Configuring Promiscuous Mode; About Vlans For Gigabit Ethernet; Interface Subnet Requirements; Vlans - HP Cisco MDS 9216 - Fabric Switch Configuration Manual

Configuring Gigabit Ethernet Interfaces for IPv4
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
The minimum MTU size is 576 bytes.
Note
Tip MTU changes are disruptive, all FCIP links and iSCSI sessions flap when the software detects a change
in the MTU size.

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.

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 (the

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 52-1 Subnet Requirements for Interfaces
Interface 1
Gigabit Ethernet 1/1
Gigabit Ethernet 1/1.100 Gigabit Ethernet 1/2.100
Gigabit Ethernet 1/1.100 Gigabit Ethernet 1/2.200
Cisco MDS 9000 Family CLI Configuration Guide
52-6
<slot-number>/<port-number>.<VLAN-ID>
Interface 2
Gigabit Ethernet 1/2
).
Same Subnet
Allowed Notes
Yes Two major interfaces can be configured in the same
or different subnets.
Yes Two subinterfaces with the same VLAN ID can be
configured in the same or different subnets.
No Two subinterfaces with different VLAN IDs cannot
be configured in the same subnet.
Chapter 52 Configuring IP Storage
Table 52-1).
OL-16184-01, Cisco MDS SAN-OS Release 3.x