First Published: February 20, 2020

Configuration Limits

Configuration Limits

Cisco UCS Manager Release 4.1 introduces the UCS 64108 Fabric Interconnect to Cisco UCS 6400 Series Fabric Interconnects. The Cisco UCS 6400 Series Fabric Interconnect now consists of UCS 64108 and UCS 6454 Fabric Interconnects. The following tables list the Cisco verified limits for Cisco UCS 6200, 6332, 6324, and 6400 Series Fabric Interconnects with Cisco UCS Manager Release 4.1.

The limits in this document indicate the maximum scale capability tested for the corresponding feature individually. This number is the absolute maximum currently supported by Cisco UCS Manager for the corresponding feature. When used in combination, the practical limit for each feature may be lower than the maximum limit cited in this document.

Ethernet Environment Configuration Limits

Feature

Cisco UCS 6200 Series

Cisco UCS 6332 Series

Cisco UCS 6324

Cisco UCS 6400 Series

Cisco UCS 6536

Active VLANs per Cisco UCS domain

2000

This is the combined total of VLANs and VSANs that can be configured on each fabric interconnect. Of that total, no more than 32 can be VSANs.

3000

This is the combined total of VLANs and VSANs that can be configured on each fabric interconnect. Of that total, no more than 32 can be VSANs.

982

3000

This is the combined total of VLANs and VSANs that can be configured on each fabric interconnect. Of that total, no more than 32 can be VSANs.

3000

This is the combined total of VLANs and VSANs that can be configured on each fabric interconnect. Of that total, no more than 32 can be VSANs.

VLAN/VSAN ID space per Cisco UCS domain

4030-4047 and 4095 are reserved

4030-4047 and 4095 are reserved

4030-4047 and 4095 are reserved

4030-4047 and 4095 are reserved and fixed

4030-4047 and 4095 are reserved and fixed

STP logical Interfaces (also referred to as VLAN port count) per fabric interconnect *

64000 (with VLAN Port Count Optimization enabled)

32000 (with VLAN Port Count Optimization disabled)

64000 (with VLAN Port Count Optimization enabled)

16000 (with VLAN Port Count Optimization disabled)

4096

108000 (with VLAN Port Count Optimization enabled)

16000 (with VLAN Port Count Optimization disabled)

108000 (with VLAN Port Count Optimization enabled)

Note

 

*The only exception is for failover vNICs. These consume resources on a per Cisco UCS domain basis.

VIFs (virtual interfaces) per fabric interconnect that map through VM-FEX to a vNIC or VM itself *

KVM VM-FEX—2000 **

KVM VM-FEX—2670 **

648

1600

1600

Note

 

*The only exception is for failover vNICs. These consume resources on a per Cisco UCS domain basis.

Note

 

**Beginning with Cisco UCS Manager Release 4.1(1), VMware VM-FEX and Hyper-V VM-FEX are no longer supported. VM-FEX is supported only with Linux.

IGMP groups per Cisco UCS domain

4000

4000

1000

16000

16000

Uplink port channels per fabric interconnect

12

12

4

8*

8

Note

 

*When there is a mix of FC SAN port channels and FCoE SAN port channels, then together they cannot exceed a total of 8 port channels in the system.

FC SAN port channels + FCoE SAN port channels: 8 (4 +4, 3+ 5, 2+ 6, 1+7, or 0+8)

Maximum number of uplinks per fabric interconnect (including up to12 port channels)

31

31

4

31

31

Member interfaces per port channel

16

16

4

16

16

Interfaces per FCoE SAN port channel

16

16

4

16

16

Primary VLANs per Cisco UCS domain*

150

150

N/A

200

200

Note

 

*Private VLANs count towards the total number of VLANs.

Secondary VLANs per Cisco UCS domain

1000

1000

N/A

1000

1000

Maximum secondary VLANs per primary VLANs.

200

200

N/A

200

200

QOS system classes per Cisco UCS domain

6 (including the class default)

6 (including the class default)

6

6 (including the class default)

6 (including the class default)

Feature

Cisco UCS 6200 Series

Cisco UCS 6332 Series

Cisco UCS 6324

Cisco UCS 6400 Series

Active VLANs per Cisco UCS domain

2000

This is the combined total of VLANs and VSANs that can be configured on each fabric interconnect. Of that total, no more than 32 can be VSANs.

3000

This is the combined total of VLANs and VSANs that can be configured on each fabric interconnect. Of that total, no more than 32 can be VSANs.

982

3000

VLAN/VSAN ID space per Cisco UCS domain

4030-4047 and 4095 are reserved

4030-4047 and 4095 are reserved

4030-4047 and 4095 are reserved

4030-4047 and 4095 are reserved and fixed

STP logical Interfaces (also referred to as VLAN port count) per fabric interconnect *

64000 (with VLAN Port Count Optimization enabled)

32000 (with VLAN Port Count Optimization disabled)

64000 (with VLAN Port Count Optimization enabled)

16000 (with VLAN Port Count Optimization disabled)

4096

108000 (with VLAN Port Count Optimization enabled)

16000 (with VLAN Port Count Optimization disabled)

Note

 

*The only exception is for failover vNICs. These consume resources on a per Cisco UCS domain basis.

