Vlans; About Vlans For Gigabit Ethernet - Cisco MDS 9000 series Configuration Manual

Chapter 7 Configuring IPv4 for Gigabit Ethernet Interfaces
S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m
Use the show interface gigabitethernet command to verify if the Gigabit Ethernet interface is up.
Example 7-1

VLANs

This section describes virtual LAN (VLAN) support in Cisco MDS NX-OS and includes the following
topics:
•
•
•

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:
•
•
Use the VLAN ID as a subscription to the Gigabit Ethernet interface name to create the subinterface
name:
slot-number / port-number.VLAN-ID
OL-19525-01,Cisco MDS NX-OS Release 4.2(1)
Verifying Gigabit Ethernet Connectivity
switch# ping 10.100.1.25
PING 10.100.1.25 (10.100.1.25): 56 data bytes
64 bytes from 10.100.1.25: icmp_seq=0 ttl=255 time=0.1 ms
64 bytes from 10.100.1.25: icmp_seq=1 ttl=255 time=0.1 ms
64 bytes from 10.100.1.25: icmp_seq=2 ttl=255 time=0.1 ms
--- 10.100.1.25 ping statistics ---
3 packets transmitted, 3 packets received, 0% packet loss
round-trip min/avg/max = 0.1/0.1/0.1 ms
About VLANs for Gigabit Ethernet, page 7-5
Configuring the VLAN Subinterface, page 7-6
Interface Subnet Requirements, page 7-6
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.
Cisco MDS 9000 Family NX-OS IP Services Configuration Guide

VLANs

7-5