an IPv4-ACL on a Gigabit Ethernet interface, follow these steps:

Clearing ARP Cache

The ARP cache can be cleared in two ways: clearing just one entry or clearing all entries in the ARP cache.

Use the clear ips arp command to clear the ARP cache. See Example 43-1 and Example 43-2.

Examples

Example 43-1 Clearing One ARP Cache Entry

Example 43-2 Clearing All ARP Cache Entries

Verifying Gigabit Ethernet Connectivity

Once the Gigabit Ethernet interfaces are connected with valid IP addresses, verify the interface connectivity on each switch. Ping the IP host using the IP address of the host to verify that the static IP route is configured correctly.

Note If the connection fails, verify the following, and ping the IP host again:
- The IP address for the destination (IP host) is correctly configured.
- The host is active (powered on).
- The IP route is configured correctly.
- The IP host has a route to get to the Gigabit Ethernet interface subnet.
- The Gigabit Ethernet interface is in the up state.

Use the ping command to verify the Gigabit Ethernet connectivity (see Example 43-3). The ping command sends echo request packets out to a remote device at an IP address that you specify.

Use the show interface gigabitethernet command to verify if the Gigabit Ethernet interface is up.

Example 43-3 Verifying Gigabit Ethernet Connectivity

Displaying the IPv4 Route Table

The ip route interface command takes the Gigabit Ethernet interface as a parameter and returns the route table for the interface. See Example 43-4.

Example 43-4 Displays the IP Route Table

Connected (C) identifies the subnet in which the interface is configured (directly connected to the interface). Static (S) identifies the static routes that go through the router.

Displaying ARP Cache

You can display the ARP cache on Gigabit Ethernet interfaces.

Note Use the physical interface, not the subinterface, for all ARP cache commands.

Use the show ips arp interface gigabitethernet command to display the ARP cache on the Gigabit Ethernet interfaces. This command takes the Ethernet interface as a parameter and returns the ARP cache for that interface. See Example 43-5.

Example 43-5 Displays ARP Caches

Displaying IPv4 Statistics

Use the show ips stats ip interface gigabitethernet to display and verify IP v4 statistics. This command takes the main Ethernet interface as a parameter and returns the IPv4 statistics for that interface. See Example 43-6.

Note Use the physical interface, not the subinterface, to displayIPv4 statistics.

Example 43-6 Displays IPv4 Statistics

Related Document

Standards

RFCs

MIBs