VIFs (virtual interfaces) per fabric interconnect that map through VM-FEX to a vNIC or VM itself *

KVM VM-FEX—2000 **

KVM VM-FEX—2670 **

648

1600

Note

 

*The only exception is for failover vNICs. These consume resources on a per Cisco UCS domain basis.

Note

 

**Beginning with Cisco UCS Manager Release 4.1(1), VMware VM-FEX and Hyper-V VM-FEX are no longer supported. VM-FEX is supported only with Linux.

IGMP groups per Cisco UCS domain

4000

4000

1000

16000

Uplink port channels per fabric interconnect

12

12

4

12*

Note

 

*When there is a mix of FC SAN port channels and FCoE SAN port channels, then together they cannot exceed a total of 12 port channels in the system.

FC SAN port channels + FCoE SAN port channels: 12

Maximum number of uplinks per fabric interconnect (including up to12 port channels)

31

31

4

31

Member interfaces per port channel

16

16

4

16

Interfaces per FCoE SAN port channel

16

16

4

16

Primary VLANs per Cisco UCS domain*

150

150

N/A

150

Note

 

*Private VLANs count towards the total number of VLANs.

Secondary VLANs per Cisco UCS domain

1000

1000

N/A

1000

Maximum secondary VLANs per primary VLANs.

200

200

N/A

200

QOS system classes per Cisco UCS domain

6 (including the class default)

6 (including the class default)

6

6 (including the class default)

VIC Environment Configuration Limits

Static Virtual NICs per Host for Cisco UCS 6200 Series, Cisco UCS 6332 Series, Cisco 6324, 6400, and 6536 Series Fabric Interconnects

OS vNICs vHBAs Max Combination of vNICs and vHBAs

Windows 2016

20

16

12 Enics and 8 Fnics

Windows 2019

20

16

12 Enics and 8 Fnics

Red Hat Enterprise Linux 7.6 - 7.7, 8.0 - 8.1

32

16

24 Enics and 8 Fnics

ESXi 6.5 U3, 6.7 U2, 6.7 U3

26

16

18 Enics and 8 Fnics

or 24 Enics and 2 Fnics

XenServer 7.1 – 7.6, 8.0

32

16

24 Enics and 8 Fnics

OL Unbreakable Enterprise Kernel R4 U7, R5 U1, R5 U2.

OL

18

6

18 Enics and 6 Fnics

SUSE Linux Enterprise Server 12 SP4, 12 SP5, 15, 15 SP1

32

16

24 Enics and 8 Fnics

Ubuntu 16.04.5, 16.04.06, 18.04.1, 18.04.2

32

N/A

32 Enics

CentOs 7.6 - 8.0

32

16

24 Enics and 8 Fnics

Dynamic Virtual NICs

Dynamic vNICs are not supported by Cisco 6400 Series Fabric Interconnects. Dynamic vNICs are not supported on VIC 14XX adapters with Windows and ESX OS versions.


Note

**Beginning with Cisco UCS Manager Release 4.1(1), VMware VM-FEX and Hyper-V VM-FEX are no longer supported. VM-FEX is supported only with Linux.

Cisco UCS 6200 Series, Cisco UCS 6332 Series, and Cisco 6324 Fabric Interconnect
OS Max vNICs for Emulated Mode Max vNICs for Hypervisor Bypass Mode

Half Width Blade (1 VIC)

Full Width Blade (2 VIC)

Half Width Blade (1 VIC)

Full Width Blade (2 VIC)

RHEL 6.2 - 7.7, 8.0, 8.1 (SR-IOV with MacVTap)

114 vNICs and 2 vHBAs

223 vNICs with 4 vHBAs

N/A

N/A

Note

 

KVM VM-FEX is not supported on the Cisco 6324 Fabric Interconnect

KVM 6.3 —7.7, 8.0, 8.1 (SR-IOV with PCI Passthrough)

N/A

N/A

114 vNICs and 2 vHBAs

223 vNICs with 4 vHBAs

Note

 

KVM VM-FEX is not supported on the Cisco 6324 Fabric Interconnect

Fibre Channel Environment Configuration Limits

Feature

Cisco UCS 6200 Series

Cisco UCS 6332 Series

Cisco UCS 6324

Cisco UCS 6400 Series

Cisco UCS 6536

VSANs

32

A combined total of 2000 VLANs and VSANs can be configured on each fabric interconnect.

6332-16UP—15

6332—32

A combined total of 3000 VLANs and VSANs can be configured on each fabric interconnect.

32

32

32

Zones

  • Per VSAN—8000

  • Across all VSANS—8000

If you implement Cisco UCS Manager-based zoning, the maximum number of targets per service profile is 64.

  • Per VSAN—8000

  • Across all VSANS—8000

If you implement Cisco UCS Manager-based zoning, the maximum number of targets per service profile is 64.

  • Per VSAN—4000

  • Across all VSANS—4000

If you implement Cisco UCS Manager-based zoning, the maximum number of targets per service profile is 4.

