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Cisco SN 5428-2 Storage Router Software Configuration Guide
OL-4691-01
Chapter 1 Before Configuring SN 5428-2 Storage Router Software
Zoning Overview
Figure 1-21 VLAN Access Overview
If the SN 5428-2 is used in a Cisco switched network environment, configure the SN 5428-2 to use the
Cisco proprietary VLAN Trunking Protocol (VTP). With VTP, the SN 5428-2 will exchange VTP
packets with an externally attached switch to dynamically learn about the VLANs that are accessible in
the IP network. The SN 5428-2 then uses VTP to propagate VLAN information around the switched
network using layer 2 multicast packets.
If the SN 5428-2 is used in a non-Cisco switched network environment, configure the SN 5428-2 for
VLAN without using VTP. The SN 5428-2 does not exchange VTP packets to learn about the VLANs in
the network. Instead, you must manually assign VLANs in the network with a VLAN identifier (VID)
number. You can optionally assign each VLAN with a unique name and manually set the MTU size.
If the SN 5428-2 participates in a cluster, the VLAN information configured for the SN 5428-2 is
propagated to all storage routers in the cluster.
The SN 5428-2 uses IEEE 802.1Q standard for VLAN encapsulation. With 802.1Q encapsulation,
VLAN information is carried in packets sent and received through the SN 5428-2 Gigabit Ethernet
interface. These packets contain the VID and other VLAN information needed for VLAN members to
participate in a VLAN.
A VLAN is granted access to storage devices via a SCSI routing instance configured in the SN 5428-2.
The iSCSI targets assigned to the SCSI routing instance determine which storage devices the VLAN can
access.
Zoning Overview
The SN 5428-2 supports FC fabric zoning. Zoning enables you to divide the devices of the fabric into
zones for more efficient and secure communication among functionally grouped nodes.
Note FC fabric zoning participation is not supported in SN 5428-2s deployed for transparent SCSI routing.
Cisco SN 5428-2
802.1Q trunk
Configured with two SCSI
routing instances named
SR100 and SR200
VLAN 200
VLAN 100
IP
Storage devices accessible by
VLAN 100 via SCSI routing
instance SR100
Storage device accessible by
VLAN 200 via SCSI routing
instance SR200
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