Руководство По Проектированию для Cisco Cisco Nexus 5010 Switch
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Figure 2. Design 3: vPC Access and Non-vPC Aggregation Layers
VLAN Allocation on Cisco Nexus 5000 Series
The Cisco Nexus 5500 platform switches have more VLAN space than the other Cisco Nexus 5000 Series
Switches.
Cisco Nexus 5500 Platform
Starting from Cisco NX-OS Release 5.0(2)N1(1), the Cisco Nexus 5500 platform hardware can use up to 4013
concurrent VLANs. You can use any VLAN in the ranges 1 through 3967 and 4048 through 4093 so long as the
total number of concurrent VLANs does not exceed the maximum. Note that some VLANs may also be used as
virtual SANs (VSANs), in which case they are not available for regular LAN traffic.
The Cisco Nexus 5500 hardware supports a total of 4096 VLANs, with the following stipulations:
●
Of the total number of VLANs supported, 4013 VLANs are available for use, and 83 are reserved by Cisco
NX-OS.
●
If you enable FCoE by using the command feature FCoE, two internal VSANs are allocated from the
reserved range.
●
When you configure FCoE, each VSAN or VLAN requires two resources: one VLAN for FCoE and the
VLAN hardware resource for Fibre Channel. Thus, the total number of available VLANs for TCP/IP traffic
with FCoE deployments is 4013 minus 2 times the number of VSANs.
●
If you configure Layer 3 interfaces, each Layer 3 interface uses a VLAN internally.
You can use the command show resource vlan to verify VLAN use.
Note: The reserved VLANs in the current implementation include VLANs used for diagnostics purposes and for
communication between the Cisco Nexus 5000 Series and Cisco Nexus 2000 Series. At the time of this writing, the
communication between the Cisco Nexus 5000 Series and Cisco Nexus 2000 Series. At the time of this writing, the
reserved VLAN range cannot be modified, but it can be mapped in its entirety to the same Multiple Spanning Tree
(MST) instance used by nonreserved VLANs.