  • Per VSAN—4000

  • Across all VSANS—4000

If you implement Cisco UCS Manager-based zoning, the maximum number of targets per service profile is 64.

  • Per VSAN—4000

  • Across all VSANS—4000

If you implement Cisco UCS Manager-based zoning, the maximum number of targets per service profile is 64.

Native FC links

6248—Up to 48

6296—Up to 96

6332-16UP—16

6332—N/A

4

16

Ports 1 to 16 support native FC*

16

Ports 1/33/1 to 1/36/4 support native FC

Note

 

*For UCS 6454, the number of FC links was increased from 8 to 16 in Cisco UCS Manager Release 4.0(4a)

Virtual Fibre Channel interfaces per fabric interconnect

320

320

30

320

320

Virtual Fibre Channel interfaces per blade

16

16

16

16

16

FC-NVMe initiators per blade

4

4

4

4

4

Flogis per fabric interconnect

320

320

255

320

320

Maximum number of FC SAN port channels

4

4

1

4

4

Maximum port channel members per port channel

16

16

4

16

16

Port channel mode in NPV

Active

Active

N/A

Active

Active

Port channel mode in FC switching

On

On

On

On

On

VM-FEX Environment Configuration Limits


Note

**Beginning with Cisco UCS Manager Release 4.1(1), VMware VM-FEX and Hyper-V VM-FEX are no longer supported. VM-FEX is supported only with Linux.

Cisco UCS 6200 Series Cisco UCS 6332 Series Cisco UCS 6400 Series

Cisco UCS 6536

Port profiles per Cisco UCS domain

512

512

N/A

N/A

Dynamic ports per port profile

4096

4096

N/A

N/A

General Network Configuration Limits

Feature Cisco UCS 6200 Series Cisco UCS 6332 Series Cisco UCS 6324 Cisco UCS 6400 Series

Unicast MAC addresses per fabric interconnect

20000 entries

32000 entries

20000 entries

96000 entries

96000 entries

Multicast MAC addresses per fabric interconnect

7000

7000

400

7000

7000

Secured interfaces per Cisco UCS domain

1000

1000 out of the 2000 VIFs can be port-secured.

1000

1000 out of the 2000 VIFs can be port-secured.

N/A

1000

1000 out of the 2000 VIFs can be port-secured.

1000

1000 out of the 2000 VIFs can be port-secured.

Secured MAC addresses per Cisco UCS domain

2000

MAC addresses secured using the port-security feature.

2000

MAC addresses secured using the port-security feature.

N/A

8000

MAC addresses secured using the port-security feature.

8000

MAC addresses secured using the port-security feature.

Maximum MTU

9000

9000

9216

9000

9000

1G ports 1

6248—Up to 48

6296—Up to 96

6332-16UP—16

6332—First 4 ports

4—First 4 unified ports

6454 - 4 (45-48)

64108 - 8 (89-96)

6536 - 2 unified ports (9 and 10)

SPAN active sessions per fabric interconnect

4

4

2

4

4

Appliance ports per fabric interconnect

16

16

2

16

16
1 For Ethernet Traffic Monitoring sessions in 6332 and 6332-16UP FIs, you cannot use the 1Gbps speed configuration for the configured Ethernet Destination Port.

General Management Configuration Limits

Feature Cisco UCS 6200 Series Cisco UCS 6332 Series Cisco UCS 6324 Cisco 6400 Series

Cisco UCS 6536

Chassis per Cisco UCS domain

20

20

2

20

20

Maximum combined number of blade and rack servers per Cisco UCS domain

160

160

20 (16 blade servers and 4 rack servers)

160

160
Maximum number of Fabric Extenders per Cisco UCS domain 2

20 (10 per fabric interconnect)

20 (10 per fabric interconnect)

N/A

20 (10 per fabric interconnect)

20 (10 per fabric interconnect)

Local user accounts per Cisco UCS domain

48

48

48

48

48

Concurrent logins per user account

64

This total includes a maximum of 32 concurrent GUI logins and 32 concurrent CLI logins per user account.

This value is the same for both local and remote user accounts.

64

This total includes a maximum of 32 concurrent GUI logins and 32 concurrent CLI logins per user account.

This value is the same for both local and remote user accounts.

64

This value is the same for both local and remote user accounts.

This total includes a maximum of 32 concurrent GUI logins and 32 concurrent CLI logins per user account.

64

This total includes a maximum of 32 concurrent GUI logins and 32 concurrent CLI logins per user account.

This value is the same for both local and remote user accounts.

64

This total includes a maximum of 32 concurrent GUI logins and 32 concurrent CLI logins per user account.

This value is the same for both local and remote user accounts.

Active KVM sessions per individual CIMC

4

4

4

4

4

Concurrent CLI logins per Cisco UCS Manager

32

32

32

32

32

Concurrent GUI logins per Cisco UCS Manager

256

256

256

256

256

Number of LDAP groups per Cisco UCS Manager

160

160

160

160

160

Number of adapter end points per Cisco UCS Manager

320

320

30

320

320
2

There is a limit of twenty FEX for each UCS domain. For example, you can either have ten 2232 FEX for each FI or a combination of ten chassis and ten FEX.